COMLEX-USA (Comprehensive Osteopathic Medical Licensing Examination) — Questions and Answers

Question 1: Which drug class is used to treat opioid-induced constipation by acting as a peripherally restricted mu-opioid receptor antagonist?

Bisacodyl
Docusate sodium
Polyethylene glycol
Methylnaltrexone (PAMORA) (Correct answer)

Correct answer: Methylnaltrexone (PAMORA)

PAMORAs like methylnaltrexone block peripheral gut opioid receptors without crossing the blood-brain barrier, relieving constipation without reversing analgesia.

Question 2: Sensitivity of a screening test measures its ability to correctly identify:

True positives (patients who have the disease) (Correct answer)
True negatives (patients who do not have the disease)
The proportion of positive tests that are correct
The overall accuracy of the test

Correct answer: True positives (patients who have the disease)

Sensitivity = TP / (TP + FN); a highly sensitive test rarely misses true cases and is ideal for ruling OUT disease when the result is negative.

Question 3: Which of the following statements is NOT true about ‘Clinical Guidelines’?

They assist practitioners in making decisions for a clinical circumstance.
They are evidence-based statements.
They provide recommendations to optimize patient care.
They are based solely on personal opinions of healthcare providers. (Correct answer)

Correct answer: They are based solely on personal opinions of healthcare providers.

Clinical guidelines are evidence-based statements developed to optimize patient care and assist practitioners in making informed decisions. They are systematically formulated using the best available research evidence and expert consensus, rather than being based solely on individual opinions. This ensures a standardized, high-quality, and objective approach to clinical practice.

Question 4: Which federal law protects physicians who provide emergency care in good faith from malpractice liability?

Emergency Medical Treatment and Labor Act (EMTALA) combined with Good Samaritan laws (Correct answer)
Anti-Kickback Statute
HIPAA Privacy Rule
Stark Law

Correct answer: Emergency Medical Treatment and Labor Act (EMTALA) combined with Good Samaritan laws

Good Samaritan laws provide liability protection for physicians rendering emergency aid, and EMTALA governs emergency care obligations in hospital settings.

Question 5: A 28-year-old man with no psychiatric history experiences sudden onset psychosis with delusions and hallucinations following an acute stressor. Symptoms fully resolve after 3 weeks with complete return to baseline. What is the most likely diagnosis?

Schizophrenia
Substance-Induced Psychotic Disorder
Schizophreniform Disorder
Brief Psychotic Disorder (Correct answer)

Correct answer: Brief Psychotic Disorder

Brief Psychotic Disorder involves sudden onset psychotic symptoms lasting 1 day to 1 month with full return to premorbid function; Schizophreniform requires 1–6 months and Schizophrenia requires ≥6 months.

Question 6: Which class of drugs for COPD works by blocking muscarinic receptors to cause bronchodilation?

Long-acting beta-2 agonists (LABAs)
Inhaled corticosteroids (ICS)
Long-acting muscarinic antagonists (LAMAs) (Correct answer)
Phosphodiesterase-4 inhibitors

Correct answer: Long-acting muscarinic antagonists (LAMAs)

LAMAs such as tiotropium block M3 muscarinic receptors in airway smooth muscle, reducing bronchoconstriction and mucus secretion in COPD.

Question 7: Which ethical principle requires physicians to act in the best interest of the patient?

Beneficence (Correct answer)
Non-maleficence
Autonomy
Justice

Correct answer: Beneficence

Beneficence obligates physicians to take positive actions that promote the health and well-being of their patients.

Question 8: The positive predictive value (PPV) of a test increases as:

Sample size decreases
Disease prevalence in the tested population increases (Correct answer)
Specificity decreases
Test sensitivity decreases

Correct answer: Disease prevalence in the tested population increases

PPV (probability a positive test is truly positive) rises when the disease is more prevalent in the population being tested, because there are more true positives relative to false positives.

Question 9: A physician in private practice wants to dismiss a patient from their practice. To avoid patient abandonment, the physician must:

Simply inform the patient they are no longer accepted
Dismiss immediately if the patient has been non-compliant
Obtain the patient's written consent to be dismissed
Provide adequate notice and continue emergency care during the transition period (Correct answer)

Correct answer: Provide adequate notice and continue emergency care during the transition period

Patient abandonment is avoided by giving sufficient written notice (typically 30 days), assisting with referrals, and continuing emergency care until care is transferred.

Question 10: Resource allocation in healthcare is governed primarily by which ethical principle?

Beneficence
Justice (Correct answer)
Non-maleficence
Autonomy

Correct answer: Justice

Justice requires fair distribution of healthcare resources, addressing equity across populations and ensuring access regardless of socioeconomic or demographic factors.

Question 11: Primary prevention refers to which level of public health intervention?

Early detection of disease before symptoms appear
Preventing disease before it occurs (e.g., vaccination, health education) (Correct answer)
Rehabilitation after disease or injury
Reducing complications of existing disease

Correct answer: Preventing disease before it occurs (e.g., vaccination, health education)

Primary prevention targets healthy populations to prevent the development of disease through measures such as immunizations, smoking cessation counseling, and safety promotion.

Question 12: Which US federal program provides health insurance coverage specifically for low-income individuals and families?

CHIP only
Medicare
Veterans Affairs (VA)
Medicaid (Correct answer)

Correct answer: Medicaid

Medicaid is a joint federal-state program providing health coverage to low-income adults, children, pregnant women, elderly, and people with disabilities based on income eligibility.

Question 13: Forest plots in meta-analyses display each study's result as a square with a horizontal line. What does the horizontal line represent?

The weight assigned to the study in the pooled analysis
The 95% confidence interval for that study's effect estimate (Correct answer)
The sample size of the study
The p-value of the study result

Correct answer: The 95% confidence interval for that study's effect estimate

In a forest plot, the horizontal line through each study's square extends to the upper and lower bounds of the 95% confidence interval for that study's effect size.

Question 14: What is the ethical distinction between withholding and withdrawing life-sustaining treatment?

Withdrawing treatment is always unethical
There is no ethical distinction; both are morally equivalent when informed consent is obtained (Correct answer)
Withholding is permissible but withdrawing is never allowed
Withdrawing requires a court order; withholding does not

Correct answer: There is no ethical distinction; both are morally equivalent when informed consent is obtained

Medical ethics and US law hold that withholding and withdrawing life-sustaining treatment are morally equivalent when consistent with the patient's informed wishes.

Question 15: Which feature best distinguishes Bipolar I disorder from Bipolar II disorder?

Presence of at least one major depressive episode
Hypomanic episodes lasting at least 4 days without a full manic episode
Rapid cycling between four or more mood episodes per year
At least one full manic episode lasting 7 or more days (Correct answer)

Correct answer: At least one full manic episode lasting 7 or more days

Bipolar I requires at least one full manic episode lasting ≥7 days (or any duration requiring hospitalization), while Bipolar II involves hypomania but never full mania.

Question 16: Which drug used for gout acts by inhibiting xanthine oxidase to reduce uric acid production?

Allopurinol (Correct answer)
Indomethacin
Colchicine
Probenecid

Correct answer: Allopurinol

Allopurinol inhibits xanthine oxidase, blocking conversion of hypoxanthine and xanthine to uric acid, thereby lowering serum urate levels.

Question 17: Statins exert their primary lipid-lowering effect by inhibiting which enzyme?

Lecithin-cholesterol acyltransferase
HMG-CoA reductase (Correct answer)
Lipoprotein lipase
Cholesterol ester transfer protein

Correct answer: HMG-CoA reductase

Statins competitively inhibit HMG-CoA reductase, the rate-limiting enzyme in hepatic cholesterol synthesis, reducing LDL-C levels.

Question 18: USPSTF recommends screening for lung cancer with low-dose CT (LDCT) in adults with what criteria?

Ages 55–80, 30 pack-year history, current smoker only
Ages 50–80, 20 pack-year smoking history, current smoker or quit within 15 years (Correct answer)
Ages 40–75, any tobacco exposure, current smoker only
All adults over age 45 with any smoking history

Correct answer: Ages 50–80, 20 pack-year smoking history, current smoker or quit within 15 years

The 2021 USPSTF recommendation expanded lung cancer screening to ages 50–80 with ≥20 pack-years who currently smoke or quit within 15 years.

Question 19: A 40-year-old woman with depression is started on fluoxetine. What is the primary mechanism of action of SSRIs?

Blockade of postsynaptic dopamine receptors
Inhibition of serotonin reuptake at the presynaptic terminal (Correct answer)
Stimulation of GABA-A receptors
Inhibition of monoamine oxidase

Correct answer: Inhibition of serotonin reuptake at the presynaptic terminal

SSRIs block the serotonin transporter (SERT), preventing reuptake of serotonin into the presynaptic neuron and increasing serotonin availability in the synaptic cleft.

Question 20: A patient on lithium develops nausea, tremor, and confusion. Which medication should be reviewed as a potential cause of lithium toxicity?

Diphenhydramine
Ibuprofen (NSAID) (Correct answer)
Amoxicillin
Acetaminophen

Correct answer: Ibuprofen (NSAID)

NSAIDs reduce renal prostaglandin synthesis, decreasing GFR and lithium clearance, which can rapidly elevate lithium levels to toxic concentrations.

Question 21: Myofascial release technique is primarily aimed at treating dysfunction in which tissue?

Bone cortex
Synovial membrane
Articular cartilage
Fascia and connective tissue (Correct answer)

Correct answer: Fascia and connective tissue

Myofascial release addresses restrictions in the fascial network to restore normal tissue mobility and relieve pain.

Question 22: Which approach to clinical decision-making integrates the best available research evidence with clinical expertise and patient values?

Intuitive diagnosis
Evidence-based medicine (EBM) (Correct answer)
Algorithmic medicine
Eminence-based medicine

Correct answer: Evidence-based medicine (EBM)

EBM as defined by Sackett integrates best research evidence, clinical expertise, and patient preferences and values into clinical decision-making.

Question 23: What does the word "osteopathy" mean?

A term derived from the Latin meaning "to heal with herbs."
Derived from Greek roots that refer to bone and disease (Correct answer)
A method of treating diseases through surgery.
A modern term for physical therapy.

Correct answer: Derived from Greek roots that refer to bone and disease

The word 'osteopathy' originates from Greek roots: 'osteon' meaning bone, and 'pathos' meaning suffering or disease. This etymology reflects the historical emphasis of osteopathic philosophy on the skeletal system and its role in health and illness. While modern osteopathy addresses the entire body, its name points to this foundational understanding.

Question 24: A systematic review that mathematically pools data from multiple RCTs to increase statistical power is called a:

Cohort synthesis
Scoping review
Narrative review
Meta-analysis (Correct answer)

Correct answer: Meta-analysis

Meta-analysis combines quantitative data from multiple studies using statistical methods to derive more precise pooled estimates of treatment effects.

Question 25: The number needed to treat (NNT) is calculated as:

Relative risk divided by baseline risk
1 / absolute risk reduction (ARR) (Correct answer)
Event rate in control group minus event rate in treatment group
1 / relative risk reduction (RRR)

Correct answer: 1 / absolute risk reduction (ARR)

NNT = 1/ARR; it tells clinicians how many patients must receive treatment for one additional patient to benefit compared to the control condition.

Question 26: Which screening test is recommended by the USPSTF for abdominal aortic aneurysm (AAA) in men aged 65–75 who have ever smoked?

One-time abdominal ultrasound (Correct answer)
Serum D-dimer measurement
Annual CT angiography
Annual abdominal ultrasound

Correct answer: One-time abdominal ultrasound

USPSTF recommends a one-time abdominal ultrasound for AAA screening in men aged 65–75 who have ever smoked (defined as ≥100 cigarettes lifetime).

Question 27: Is it a treatment only for bone diseases?

No, it is a complete therapeutic system, applicable in practically all classes of diseases. (Correct answer)
It is a form of alternative medicine for chronic conditions only.
It is only effective for joint pain.
Yes, it primarily focuses on bones and skeletal issues.

Correct answer: No, it is a complete therapeutic system, applicable in practically all classes of diseases.

No, osteopathy is not limited to treating bone diseases; it is a comprehensive therapeutic system. Osteopathic medicine views the body as an integrated unit where structure and function are interdependent. Therefore, osteopathic practitioners address a wide range of conditions by focusing on the body's self-healing mechanisms and the intricate relationships between all its systems, not just the skeletal system.

Question 28: The likelihood ratio positive (LR+) for a diagnostic test is calculated as:

Sensitivity / (1 - Specificity) (Correct answer)
(1 - Sensitivity) / Specificity
Sensitivity × Specificity
Positive predictive value / Negative predictive value

Correct answer: Sensitivity / (1 - Specificity)

LR+ = sensitivity / (1 – specificity), quantifying how much a positive test result increases the odds of disease relative to the pre-test probability.

Question 29: In diagnosing spinal somatic dysfunction, the convention 'L3 FRSL' means the vertebra is:

Flexed, rotated left, sidebent left (Correct answer)
Extended, rotated left, sidebent left
Flexed, rotated right, sidebent left
Flexed, rotated left, sidebent right

Correct answer: Flexed, rotated left, sidebent left

In OMM positional notation, F = flexed, R = rotated, S = sidebent, and the direction letter follows each motion descriptor.

Question 30: Which of the following is the first step in the assessment of a particular anatomical region?

Palpation - Sense somatic dysfunction through touch.
Passive range of motion - DO moves patient without assistance.
Active range of motion - Patient moves independently. (Correct answer)
Special tests - Orthopedic/neurological tests.

Correct answer: Active range of motion - Patient moves independently.

In the assessment of an anatomical region, observing the patient's active range of motion is the crucial first step. This allows the practitioner to evaluate how the patient moves independently, identify any pain or limitations they experience voluntarily, and gain initial insights into their functional capacity. It provides valuable information before the practitioner intervenes with passive movements or special tests.

Question 31: Type I spinal mechanics (Fryette's Law I) states that sidebending and rotation occur in which relationship when the spine is in neutral?

Rotation only, no sidebending
Random, not coupled
Same direction
Opposite directions (coupled) (Correct answer)

Correct answer: Opposite directions (coupled)

Fryette's Law I states that in the neutral spine, rotation and sidebending are coupled to opposite sides across multiple segments.

Question 32: What is the purpose of special tests in the assessment of an anatomical region?

To evaluate the patient's emotional response to pain.
To assess the integrity of ligaments, tendons, muscles, bones, and reflexes. (Correct answer)
To determine the passive range of motion of the joints.
To measure the patient’s ability to move independently.

Correct answer: To assess the integrity of ligaments, tendons, muscles, bones, and reflexes.

Special tests in an anatomical assessment are specifically designed to evaluate the integrity of various structures like ligaments, tendons, muscles, bones, and reflexes. These targeted maneuvers help confirm or rule out specific injuries or conditions that might not be apparent during general observation or range of motion assessments. They provide crucial diagnostic information to guide treatment.

Question 33: A 28-year-old woman reports recurrent, unexpected episodes of intense fear with palpitations, dyspnea, chest pain, and fear of dying peaking within 10 minutes. She now avoids crowded places. What is the most likely diagnosis?

Specific Phobia
Panic Disorder with Agoraphobia (Correct answer)
Generalized Anxiety Disorder
Social Anxiety Disorder

Correct answer: Panic Disorder with Agoraphobia

Panic Disorder with Agoraphobia presents with recurrent unexpected panic attacks plus avoidance of situations where escape might be difficult if an attack occurs.

Question 34: A pharmaceutical company offers a physician expensive gifts in exchange for prescribing their medication. This is an example of:

Routine continuing medical education support
Legal marketing under FDA guidelines
Conflict of interest violating professional ethics (Correct answer)
Acceptable industry-physician collaboration

Correct answer: Conflict of interest violating professional ethics

Receiving gifts that may influence prescribing creates a conflict of interest that compromises objectivity and patient-centered decision-making, violating AMA guidelines.

Question 35: Which of the following is NOT a characteristic of DIRECT technique procedures?

An example is the Muscle Energy Technique.
Apply some force to move the barrier in the direction of motion lost.
Avoid any interaction with the patient's discomfort. (Correct answer)
Engage the restrictive barrier.

Correct answer: Avoid any interaction with the patient's discomfort.

Direct technique procedures in osteopathic manipulative treatment involve engaging the restrictive barrier and applying force *into* that barrier in the direction of motion loss. This process inherently means the patient may experience some discomfort as the restriction is addressed. Therefore, avoiding any interaction with the patient's discomfort is not characteristic of direct techniques, unlike indirect techniques that move away from the barrier.

Question 36: A patient on lithium for bipolar disorder presents with coarse tremor, confusion, ataxia, and nausea. His serum lithium level is 2.1 mEq/L. What is the most appropriate immediate management?

Administer activated charcoal and a cathartic
Discontinue lithium and provide supportive care with hydration (Correct answer)
Add a low-dose antipsychotic to control symptoms
Increase the lithium dose to achieve therapeutic levels

Correct answer: Discontinue lithium and provide supportive care with hydration

Lithium toxicity (levels >1.5 mEq/L with symptoms) requires immediate discontinuation and supportive care; the therapeutic range is 0.6–1.2 mEq/L.

Question 37: A 30-year-old woman develops sudden paralysis of her left arm following a traumatic car accident. Neurological examination and brain MRI are normal. She appears surprisingly unconcerned about the deficit. What is the most likely diagnosis?

Factitious Disorder
Conversion Disorder (Functional Neurological Symptom Disorder) (Correct answer)
Malingering
Somatic Symptom Disorder

Correct answer: Conversion Disorder (Functional Neurological Symptom Disorder)

Conversion Disorder presents with neurological symptoms incompatible with known neurological disease, often following psychological stress, and may include la belle indifférence (apparent unconcern).

Question 38: Which of the following is an extensor, NOT a flexor of the knee joint?

Hamstrings
Quadriceps femoris (Correct answer)
Sartorius
Gastrocnemius

Correct answer: Quadriceps femoris

The quadriceps femoris is a powerful group of muscles located on the anterior (front) aspect of the thigh, and its primary action is to extend the knee joint. In contrast, the hamstrings and gastrocnemius are primarily knee flexors, and the sartorius also contributes to knee flexion. Thus, the quadriceps femoris is the correct answer for an extensor.

Question 39: What is the fundamental conception of osteopathy?

That all diseases can be treated with medication.
That diseases are primarily caused by infections.
That abnormal body functioning arises from structural defects, particularly a lack of free movement in joints near vital nerve roots. (Correct answer)
That mental health is the only consideration in physical ailments.

Correct answer: That abnormal body functioning arises from structural defects, particularly a lack of free movement in joints near vital nerve roots.

The fundamental conception of osteopathy is that abnormal body functioning often stems from structural defects, particularly restrictions in joint movement near vital nerve roots. This principle, established by A.T. Still, posits that structural integrity is essential for proper physiological function. By restoring free movement and addressing these structural impediments, osteopathy aims to enhance the body's natural healing processes.

Question 40: The US Preventive Services Task Force (USPSTF) recommends colorectal cancer screening beginning at what age for average-risk adults?

50 years
55 years
45 years (Correct answer)
40 years

Correct answer: 45 years

In 2021, the USPSTF updated its recommendation to begin colorectal cancer screening at age 45 for average-risk adults, lowered from the previous age of 50.

Question 41: Informed consent requires the physician to disclose which of the following elements?

Only the recommended treatment plan
Diagnosis, treatment options, risks, benefits, and alternatives (Correct answer)
Prognosis without mentioning risks
Risks only if the patient asks

Correct answer: Diagnosis, treatment options, risks, benefits, and alternatives

Valid informed consent requires disclosure of the diagnosis, proposed treatment, material risks and benefits, alternatives, and consequences of refusal.

Question 42: Mandatory reporting laws in the US require physicians to report which of the following to authorities?

Adult patients who smoke cigarettes
All cases of depression
Patients who are overweight
Suspected child abuse and neglect (Correct answer)

Correct answer: Suspected child abuse and neglect

All US states mandate that physicians report suspected child abuse and neglect to child protective services, overriding patient-physician confidentiality.

Question 43: Which antibiotic class is associated with QT prolongation and must be used cautiously in patients on antiarrhythmics?

Aminoglycosides
Fluoroquinolones (Correct answer)
Penicillins
Carbapenems

Correct answer: Fluoroquinolones

Fluoroquinolones (e.g., ciprofloxacin, levofloxacin) can prolong the QT interval, increasing the risk of torsades de pointes especially with other QT-prolonging drugs.

Question 44: Which advance directive specifically designates a person to make medical decisions for a patient who lacks capacity?

POLST form
Durable power of attorney for healthcare (Correct answer)
DNR order
Living will

Correct answer: Durable power of attorney for healthcare

A durable power of attorney for healthcare names a specific individual (healthcare proxy or agent) to make medical decisions when the patient cannot.

Question 45: An 80-year-old man develops acute onset confusion, disorientation, fluctuating consciousness, and visual hallucinations 2 days after hip surgery. His family confirms he was cognitively intact prior to hospitalization. What is the most appropriate initial management?

Identify and treat the underlying medical cause (Correct answer)
Administer haloperidol immediately to control agitation
Transfer to inpatient psychiatry for behavioral stabilization
Order an emergent EEG to rule out seizure activity

Correct answer: Identify and treat the underlying medical cause

Delirium is a medical emergency with a reversible underlying cause (infection, medications, metabolic disturbance, pain); identifying and treating the precipitating cause is always the first priority.

Question 46: Which anticoagulant requires no routine INR monitoring and acts by directly inhibiting thrombin (Factor IIa)?

Rivaroxaban
Warfarin
Dabigatran (Correct answer)
Apixaban

Correct answer: Dabigatran

Dabigatran (Pradaxa) is a direct thrombin inhibitor that does not require INR monitoring unlike warfarin, and has a predictable pharmacokinetic profile.

Question 47: A 32-year-old veteran presents with intrusive flashbacks, nightmares, hypervigilance, emotional numbing, and avoidance of combat-related stimuli persisting for 6 months post-deployment. What is the first-line pharmacological treatment?

Propranolol
Benzodiazepines
Sertraline or paroxetine (Correct answer)
Risperidone

Correct answer: Sertraline or paroxetine

SSRIs (sertraline and paroxetine) are the only FDA-approved medications for PTSD, and are recommended as first-line pharmacotherapy.

Question 48: Which statistical measure describes the strength of association between an exposure and outcome in a case-control study?

Hazard ratio (HR)
Number needed to harm (NNH)
Relative risk (RR)
Odds ratio (OR) (Correct answer)

Correct answer: Odds ratio (OR)

Case-control studies calculate the odds ratio because they sample based on outcome (case/control), making it impossible to calculate true incidence rates needed for relative risk.

Question 49: Which class of medications is first-line for managing hypertension in a patient with concurrent type 2 diabetes and proteinuria?

Calcium channel blockers
Thiazide diuretics
Beta-blockers
ACE inhibitors or ARBs (Correct answer)

Correct answer: ACE inhibitors or ARBs

ACE inhibitors and ARBs are first-line in diabetic patients with proteinuria because they reduce intraglomerular pressure and slow nephropathy progression.

Question 50: A physician uses motivational interviewing to help a patient with alcohol use disorder consider behavior change. Which principle best describes this therapeutic approach?

Confronting the patient directly about the negative consequences of their drinking
Eliciting and strengthening the patient's intrinsic motivation through a collaborative, patient-centered approach (Correct answer)
Setting behavioral contracts with defined consequences for relapse
Providing structured education about the medical dangers of alcohol consumption

Correct answer: Eliciting and strengthening the patient's intrinsic motivation through a collaborative, patient-centered approach

Motivational interviewing uses a collaborative, empathetic approach to elicit intrinsic motivation for change by exploring ambivalence, working with the patient's own values rather than imposing external pressure.

Question 51: A 28-year-old woman with bipolar disorder is planning pregnancy. Which mood stabilizer poses the GREATEST teratogenic risk?

Lamotrigine
Lithium
Quetiapine
Valproate (Correct answer)

Correct answer: Valproate

Valproate has the highest teratogenic risk among mood stabilizers, causing neural tube defects, cognitive impairment, and fetal valproate syndrome.

Question 52: Which structure is the primary focus of the Galbreath technique used in OMM?

Cervicothoracic junction
Sacroiliac joint
Mandible and eustachian tube drainage (Correct answer)
Lumbar facets

Correct answer: Mandible and eustachian tube drainage

The Galbreath mandibular drainage technique promotes eustachian tube drainage by tractioning the mandible to treat otitis media.

Question 53: The antidote for acetaminophen overdose, N-acetylcysteine (NAC), works by which mechanism?

Alkalinizing urine to enhance excretion
Replenishing glutathione stores to detoxify NAPQI (Correct answer)
Directly binding acetaminophen in the gut
Inhibiting CYP2E1 to reduce toxic metabolite formation

Correct answer: Replenishing glutathione stores to detoxify NAPQI

NAC provides cysteine for glutathione synthesis, replenishing hepatic stores depleted by NAPQI (the toxic acetaminophen metabolite) to prevent liver necrosis.

Question 54: Electroconvulsive therapy (ECT) is most appropriately indicated in which clinical scenario?

Schizophrenia with predominant negative symptoms
Mild depression not responding to lifestyle modifications
Severe treatment-resistant depression with acute suicidality or when medications are contraindicated (Correct answer)
Generalized Anxiety Disorder unresponsive to two SSRI trials

Correct answer: Severe treatment-resistant depression with acute suicidality or when medications are contraindicated

ECT is indicated for severe treatment-resistant depression, acute suicidality, catatonia, psychotic depression, or when rapid response is essential and medications are refused or contraindicated.

Question 55: In muscle energy technique (MET), the patient is asked to perform what action against a counterforce?

Rapid recoil
Isometric contraction (Correct answer)
Passive stretch
Isotonic contraction

Correct answer: Isometric contraction

MET requires the patient to perform an isometric contraction against the physician's unyielding counterforce to release somatic dysfunction.

Question 56: A 22-year-old man with schizophrenia has persistent auditory hallucinations and delusions despite adequate trials of two second-generation antipsychotics. Which medication is most appropriate for treatment-resistant schizophrenia?

Risperidone
Haloperidol
Clozapine (Correct answer)
Quetiapine

Correct answer: Clozapine

Clozapine is the only FDA-approved medication for treatment-resistant schizophrenia, defined as failure of at least two adequate antipsychotic trials.

Question 57: When a test has high specificity, a positive result is most useful for:

Ruling OUT disease
Confirming prognosis
Ruling IN disease (SpPin) (Correct answer)
Determining treatment dosage

Correct answer: Ruling IN disease (SpPin)

A highly specific test has few false positives, so a positive result strongly indicates true disease and is used to rule IN the diagnosis (SpPin mnemonic).

Question 58: The Still technique in OMM is best described as which type of combined approach?

Pure indirect positioning only
Purely passive craniosacral rhythm
Indirect followed by direct with a dynamic thrust (Correct answer)
Isotonic resistive exercise

Correct answer: Indirect followed by direct with a dynamic thrust

The Still technique first moves toward ease (indirect), then through the barrier with a dynamic corrective force.

Question 59: Which of the following is NOT a principle of the Strain/Counterstrain technique?

Somatic dysfunction has a neuromuscular basis.
It shortens the muscle containing the malfunctioning muscle spindle by applying mild strain to its antagonists.
It involves relieving spinal or joint pain by passively positioning the joint in its most comfortable position.
It focuses solely on aggressive manipulation of the joint. (Correct answer)

Correct answer: It focuses solely on aggressive manipulation of the joint.

The Strain/Counterstrain technique is an indirect osteopathic approach that focuses on relieving pain by passively positioning the joint or muscle in its most comfortable, shortened position. It specifically avoids aggressive manipulation, instead aiming to normalize neuromuscular reflexes by moving away from the restrictive barrier. Therefore, focusing solely on aggressive manipulation is not a principle of this gentle technique.

Question 60: A patient prescribed an SSRI for depression develops agitation, hyperthermia, and clonus after adding tramadol. What syndrome is occurring?

Malignant hyperthermia
Anticholinergic toxicity
Serotonin syndrome (Correct answer)
Neuroleptic malignant syndrome

Correct answer: Serotonin syndrome

Tramadol inhibits serotonin reuptake, and when combined with an SSRI, excessive serotonergic activity causes serotonin syndrome.

Question 61: A patient lacks decision-making capacity. Their legally designated healthcare proxy requests a treatment the physician believes is harmful. The physician should:

Override the proxy and treat the patient as the physician sees fit
Refuse to treat the patient
Negotiate with the proxy using the patient's best interests as the standard (Correct answer)
Follow the proxy's instructions without question

Correct answer: Negotiate with the proxy using the patient's best interests as the standard

The healthcare proxy must decide based on the patient's previously expressed wishes or best interests, and physicians may involve ethics committees if the proxy appears to deviate from this standard.

Question 62: Which dietary pattern is most strongly associated with reduced cardiovascular disease risk in evidence-based medicine?

Mediterranean diet (rich in fruits, vegetables, whole grains, olive oil, fish) (Correct answer)
BRAT diet (bananas, rice, applesauce, toast)
High-protein, low-carbohydrate ketogenic diet
Low-fat diet with unrestricted carbohydrates

Correct answer: Mediterranean diet (rich in fruits, vegetables, whole grains, olive oil, fish)

The Mediterranean diet has the strongest evidence base for cardiovascular risk reduction, including the landmark PREDIMED trial showing reduced major cardiac events.

Question 63: Under HIPAA, protected health information (PHI) may be disclosed without patient authorization for which purpose?

Public health reporting of communicable diseases (Correct answer)
Marketing by a pharmaceutical company
Sharing with the patient's employer
Research for a private company without IRB approval

Correct answer: Public health reporting of communicable diseases

HIPAA permits disclosure of PHI without authorization for public health activities such as reporting communicable diseases to state health departments.

Question 64: In epidemiology, incidence refers to:

The probability of death after disease diagnosis
New cases of a disease developing in a population over a defined time period (Correct answer)
Total existing cases of a disease at a point in time
The proportion of a population affected by a disease

Correct answer: New cases of a disease developing in a population over a defined time period

Incidence measures the rate of new disease occurrence in a previously unaffected population over a specific time period.

Question 65: What is osteopathy?

a modern medical practice that emphasizes manual manipulation and adjustments to promote the body’s natural healing processes, distinguishing it from traditional surgical or pharmaceutical approaches. (Correct answer)
A traditional form of medicine focused on herbal remedies.
A psychological approach to treating mental health disorders.
A surgical practice involving invasive procedures.

Correct answer: a modern medical practice that emphasizes manual manipulation and adjustments to promote the body’s natural healing processes, distinguishing it from traditional surgical or pharmaceutical approaches.

Osteopathy is a distinct medical practice that emphasizes the body's inherent ability to heal itself, primarily through manual manipulation and adjustments. It focuses on the interconnectedness of the body's systems, recognizing that structural integrity is crucial for overall health. This approach differentiates it from traditional medicine that might prioritize surgical or pharmaceutical interventions.

Question 66: Relative risk (RR) of 1.0 in an epidemiological study indicates:

The exposure halves the risk of disease
No association between exposure and outcome (Correct answer)
A 100% increase in disease risk
The exposure doubles the risk of disease

Correct answer: No association between exposure and outcome

RR = 1.0 means the risk in the exposed group equals the risk in the unexposed group, indicating no association between the exposure and outcome.

Question 67: An osteopathic physician finds a rib that is stuck in inhalation. In what position will this rib appear?

Neutral with normal excursion
Rotated but not elevated
Elevated and anterior (Correct answer)
Depressed and posterior

Correct answer: Elevated and anterior

A rib in inhalation dysfunction is held in an elevated, anterior position and resists moving to the depressed exhalation position.

Question 68: Confirmation bias in clinical diagnosis refers to:

Overestimating the prevalence of rare diseases
Anchoring on the first piece of diagnostic information
Seeking information that confirms an initial diagnosis while ignoring contradictory evidence (Correct answer)
Using recent memorable cases to guide diagnosis

Correct answer: Seeking information that confirms an initial diagnosis while ignoring contradictory evidence

Confirmation bias leads physicians to favor data supporting their initial hypothesis and discount findings that suggest an alternative diagnosis.

Question 69: Herd immunity is achieved when what proportion of a population is immune, preventing sustained transmission of an infectious disease?

100% of the population
At least 50% of the population regardless of disease
Only vaccinated individuals, excluding naturally immune
A threshold proportion sufficient to interrupt transmission chains (varies by disease) (Correct answer)

Correct answer: A threshold proportion sufficient to interrupt transmission chains (varies by disease)

Herd immunity thresholds vary by pathogen transmissibility (R0); measles requires ~95% immunity while polio requires ~80–85%.

Question 70: The Framingham Heart Study is an example of which epidemiological study design?

Retrospective case-control study
Cross-sectional survey
Randomized controlled trial
Prospective cohort study (Correct answer)

Correct answer: Prospective cohort study

The Framingham Heart Study followed a defined cohort over decades to identify risk factors for cardiovascular disease, making it a landmark prospective cohort study.

Question 71: Which modifiable risk factor is the leading preventable cause of death in the United States?

Tobacco use (Correct answer)
Excessive alcohol use
Obesity
Physical inactivity

Correct answer: Tobacco use

Tobacco use remains the leading preventable cause of death in the US, responsible for approximately 480,000 deaths annually from cancer, heart disease, and lung disease.

Question 72: In research ethics, the Belmont Report established which three core principles?

Truthfulness, beneficence, and non-maleficence
Autonomy, non-maleficence, and beneficence
Consent, privacy, and equity
Respect for persons, beneficence, and justice (Correct answer)

Correct answer: Respect for persons, beneficence, and justice

The 1979 Belmont Report identified respect for persons (autonomy), beneficence, and justice as the foundational principles guiding ethical human subjects research.

Question 73: Which of the following is NOT a correct definition of Somatic Dysfunction (SD)?

An alteration in the physiological function of the body's soft tissues and related structures.
A disturbance in the normal function of the body's musculoskeletal system.
A condition characterized by the complete absence of movement in a joint. (Correct answer)
Impaired or altered function of the somatic systems, including skeletal, arthrodial (joints), myofascial structures, and related vascular, lymphatic, and neural elements.

Correct answer: A condition characterized by the complete absence of movement in a joint.

Somatic Dysfunction (SD) refers to impaired or altered function of the body's somatic system, including musculoskeletal and related elements, characterized by a restriction or alteration in movement. It does not mean a complete absence of movement, which would indicate a more severe condition like ankylosis or fusion. SD describes a nuanced functional impairment rather than total immobility.

Question 74: A 55-year-old male smoker presents with hemoptysis and a new lung mass on CXR. The pre-test probability for lung cancer is estimated at 60%. The CT-guided biopsy has a sensitivity of 95% and specificity of 99%. A positive biopsy result essentially:

Confirms the diagnosis (very high post-test probability) (Correct answer)
Reduces the probability of malignancy
Is insufficient without PET scan correlation
Still requires additional testing before treatment

Correct answer: Confirms the diagnosis (very high post-test probability)

With high pre-test probability and a highly specific test showing a positive result, the post-test probability of malignancy approaches near certainty.

Question 75: A patient on an SSRI develops agitation, tremor, diaphoresis, hyperreflexia, and clonus within hours of adding tramadol. How does serotonin syndrome differ from Neuroleptic Malignant Syndrome?

NMS has clonus while serotonin syndrome has lead-pipe rigidity
NMS is caused by serotonergic agents; serotonin syndrome by antipsychotics
Serotonin syndrome has rapid onset with clonus; NMS has slower onset with lead-pipe rigidity (Correct answer)
They are clinically indistinguishable without laboratory testing

Correct answer: Serotonin syndrome has rapid onset with clonus; NMS has slower onset with lead-pipe rigidity

Serotonin syndrome has rapid onset (within hours), features clonus and hyperreflexia, and is caused by serotonergic drugs; NMS has slower onset over days, lead-pipe rigidity, and is caused by antipsychotics.

Question 76: Which beta-blocker is cardioselective (β1-selective) and preferred in patients with mild asthma requiring heart rate control?

Labetalol
Propranolol
Metoprolol (Correct answer)
Carvedilol

Correct answer: Metoprolol

Metoprolol is β1-selective and less likely to cause bronchospasm than nonselective agents like propranolol, though caution is still advised in asthma.

Question 77: When interpreting diagnostic tests, which situation should prompt concern about verification bias?

Disease status confirmed only in patients with positive screening tests (Correct answer)
All study participants receive the gold standard test regardless of screening result
Disease prevalence is evenly distributed across study groups
Random allocation to diagnostic pathways is used

Correct answer: Disease status confirmed only in patients with positive screening tests

Verification bias occurs when gold standard testing is applied selectively (e.g., only to positive screens), overestimating sensitivity and underestimating specificity.

Question 78: Which medication used for alcohol use disorder works by causing an aversive reaction when alcohol is consumed (disulfiram-like effect)?

Naltrexone
Disulfiram (Correct answer)
Acamprosate
Bupropion

Correct answer: Disulfiram

Disulfiram inhibits aldehyde dehydrogenase, causing acetaldehyde accumulation when alcohol is consumed, resulting in flushing, nausea, and tachycardia.

Question 79: The lymphatic pump technique is primarily used to enhance what physiological function?

Cerebrospinal fluid production
Lymphatic and immune circulation (Correct answer)
Arterial blood pressure
Bone marrow stimulation

Correct answer: Lymphatic and immune circulation

Lymphatic pump techniques rhythmically increase intrathoracic pressure to propel lymph through the lymphatic vessels and boost immune function.

Question 80: Which vaccine is recommended annually for all persons aged 6 months and older in the US?

Influenza vaccine (Correct answer)
Hepatitis B vaccine
MMR vaccine
Pneumococcal vaccine

Correct answer: Influenza vaccine

The CDC recommends annual influenza vaccination for everyone 6 months and older because influenza strains change each year and immunity wanes.

Question 81: Counterstrain technique positions the patient to achieve what primary effect?

Joint cavitation
Relief of tender point pain (Correct answer)
Lymphatic drainage
Fascial unwinding

Correct answer: Relief of tender point pain

Counterstrain places the patient in a position of comfort that shortens the offending muscle and relieves the tender point.

Question 82: Viscerosomatic reflexes cause somatic changes at which spinal levels for the liver and gallbladder?

L1–L4
C1–C4
T1–T4
T5–T9 (Correct answer)

Correct answer: T5–T9

The liver and gallbladder receive sympathetic innervation from T5–T9, making these levels the sites of viscerosomatic reflex changes.

Question 83: An adult patient reports longstanding difficulty sustaining attention, frequent task-switching, forgetfulness, and disorganization present since childhood that impairs occupational functioning. What is the first-line pharmacological treatment for adult ADHD?

Modafinil
Bupropion
Amphetamine salts or methylphenidate (Correct answer)
Atomoxetine

Correct answer: Amphetamine salts or methylphenidate

Stimulants (amphetamine salts or methylphenidate) are first-line pharmacological treatments for ADHD in both adults and children due to their superior efficacy.

Question 84: Soft tissue technique in OMM achieves its effect primarily through which mechanism?

Stretching and kneading muscles and fascia to reduce tension (Correct answer)
High-speed joint cavitation
Repositioning to shorten the muscle
Isometric patient contraction against resistance

Correct answer: Stretching and kneading muscles and fascia to reduce tension

Soft tissue technique uses sustained pressure, stretching, and kneading to lengthen hypertonic muscles and improve local circulation.

Question 85: In clinical practice, a decision threshold (test threshold) represents the probability at which:

All patients receive the same diagnostic workup
Testing is warranted based on pre-test probability and test risk/benefit (Correct answer)
Treatment should begin regardless of test results
Further testing always occurs regardless of current probability

Correct answer: Testing is warranted based on pre-test probability and test risk/benefit

The test threshold is the pre-test probability below which testing is unnecessary, while the treatment threshold is the probability above which treatment proceeds without testing.

Question 86: What is a Working Diagnosis?

A definitive diagnosis that is confirmed through extensive testing.
An irrelevant label placed on a patient without any clinical significance.
Likely causes for presenting signs and symptoms, including precipitating and maintaining factors. (Correct answer)
A temporary diagnosis based solely on patient history.

Correct answer: Likely causes for presenting signs and symptoms, including precipitating and maintaining factors.

A working diagnosis is an initial, provisional diagnosis based on the presenting signs and symptoms, including potential precipitating and maintaining factors. It serves as a guide for immediate management and further diagnostic steps, acknowledging that it may be refined or changed as more information becomes available. It represents the most likely explanation for the patient's condition at a given point.

Question 87: Which opioid analgesic is safest to use in patients with chronic kidney disease because it lacks active renally cleared metabolites?

Fentanyl (Correct answer)
Codeine
Hydromorphone
Morphine

Correct answer: Fentanyl

Fentanyl is metabolized to inactive compounds and does not accumulate in renal failure, making it safer than morphine whose active metabolite (M6G) can cause toxicity.

Question 88: Which osteopathic manipulative technique uses high-velocity, low-amplitude thrusts to restore joint mobility?

Counterstrain
High-velocity low-amplitude (HVLA) (Correct answer)
Myofascial release
Muscle energy technique (MET)

Correct answer: High-velocity low-amplitude (HVLA)

HVLA technique applies a rapid, controlled thrust through a joint's restrictive barrier to restore normal motion.

Question 89: A competent adult patient refuses a life-saving blood transfusion for religious reasons. The physician should:

Respect the refusal and provide alternative care (Correct answer)
Transfuse the patient against their will to save their life
Transfer the patient to another physician immediately
Seek a court order to override the decision

Correct answer: Respect the refusal and provide alternative care

A competent adult's right to refuse treatment, even life-saving treatment, is protected by the ethical principle of autonomy and upheld by US law.

Question 90: What is identified as the earliest and most common cause of disease according to the principle of osteopathic medicine?

Environmental factors.
Nutritional deficiencies.
Genetic predisposition.
A disturbance in the mechanical functioning of the body. (Correct answer)

Correct answer: A disturbance in the mechanical functioning of the body.

According to osteopathic principles, the earliest and most common cause of disease is identified as a disturbance in the mechanical functioning of the body. These mechanical dysfunctions, often called somatic dysfunctions, can impede the body's natural ability to heal and regulate itself. By addressing these structural and functional imbalances, osteopathic medicine aims to restore optimal health.

Question 91: Thiazide diuretics cause which electrolyte abnormality as a common side effect?

Hypernatremia
Hyperkalemia
Hypokalemia (Correct answer)
Hypercalcemia

Correct answer: Hypokalemia

Thiazides increase sodium and water excretion while also enhancing potassium secretion in the distal tubule, leading to hypokalemia.

Question 92: Anchoring bias in clinical decision-making occurs when a physician:

Orders too many unnecessary tests
Dismisses a diagnosis because it is rare
Relies too heavily on the first piece of clinical information and fails to adjust sufficiently (Correct answer)
Avoids uncertainty by defaulting to watchful waiting

Correct answer: Relies too heavily on the first piece of clinical information and fails to adjust sufficiently

Anchoring bias causes physicians to remain fixed on an initial impression even when subsequent information suggests a different diagnosis.

Question 93: Metformin is contraindicated in patients with an eGFR below what threshold due to risk of lactic acidosis?

30 mL/min/1.73m² (Correct answer)
15 mL/min/1.73m²
60 mL/min/1.73m²
45 mL/min/1.73m²

Correct answer: 30 mL/min/1.73m²

Metformin should be discontinued when eGFR falls below 30 mL/min/1.73m² because reduced renal clearance allows metformin accumulation and lactic acid buildup.

Question 94: Which occupational exposure is most strongly linked to mesothelioma?

Beryllium
Silica dust
Asbestos (Correct answer)
Coal dust

Correct answer: Asbestos

Asbestos exposure is the primary cause of mesothelioma, a malignant tumor of the pleura, peritoneum, or pericardium, with a latency period of 20–50 years.

Question 95: In a clinical study, internal validity refers to:

The reliability of the measuring instrument
Whether results can be generalized to other populations
The statistical power of the study
Whether the study results accurately reflect the true effect in the study population (Correct answer)

Correct answer: Whether the study results accurately reflect the true effect in the study population

Internal validity reflects how well the study design eliminates bias and confounding to establish that the observed association is real within the study population.

Question 96: According to Dr. Schleip, what factor contributes to the immediate tissue changes observed with techniques like Myofascial Release (MFR)?

The use of heat to relax the fascia before treatment.
Immediate fascial plasticity can be fully explained by the mechanical properties of the fascia.
The client's emotional state during the procedure.
The presence of a dense network of mechanoreceptors within the fascia. (Correct answer)

Correct answer: The presence of a dense network of mechanoreceptors within the fascia.

Dr. Schleip suggests that immediate tissue changes observed with techniques like Myofascial Release are significantly influenced by the dense network of mechanoreceptors within the fascia. These sensory receptors allow for rapid neurophysiological responses, influencing muscle tone and tissue stiffness through reflex pathways. This explains why changes can be felt almost immediately, rather than solely relying on the slower mechanical properties of fascial stretching.

Question 97: Sacral rocking in OMM is primarily used to treat dysfunction of which anatomical region?

Cranial vault
Rib cage
Cervical vertebrae
Sacrum and lumbosacral junction (Correct answer)

Correct answer: Sacrum and lumbosacral junction

Sacral rocking uses rhythmic anteroposterior motion to release restrictions in sacral motion and relieve lumbosacral tension.

Question 98: The legal doctrine of 'respondeat superior' means that in a medical malpractice case:

The burden of proof lies with the physician
An employer is liable for the negligent acts of employees acting within scope of employment (Correct answer)
Physicians are immune from lawsuits for emergency care
Expert testimony is not required to prove negligence

Correct answer: An employer is liable for the negligent acts of employees acting within scope of employment

Respondeat superior ('let the master answer') holds hospitals or physician employers vicariously liable for negligence committed by their employed staff.

Question 99: A 55-year-old woman presents with excessive worry about multiple life domains occurring more days than not for 8 months, with associated muscle tension, fatigue, and irritability. What is the minimum duration of symptoms required to diagnose Generalized Anxiety Disorder?

1 year
6 months (Correct answer)
2 weeks
1 month

Correct answer: 6 months

DSM-5 requires excessive anxiety and worry occurring more days than not for at least 6 months for a diagnosis of Generalized Anxiety Disorder.

Question 100: Clopidogrel is a prodrug that requires activation by which enzyme system to inhibit platelet aggregation?

CYP3A4
CYP1A2
CYP2C19 (Correct answer)
CYP2D6

Correct answer: CYP2C19

Clopidogrel is converted to its active thiol metabolite by CYP2C19; poor metabolizers (common in certain populations) have reduced platelet inhibition.

Question 101: A patient with alcohol use disorder is admitted for detoxification. During which timeframe after the last drink is the risk for alcohol withdrawal seizures highest?

6–24 hours after last drink
5–7 days after last drink
24–48 hours after last drink (Correct answer)
1–6 hours after last drink

Correct answer: 24–48 hours after last drink

Alcohol withdrawal seizures most commonly occur 24–48 hours after the last drink; delirium tremens typically peaks at 48–72 hours.

Question 102: A 35-year-old woman presents with persistent sadness, anhedonia, insomnia, fatigue, difficulty concentrating, and feelings of worthlessness for 3 weeks. What is the minimum number of symptoms required to diagnose Major Depressive Disorder per DSM-5?

7 symptoms for at least 2 weeks
4 symptoms for at least 1 week
5 symptoms for at least 2 weeks (Correct answer)
3 symptoms for at least 1 week

Correct answer: 5 symptoms for at least 2 weeks

DSM-5 requires at least 5 of 9 specified symptoms present for at least 2 weeks, with depressed mood or anhedonia being mandatory.

Question 103: What is the defining feature of a somatic dysfunction in OMM diagnosis?

Hyperreflexia, fasciculations, atrophy
Crepitus, pain, swelling, redness
Tissue texture change, asymmetry, restriction of motion, tenderness (TART) (Correct answer)
Fever, erythema, pus, warmth

Correct answer: Tissue texture change, asymmetry, restriction of motion, tenderness (TART)

Somatic dysfunction is identified by the TART criteria: Tissue texture abnormality, Asymmetry, Restriction of motion, and Tenderness.

Question 104: Bayes' theorem in clinical medicine states that the post-test probability of disease depends on which two factors?

Patient age and symptom duration
Sample size and confidence interval
Sensitivity and specificity alone
Pre-test probability and test likelihood ratio (Correct answer)

Correct answer: Pre-test probability and test likelihood ratio

Post-test probability integrates the pre-test probability (prevalence/clinical suspicion) with the test's likelihood ratio to determine how much a result changes disease probability.

Question 105: The principle of double effect permits the use of high-dose opioids for pain relief even if they may hasten death, provided that:

The patient has a terminal prognosis of less than 6 months
A palliative care specialist approves the dose
The primary intent is pain relief, not to hasten death (Correct answer)
The family gives consent in addition to the patient

Correct answer: The primary intent is pain relief, not to hasten death

Double effect permits an action with both good and harmful effects when the intent is the good effect (analgesia), the harmful effect is not the means to the good, and the good outweighs the harm.

Question 106: Which spinal region is most commonly associated with cardiac reflex changes via the Chapman's reflex point at the 2nd intercostal space?

T6–T12
T1–T5 (Correct answer)
L1–L3
C1–C3

Correct answer: T1–T5

Chapman's reflex points for cardiac function are found anteriorly at the 2nd intercostal space, reflecting T1–T5 viscerosomatic involvement.

Question 107: The femoropatellar joint is a ____ joint (sellar joint, articulation by reciprocal reception).

Saddle (Correct answer)
Ball-and-socket
Pivot
Hinge

Correct answer: Saddle

The femoropatellar joint, which is the articulation between the femur and the patella (kneecap), is classified as a saddle joint. This type of joint allows for movement in two planes, characterized by reciprocal concave and convex surfaces. This unique structure enables the patella to glide smoothly over the femoral trochlea during knee flexion and extension.

Question 108: Regarding the femorotibial joint, the meniscus is semicircular with its anterior end attaching to the anterior intercondylar area in front of the cruciate ligament.

Medial; Lateral
Lateral; Posterior
Lateral; Anterior
Medial; Anterior (Correct answer)

Correct answer: Medial; Anterior

Regarding the femorotibial joint, the medial meniscus is semicircular (C-shaped) and its anterior end attaches to the anterior intercondylar area of the tibia. This attachment point is specifically located in front of the anterior cruciate ligament (ACL). This anatomical relationship is crucial for the stability and proper biomechanics of the knee joint.

Question 109: Premature closure in diagnostic reasoning is best described as:

Performing too many diagnostic tests
Failing to consider the most common diagnoses first
Delaying diagnosis due to excessive testing
Accepting a diagnosis before all relevant information has been gathered (Correct answer)

Correct answer: Accepting a diagnosis before all relevant information has been gathered

Premature closure stops diagnostic inquiry once a plausible diagnosis is found, missing alternative or comorbid diagnoses that would have been revealed by further evaluation.

Question 110: Which of the following is the largest and most complicated articulation in the body?

Shoulder joint
Hip joint
Knee (Correct answer)
Elbow joint

Correct answer: Knee

The knee joint is widely recognized as the largest and most complicated articulation in the human body. It is a modified hinge joint that allows for flexion and extension, along with some rotational movements, and is stabilized by a complex network of ligaments, menisci, and muscles. Its intricate structure makes it susceptible to various injuries and conditions.

Question 111: In craniosacral therapy, the practitioner monitors the 'primary respiratory mechanism,' which has a normal rate of approximately how many cycles per minute?

20–30 cycles per minute
6–12 cycles per minute (Correct answer)
1–3 cycles per minute
12–20 cycles per minute

Correct answer: 6–12 cycles per minute

The craniosacral rhythm, reflecting the primary respiratory mechanism, normally oscillates at 6–12 cycles per minute.

Question 112: Which OMM technique is CONTRAINDICATED in a patient with acute disc herniation causing radiculopathy?

High-velocity low-amplitude (HVLA) (Correct answer)
Craniosacral therapy
Counterstrain
Lymphatic pump

Correct answer: High-velocity low-amplitude (HVLA)

HVLA is contraindicated with acute disc herniation because the thrust can worsen nerve compression and neurological deficits.

Question 113: Which of the four elements of malpractice must include proof that the physician's breach directly caused patient harm?

Duty
Breach
Damages
Causation (Correct answer)

Correct answer: Causation

Causation (both actual and proximate) requires proving that the physician's breach of the standard of care directly resulted in the patient's injury.

Question 114: Physician-assisted suicide is legal in which US states as of recent years?

All 50 states with terminal diagnosis confirmation
No US states; it is federally prohibited
Oregon, Washington, California, and several others under Death with Dignity laws (Correct answer)
Only in states without religious objection laws

Correct answer: Oregon, Washington, California, and several others under Death with Dignity laws

Multiple US states including Oregon (first, 1997), Washington, California, Colorado, and others have enacted Death with Dignity laws permitting physician-assisted dying under strict criteria.

Question 115: What is a systematic review (SR) paper and why is it helpful?

A document that lists all possible treatments for a condition without evaluating their effectiveness.
A collection of random opinions from various researchers.
The most reliable source of evidence to guide clinical practice, summarizing all available primary research in response to a research question. (Correct answer)
A single study that provides a narrow view of a specific topic.

Correct answer: The most reliable source of evidence to guide clinical practice, summarizing all available primary research in response to a research question.

A systematic review (SR) paper is considered the most reliable source of evidence for guiding clinical practice because it comprehensively summarizes all available primary research on a specific question. By systematically identifying, evaluating, and synthesizing findings from multiple studies, SRs minimize bias and provide a robust, evidence-based conclusion, offering a higher level of certainty than individual studies.

Question 116: A physician discovers that a colleague is impaired by substance use and posing a risk to patients. The physician's ethical obligation is to:

Confront the colleague privately but take no further action
Cover for the colleague to protect their career
Report the colleague to the appropriate authority or licensing board (Correct answer)
Ignore it unless a patient complains

Correct answer: Report the colleague to the appropriate authority or licensing board

Physicians have a professional duty to protect patients from harm, which requires reporting an impaired colleague to hospital administration or the state medical board.

Question 117: A patient taking warfarin is started on rifampin. How should warfarin dosing be adjusted?

Increase warfarin dose; rifampin induces CYP450 enzymes (Correct answer)
No adjustment needed
Decrease warfarin dose; rifampin inhibits CYP450 enzymes
Switch to heparin immediately

Correct answer: Increase warfarin dose; rifampin induces CYP450 enzymes

Rifampin is a potent CYP450 inducer that accelerates warfarin metabolism, reducing its anticoagulant effect and requiring a higher dose.

Question 118: Which type of study design provides the highest level of evidence for evaluating therapeutic interventions?

Cross-sectional study
Randomized controlled trial (RCT) (Correct answer)
Case-control study
Cohort study

Correct answer: Randomized controlled trial (RCT)

RCTs provide the strongest evidence by randomly allocating participants to intervention and control groups, minimizing selection bias and confounding.

Question 119: The anterior cruciate ligament arises from the and runs backward, upward, and to insert on to the lateral femoral condyle.

Tibia; Lateral (Correct answer)
Fibula; Posterior
Tibia; Medial
Femur; Medial

Correct answer: Tibia; Lateral

The anterior cruciate ligament (ACL) originates from the anterior intercondylar area of the tibia. From there, it runs backward, upward, and laterally to insert onto the medial surface of the lateral femoral condyle. This specific orientation is critical for preventing anterior translation of the tibia relative to the femur and limiting hyperextension of the knee.

Question 120: Which type of error occurs when a study fails to detect a true difference between groups because of insufficient sample size?

Type II error (beta error) (Correct answer)
Systematic bias
Random measurement error
Type I error (alpha error)

Correct answer: Type II error (beta error)

A Type II (beta) error is a false negative — failing to detect a real difference due to inadequate statistical power, often caused by too small a sample size.

Question 121: Which statistical test is most appropriate for comparing means of a continuous variable between two independent groups with normally distributed data?

ANOVA
Mann-Whitney U test
Independent samples t-test (Correct answer)
Chi-square test

Correct answer: Independent samples t-test

The independent samples t-test compares means of normally distributed continuous variables between two independent groups to test for statistically significant differences.

Question 122: A 95% confidence interval (CI) for a relative risk that does NOT cross 1.0 indicates:

The result is statistically significant at the p < 0.05 level (Correct answer)
The study had insufficient power
The result is clinically irrelevant
The effect size is too small to matter

Correct answer: The result is statistically significant at the p < 0.05 level

When a 95% CI for RR excludes 1.0 (no effect), the finding is statistically significant at the corresponding p < 0.05 threshold.

Question 123: A 17-year-old girl with anorexia nervosa (BMI 14) is hospitalized for nutritional rehabilitation. Which electrolyte abnormality is the most dangerous complication of refeeding and must be closely monitored?

Hypercalcemia
Hypophosphatemia (Correct answer)
Hyponatremia
Hyperkalemia

Correct answer: Hypophosphatemia

Refeeding syndrome causes rapid intracellular shift of phosphate with hypophosphatemia, which is the most dangerous complication and can lead to cardiac arrhythmias and respiratory failure.

Question 124: A physician is assessing suicide risk in a 45-year-old man with depression. Which factor is the single strongest predictor of completed suicide?

Verbal expression of suicidal ideation
Prior suicide attempt (Correct answer)
Diagnosis of Major Depressive Disorder
Social isolation

Correct answer: Prior suicide attempt

A prior suicide attempt is the single strongest predictor of future completed suicide, increasing risk approximately 30-40 times compared to the general population.

Question 125: The Zink patterns in fascial compensation describe alternating regions of fascial preference. Which pattern is considered the 'common compensatory pattern'?

All regions rotate right
OA left, CT right, TL left, LS right
OA right, CT left, TL right, LS left (Correct answer)
All regions rotate left

Correct answer: OA right, CT left, TL right, LS left

The common compensatory Zink pattern shows alternating fascial rotatory preferences: OA right, CT left, TL right, LS left.

Question 126: Which preventive intervention has the greatest impact on reducing infant mortality in the US?

Early introduction of solid foods
Safe sleep practices (back sleeping, firm mattress, no bed-sharing) (Correct answer)
Routine vitamin K injection at birth
Neonatal hearing screening

Correct answer: Safe sleep practices (back sleeping, firm mattress, no bed-sharing)

The 'Back to Sleep' campaign (now Safe to Sleep) dramatically reduced SIDS deaths by promoting supine infant sleeping position.

Question 127: A 25-year-old woman presents with intense fear of abandonment, markedly unstable relationships alternating between idealization and devaluation, identity disturbance, recurrent self-harm, and severe emotional lability. What is the most likely diagnosis?

Borderline Personality Disorder (Correct answer)
Antisocial Personality Disorder
Histrionic Personality Disorder
Narcissistic Personality Disorder

Correct answer: Borderline Personality Disorder

Borderline Personality Disorder is characterized by fear of abandonment, unstable relationships, identity disturbance, impulsivity, and recurrent self-harm or suicidal behavior.

Question 128: A 68-year-old man continues to experience intense longing, difficulty accepting his wife's death, and significant functional impairment 14 months after her passing. He does not meet criteria for Major Depressive Disorder. What is the most likely diagnosis?

Major Depressive Disorder
Adjustment Disorder
Prolonged Grief Disorder (Correct answer)
Normal bereavement

Correct answer: Prolonged Grief Disorder

Prolonged Grief Disorder (DSM-5-TR) is diagnosed when intense grief with functional impairment persists beyond 12 months in adults following bereavement.

Question 129: What is the definition of Fascial Plasticity according to Dr. Schleip (2003)?

The inability of fascia to change in response to physical stress.
The process of fascia becoming less flexible over time.
A type of muscle contraction that occurs in response to injury.
The ability of fascia to adapt to physical stress. (Correct answer)

Correct answer: The ability of fascia to adapt to physical stress.

According to Dr. Schleip, Fascial Plasticity refers to the ability of fascia to adapt and remodel in response to physical stress and mechanical loads over time. This concept highlights the dynamic nature of fascia, explaining how it can change its structure and stiffness. This adaptability is fundamental to understanding the long-term effects of manual therapies on fascial health.

Question 130: A 25-year-old woman presents for a well-woman visit. At what age does USPSTF recommend initiating cervical cancer screening with Pap smear?

21 years (Correct answer)
18 years
25 years
30 years

Correct answer: 21 years

USPSTF recommends beginning cervical cancer screening with cytology (Pap smear) alone at age 21, regardless of sexual activity onset.

Question 131: A patient taking haloperidol develops hyperthermia (40.5°C), severe lead-pipe muscle rigidity, altered consciousness, and autonomic instability. CPK is markedly elevated. What is this condition?

Serotonin Syndrome
Neuroleptic Malignant Syndrome (Correct answer)
Malignant Hyperthermia
Anticholinergic Toxicity

Correct answer: Neuroleptic Malignant Syndrome

Neuroleptic Malignant Syndrome is a life-threatening antipsychotic reaction presenting with hyperthermia, lead-pipe rigidity, altered consciousness, and autonomic instability with elevated CPK.

COMLEX-USA (Comprehensive Osteopathic Medical Licensing Examination)

The COMLEX-USA is the three-level licensing examination series administered by the NBOME for osteopathic physicians, testing medical knowledge, patient care, osteopathic principles, and manipulative treatment across biomedical and clinical sciences.

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35 min

Time Limit

70%

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