A 55-Year-Old Right-Handed Man Comes to the Emergency Department Due

A 55-year-old right-handed man comes to the emergency department due to persistent right arm tingling and numbness for the past several hours.  The patient has no headache, muscle weakness, slurred speech, or difficulty ambulating.  He has a history of hypertension, paroxysmal atrial fibrillation, and ischemic stroke without residual symptoms.  Anticoagulation was discontinued 2 months ago after he developed a gastrointestinal hemorrhage.  Blood pressure is 150/90 mm Hg, and pulse is 92/min and regular.  While the patient is being evaluated, his right arm paresthesia spreads to the entire right side of the body and he develops right-sided convulsions, followed by a bilateral tonic-clonic seizure.  Which of the structures in the left cerebral hemisphere is the most likely site of origin of this patient's seizure?

A) A
B) B
C) C
D) D
E) E
F) F

Correct Answer:

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