Movement Disorders USMLE Step 1 Practice Question
A 70-year-old man with hypertension and no prior stroke history presents with sudden onset wild flinging movements of his left arm and leg. Vital signs show BP 158/92 mmHg, HR 88/min, RR 16/min, temperature 37°C, SpO2 98% on room air. MRI reveals a small acute infarct in the right subthalamic nucleus. Serum glucose is 118 mg/dL. He denies sensory loss or weakness. Which of the following structures was most likely damaged?
Answer choices
- ACerebellar vermis
- BSubstantia nigra pars compacta
- CSubthalamic nucleusCorrect answer
- DRed nucleus
- ECaudate nucleus
- FGlobus pallidus internus
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