Etude tachistoscopique de la spécialisation hémisphérique chez l'agénésique du corps calleux.

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Abstract
Two siblings with total agenesis of the corpus callosum and matched IQ and normal controls were submitted to a hemispheric specialization task using tachistoscopic presentation of visual stimuli. No differences were found between acallosals and control subjects in terms of response accuracy. The agenic patients showed abnormally long reaction times and engaged more frequently in ocular scanning than control subjects. When a motor response was required, they displayed a left visual field superiority regardless of the stimulus nature. Results are discussed in terms of abnormal organization of hemispheric function in callosal agenesis.