OCC OCC Neurological Assessment & Neuromuscular Medicine 3

Question 1

Within the first few hours of acute ischemic stroke, which imaging modality is most sensitive for detecting early infarction?

Accepted Answer

MRI with diffusion-weighted imaging (DWI)

Answer

Diffusion-weighted MRI detects cytotoxic edema (restricted diffusion) within minutes of ischemia onset, far earlier than CT or conventional MRI sequences.

Question 2

The vertebrobasilar (posterior) circulation primarily supplies which structures?

Accepted Answer

Brainstem, cerebellum, occipital lobes, and posterior thalamus

Answer

The vertebrobasilar system supplies the posterior fossa structures (brainstem and cerebellum) and posterior cerebral territories including the occipital lobes and posterior thalamus.

Question 3

Wallerian degeneration is defined as:

Accepted Answer

Anterograde degeneration of the axon and its myelin sheath distal to a site of injury

Answer

Wallerian degeneration describes the anterograde breakdown of the axon and associated myelin distal to a point of axonal transection, as the segment is separated from the neuronal cell body.

Question 4

In osteopathic medicine, the 'somatovisceral reflex' is best described as:

Accepted Answer

Somatic dysfunction altering visceral organ function via shared sympathetic spinal segments

Answer

The somatovisceral reflex describes how somatic dysfunction can alter visceral organ physiology through shared sympathetic afferent and efferent connections at the same spinal segment.

Question 5

Myasthenia gravis characteristically produces weakness that:

Accepted Answer

Worsens with repetitive use and improves with rest

Answer

Myasthenia gravis causes fatigable weakness that worsens with repetitive activity due to progressive depletion of acetylcholine at blocked neuromuscular junctions, and recovers with rest.

OCC - Osteopathic Continuous Certification Practice Test

OCC - Osteopathic Continuous Certification Practice Test

OCC OCC Neurological Assessment & Neuromuscular Medicine 3