A 55-Year-Old Right-Handed Man Arrives at the Emergency Department Complaining

A 55-year-old right-handed man arrives at the emergency department complaining of continuous right arm tingling and numbness for many hours. There is no headache, muscular weakness, slurred speech, or trouble walking in this patient. He has a history of hypertension, paroxysmal atrial fibrillation, and ischemic stroke, all of which have resolved. He was taken off anticoagulants two months ago after suffering a gastrointestinal hemorrhage. The blood pressure is 150/90 mm Hg, and the pulse rate is 92 beats per minute. During the examination, the patient's right arm paresthesia extends to the full right side of his body, and he experiences right-sided convulsions, which are followed by a bilateral tonic-clonic seizure. Which of the following structures in the left cerebral hemisphere is most likely to be the source of this patient's seizure?

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

Correct Answer:

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