A 68-Year-Old Man Is Evaluated for Visual Loss in the Left

A 68-year-old man is evaluated for visual loss in the left eye that resolved spontaneously within several hours.  The patient has a history of hypertension, type 2 diabetes mellitus, coronary artery disease, and ischemic cardiomyopathy.  He has smoked a pack of cigarettes daily for the past 40 years.  Physical examination reveals a left carotid bruit but no neurologic deficits.  A carotid duplex ultrasound shows 85% stenosis of the left internal carotid artery, and carotid angiography with stenting is performed.  During the procedure, atherosclerotic debris embolize to the artery shown (red arrow) on the cerebral magnetic resonance angiograph below. Which of the following actions is most likely to be impaired in this patient?

A) Climbing stairs
B) Gripping
C) Speaking
D) Swallowing food
E) Whistling

Correct Answer:

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