Abstract
The report is based on matched data of 57 right-handed (RH) and 57 non-right-handed patients (NRH) with almost identical lesions in one cerebral hemisphere. The brain lesions were verified by post-mortem examination. It was found: (1) Aphasia occured in RH only on left cerebral lesions; (2) in NRH aphasia occured in patients with left and with right hemispheric damage; (3) the most transient aphasias were found in the NRH; (4) in all NRH patients agraphia and alexia occured significantly more frequently in lesions controlateral to the hand used for writing; (5) the cerebral areas affected by aphasia-producing lesions are not different in RH and NRH; (6) typical syndromes like Broca's, Wernicke's and total aphasia occured in both groups; (7) in the NRH there are significantly more unclassifiable aphasias than in the RH.
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