FUNCTIONAL-SIGNIFICANCE OF INDIVIDUAL VARIATIONS IN CALLOSAL AREA

NEUROPSYCHOLOGIA

卷:33

Article

YAZGAN, MY ; WEXLER, BE ; KINSBOURNE, M ; PETERSON, B ; LECKMAN, JF

关键词: CORPUS CALLOSUM;    LATERALITY;    LINE BISECTION;    DUAL TASK;    DICHOTIC LISTENING;   

DOI  :  10.1016/0028-3932(95)00018-X

来源: Elsevier

【 摘 要 】

We considered the hypothesis that the richness of callosal interhemispheric connections has a role in determining the degree of behavioural laterality and time-sharing ability in dual-task performance. Behavioural laterality as measured by dichotic word listening, line bisection and turning bias tests correlated inversely with the midsagittal cross-sectional area of the corpus callosum, as seen on MRI. The amount of dual task interference was strongly inversely correlated with the callosal area in both within-hemisphere and between-hemispheres conditions. These relationships between normal variations in callosal area, and outcomes on tests both of laterality and time-sharing capacity in normal adults suggest that the corpus callosum assumes a cross-excitatory role when subjects perform these tasks.

【 授权许可】

Free