言語的及び非言語的弁別課題負荷による知覚的Laterality Differenceの移行

抄録

To investigate the functional relationship between the right and left hemispheres in normal subjects, the visual half-field difference in recognizing line orientation and Japanese letters were examined under the conditions of the verbal and nonverbal loads to both hemispheres. Line orientation was recognized more accurately in the left visual field under the nonverbal load, but this left field superiority disappeared under the verbal load. Letters were recognized more accurately in the right visual field under the verbal load, but this right field superiority decreased under the nonverbal load. The results were interpreted as indicating the functional organization between both hemispheres produced by the verbal or nonverbal load.