[Hemisphere dominance of cortical speech processing and its dynamics in the course of aphasia therapy. A psychophysiologic contribution to the discussion of the neuronal plasticity hypothesis].
Examinations of aphasic patients by using cognitive tasks were based on the hypothesis that semantically evoked potentials correlate to the processing of information in the cortical areas of Broca and Wernicke. Some of the examined right-handed patients with ischemic lesions of the left hemisphere produced characteristic potentials in the right temporal lobe, and not in the dominant left lobe as was expected. These case histories suggest that in these patients speech processing moved into the subdominant hemisphere as a result of compensation after cerebral damage by using the faculty of neuroplasticity. Furthermore an extended classification of aphasias is presented, illustrated by a three-parameter model.
Maier
R
R
Klinik für Kommunikationsstörungen, Universität Mainz, BRD.
Lünser
W
W
D000368:Aged; D001037:Aphasia / Q000503:physiopathology* / Q000534:rehabilitation; D002540:Cerebral Cortex / Q000503:physiopathology*; D004292:Dominance, Cerebral / Q000502:physiology*; D005072:Evoked Potentials, Auditory / Q000502:physiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009473:Neuronal Plasticity / Q000502:physiology*; D009483:Neuropsychological Tests; D013067:Speech Perception / Q000502:physiology*
Beobachtungen zur Hemisphärendominanz kortikaler sprachverarbeitender Prozesse und ihrer Dynamik im Verlaufe der Aphasietherapie. Ein psychophysiologischer Beitrag zur Diskussion der Neuroplastizitätshypothese.