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  • Title: Functional significance of individual variations in callosal area.
    Author: Yazgan MY, Wexler BE, Kinsbourne M, Peterson B, Leckman JF.
    Journal: Neuropsychologia; 1995 Jun; 33(6):769-79. PubMed ID: 7675166.
    Abstract:
    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 laterally and time-sharing capacity in normal adults suggest that the corpus callosum assumes a cross-excitatory role when subjects perform these tasks.
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