CFS Cognitive and Neurological Aspects of CFS 3

Question 1

The tilt table test is used in CFS assessment primarily to evaluate:

Accepted Answer

Orthostatic intolerance and autonomic nervous system function

Answer

Cognitive processing speed and accuracy

Answer

Respiratory function and oxygen utilization

Answer

Muscle strength and endurance

Question 2

Functional MRI (fMRI) studies during cognitive tasks in CFS patients typically show:

Accepted Answer

Altered or increased activation patterns suggesting compensatory neural recruitment

Answer

Identical brain activation to healthy controls

Answer

Complete absence of brain activation during cognitive tasks

Answer

Decreased activation exclusively in the prefrontal cortex

Question 3

The two-day cardiopulmonary exercise test (2-day CPET) in CFS specifically demonstrates:

Accepted Answer

Significant decline in performance on the second test day

Answer

Normal oxygen uptake on both test days

Answer

Improved performance on the second day due to an exercise stimulus

Answer

Identical results on both days, confirming deconditioning as the cause

Question 4

EEG (electroencephalography) abnormalities reported in CFS research include:

Accepted Answer

Abnormal slow-wave activity and reduced alpha power

Answer

Epileptiform discharges in the majority of patients

Answer

Complete normalization of brain activity during cognitive tasks

Answer

Absence of delta waves during all sleep stages

Question 5

Quantitative sensory testing (QST) in CFS research is used to measure:

Accepted Answer

Sensory thresholds and pain sensitivity

Answer

The extent of cognitive impairment

Answer

Autonomic nervous system responses to postural stress

Answer

Immunological markers of systemic inflammation

Question 6

Cerebrospinal fluid (CSF) analysis in CFS research has found which of the following in some patients?

Accepted Answer

Metabolomic and immune abnormalities compared to healthy controls

Answer

Bacterial pathogens in the majority of patients tested

Answer

Findings identical to healthy controls in all patients

Answer

Elevated protein levels indicating blood-brain barrier disruption in all patients

Question 7

Proprioceptive dysfunction in CFS refers to impaired ability to:

Accepted Answer

Perceive the position and movement of one's own body

Answer

Smell or taste properly

Answer

See clearly in low-light conditions

Answer

Process and respond to auditory stimulation