| Abstract: | EEG recordings were obtained from 10 normal and 10 aphasic adults while they participated in behavioral tasks and a no performance condition. Interhemispheric asymmetry and average activity at 5 to 15 Hz in each hemisphere were compared between groups and among tasks. Asymmetry during behavioral tasks did not differ significantly between groups or among tasks, however, aphasic patients showed a significant decrease in average activity at 5 to 15 Hz on the behavioral tasks compared with the level for a non performance condition. Test-retest reliability was poor for asymmetry but acceptable for average activity at 5 to 15 Hz. Finally, asymmetry was significantly related with severity of aphasia. |
