A 66-Year-Old, Right-Handed Man Is Brought to the Emergency Department

A 66-year-old, right-handed man is brought to the emergency department due to left-sided numbness and weakness.  The patient woke with left-hand clumsiness that rapidly progressed to profound left-sided weakness, affecting the left arm more than the left leg.  He has a history of hypertension and has smoked a pack of cigarettes daily for the past 40 years.  Blood pressure is 175/90 mm Hg and pulse is 82/min and regular.  Neurologic examination reveals impaired touch discrimination in the left arm with left facial weakness sparing the forehead, 2/5 muscle strength in the left upper limb, and 4/5 muscle strength in the left lower limb.  Right-sided strength and visual field examinations are normal.  Which of the following labeled arteries is most likely occluded in this patient?

A) A
B) B
C) C
D) D
E) E
F) F
G) G
H) H
I) I
J) J

Correct Answer:

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