In Tan’s case, ten years after onset, which deficit occurred while comprehension remained intact?

• A. Right hemiparesis
• B. Left hemiparesis
• C. Aphasia with loss of comprehension
• D. Seizures

Answer: (A)

Left frontal lobe injury producing Broca’s aphasia shows impaired speech production while understanding remains intact. Because the motor pathways run through the same left hemisphere, the lesion can extend to corticospinal tracts and cause weakness on the opposite side of the body. Ten years after onset, Tan’s development of right-sided weakness fits a left-hemisphere motor deficit occurring alongside his preserved comprehension, which is characteristic of a Broca-type pattern. The other possibilities don’t match: left-sided weakness would imply right-hemisphere involvement; loss of comprehension would point to a receptive or global aphasia; seizures describe a different clinical picture.