Additional information about the central auditory discrimination ability of aphasics.

The differences of sensorimotor (global) and motor aphasias using electrophysiological recordings of cortical regions after different acoustic stimuli are described. For appreciation of the auditory perception ability of patients with aphasia slow auditory evoked potentials were recorded from temporal regions, after stimulation with tone, white noise, and word stimuli. For the global aphasia group (with speech comprehension lesion) normal cortical complexes were not recorded. These results could contribute to the discrimination of the two main types of aphasia (global and motor).