This study concerns about brain electrical activity during auditory stimulation in 2 aphasic patients, one with classical (left hemisphere lesion) and another with cross aphasia (right hemisphere lesion). Both cases were submitted to dichotic listening test (consonat-vowel-consonant task) and music audition (gregorian chant), during brain mapping examination. We found, in both cases, a great proportion in delta frequency and power in non-lesional hemisphere during dichotic and musical stimulation. Besides, increasing in frequency of alpha activity was observed only in the non-lesional hemisphere restricted to temporal lobe region. Such findings suggest an interesting field of research about measurements of neurophysiologies correlates of auditory stimulation and brain electrical activity in aphasia.
functional brain asymmetry; aphasia; computerized electroencephalographic mapping