The relationship between limb apraxia and the spontaneous use of communicative gesture in aphasia.

This study investigated the relationship between limb apraxia, as assessed by a formal clinical test, and the production of spontaneous communicative gesture, as measured by a newly designed rating scale--the Nonvocal Communication Scale (NCS). Subjects were aphasic adult males with cerebrovascular lesions of the left hemisphere. The performance of aphasic patients on the praxis test and the NCS was independent of demographic, neuroanatomic, linguistic, or cognitive variables, except for global aphasics who were low-scoring across the board. There was a significant positive correlation, however, between praxis ability and spontaneous gestural communication. Clinical implications of these findings are discussed.