[Verbal and nonverbal dichotic listening test. Influence of the hemispheric activation state in normal subjects].

The dichotomic listening test provides data for assessment of cerebral hemisphere activities in response to a given stimulus. Variations in results following verbal and non-verbal dichotomic listening tests to familiar sounds are described, as well as modifications when the activity of one or other hemisphere has been previously altered. Findings demonstrate that voluntary excentration of gaze modifies inter-hemispheric equilibrium and affects the results of the non-verbal dichotomic listening test.