A 65-Year-Old Man Is Brought to the Emergency Department Due

A 65-year-old man is brought to the emergency department due to an acute change in mental status.  The patient was having dinner with his family when he suddenly had difficulty using his fork and appeared confused.  Other medical conditions include type 2 diabetes mellitus, hyperlipidemia, and hypertension.  The patient is a high school calculus teacher and has a 40-pack-year smoking history.  Blood pressure is 180/98 mm Hg and pulse is 98/min and regular.  On physical examination, the patient is well oriented, answers questions appropriately, and has no motor, sensory, or visual deficits.  He is unable to add simple numbers such as 17 plus 9; he is also unable to recognize or distinguish his fingers.  Which of the following brain areas is most likely affected in this patient?

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

Correct Answer:

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