Neurodegenerative Diseases USMLE Step 1 Practice Question
A 33 year old woman is admitted after a severe motor vehicle collision with flexion injury to the thoracic spine. Neurologic examination shows bilateral flaccid paralysis below the lesion that later becomes spastic, absent pain and temperature sensation below the lesion, and preserved vibration and position sense. Which vascular territory or spinal cord region is most likely affected?
Answer choices
- AAnterior two thirds of the spinal cordCorrect answer
- BCauda equina
- CPosterior columns only
- DConus medullaris
- ERight hemicord
- FCentral cord (gray matter and adjacent white matter)
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