Lesion localization in Broca's aphasia. Implications from Broca's aphasia without hemiparesis.

The recent hypothesis that injury of the left precentral gyrus (PCG) is critical in causing Broca's aphasia implies that right hemiparesis is an inevitable accompaniment of Broca's aphasia and not merely a coincidental neighborhood sign of PCG damage. A right-handed man was evaluated for posttraumatic Broca's aphasia. The absence in this case of limb or central facial weakness strongly suggests that language impairments of Broca's aphasia need not be associated with PCG damage.