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USMLE · Question #592
USMLE Question #592: Real Exam Question with Answer & Explanation
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Question
A 40-year-old male comes to his physician due to progressive muscle weakness and paralysis. Over the next few years, his condition progresses to complete paralysis of all voluntary muscles and he eventually dies of respiratory failure. Microscopic examination of tissue obtained at autopsy shows that both upper and lower motor neurons are degenerated. Of the listed options, the location which would likely reveal the most marked neuronal loss is the
Options
- Acaudate nucleus
- Bcerebellum
- Cglobus pallidus
- Dspinal cord
- Esubstantia nigra
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