NRCME Musculoskeletal System Assessment 3 — Questions and Answers
Question 1: A commercial driver is diagnosed with ankylosing spondylitis affecting the thoracic and lumbar spine. Which finding would be most relevant to the medical examiner's certification decision?
- Elevated ESR and CRP laboratory values
- Fused spine with severely limited spinal mobility affecting the ability to look over the shoulder (Correct answer)
- HLA-B27 positive genetic marker
- History of uveitis associated with the condition
Correct answer: Fused spine with severely limited spinal mobility affecting the ability to look over the shoulder
Spinal fusion with severely limited mobility in ankylosing spondylitis can restrict the cervical range of motion needed for safe blind-spot checking.
Question 2: Which of the following best describes a condition that would warrant referral to a specialist before issuing a medical certificate for musculoskeletal concerns?
- Mild bilateral knee crepitus without pain
- Progressive muscle weakness of unclear etiology affecting lower extremities (Correct answer)
- History of resolved plantar fasciitis
- A well-healed ankle fracture from 10 years prior with full functional recovery
Correct answer: Progressive muscle weakness of unclear etiology affecting lower extremities
Progressive lower extremity weakness of unclear cause requires specialist evaluation to rule out serious neurological or systemic disease before certification.
Question 3: A driver with rheumatoid arthritis is taking methotrexate and a biologic agent. What is the primary musculoskeletal concern the medical examiner should assess?
- Risk of drug-induced liver toxicity affecting alertness
- Joint inflammation, deformity, and functional limitations affecting vehicle control (Correct answer)
- Increased infection risk requiring annual vaccinations
- Risk of medication interactions with caffeine
Correct answer: Joint inflammation, deformity, and functional limitations affecting vehicle control
The medical examiner must assess joint function, deformity, and whether inflammation-related limitations impair safe vehicle operation.
Question 4: During a NRCME physical exam, a driver cannot fully extend the right knee due to a locked meniscal tear. How does this affect certification?
- It is irrelevant since automatic transmissions eliminate clutch use
- It may impair ability to depress brake and accelerator pedals safely, warranting further evaluation (Correct answer)
- The driver should be certified with a one-year restriction only
- Only the left knee is relevant to vehicle operation in the US
Correct answer: It may impair ability to depress brake and accelerator pedals safely, warranting further evaluation
A locked knee can impair the ability to fully depress and release brake/accelerator pedals, which is a direct safety concern for CMV operation.
Question 5: A driver reports intermittent shoulder dislocations of the right (dominant) arm. What is the primary concern for the medical examiner?
- Long-term risk of rotator cuff tear requiring eventual surgery
- Sudden loss of steering control during a dislocation event while driving (Correct answer)
- Reduced ability to lift cargo during loading operations
- Cosmetic deformity from recurrent dislocations
Correct answer: Sudden loss of steering control during a dislocation event while driving
Recurrent shoulder dislocation poses a risk of sudden incapacitation of steering control, creating a direct safety hazard during vehicle operation.
Question 6: Which tool is most appropriate to quantitatively assess grip strength during a NRCME musculoskeletal examination?
- Goniometer
- Pinch gauge
- Jamar dynamometer (Correct answer)
- Inclinometer
Correct answer: Jamar dynamometer
The Jamar dynamometer is the standard validated tool for measuring grip strength in clinical and occupational health settings.
Question 7: A commercial driver presents with a confirmed diagnosis of fibromyalgia. Which aspect is most relevant to the medical examiner's determination?
- The specific tender point count documented at diagnosis
- Whether associated fatigue, pain, or medications impair alertness and safe driving ability (Correct answer)
- Blood test results showing elevated inflammatory markers
- Whether the condition is classified as a disability under the ADA
Correct answer: Whether associated fatigue, pain, or medications impair alertness and safe driving ability
The examiner must assess whether fibromyalgia-related fatigue, widespread pain, or prescribed medications impair the driver's ability to safely operate a CMV.
NRCME Musculoskeletal System Assessment 3
A commercial driver is diagnosed with ankylosing spondylitis affecting the thoracic and lumbar spine.
Which finding would be most relevant to the medical examiner's certification decision?