Which lesion location is classically associated with Broca's aphasia?

• A. Left posterior frontal
• B. Left temporal lobe
• C. Left occipital lobe
• D. Right frontal lobe

Answer: (A)

Broca's aphasia arises from damage to the dominant frontal language region, specifically the posterior inferior frontal gyrus near the frontal operculum. This area is essential for planning and programming the motor aspects of speech. When it’s injured, speech becomes nonfluent and labored, often telegraphic with short, agrammatic sentences, while comprehension is relatively preserved and repetition is impaired due to the motor speech deficit. This contrasts with lesions in the left temporal lobe, which produce Wernicke's aphasia (fluent but nonsensical speech with poor comprehension), and with occipital lobe or right frontal lesions that don’t produce the classic Broca’s aphasia pattern. Therefore, the left posterior frontal region is the classic site associated with Broca's aphasia.