A 68-Year-Old Man Is Tested for Left-Eye Vision Loss That

A 68-year-old man is tested for left-eye vision loss that improved spontaneously after several hours. The patient has a history of high blood pressure, type 2 diabetes, coronary artery disease, and ischemic cardiomyopathy. For the past 40 years, he has smoked a pack of cigarettes every day. A left carotid bruit is seen on physical examination, but no neurologic abnormalities are found. A carotid duplex ultrasound reveals an 85 percent blockage of the left internal carotid artery, prompting carotid angiography with stenting. Atherosclerotic material embolizes to the artery depicted (red arrow) on the cerebral magnetic resonance angiograph below during the treatment. 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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