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Journal Article  June 1, 2010

Contribution of Callosal Connections to the Interhemispheric Integration of Visuomotor and Cognitive Processes

SRI Authors Tilman Schulte

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Tilman Schulte, Eva M. Müller-Oehring."Contribution of Callosal Connections to the Interhemispheric Integration of Visuomotor and Cognitive Processes." Neuropsychology Review, June 2010, Volume 20, Issue 2, pp 174-190

 

Abstract

In recent years, cognitive neuroscience has been concerned with the role of the corpus callosum and interhemispheric communication for lower-level processes and higher-order cognitive functions. There is empirical evidence that not only callosal disconnection but also subtle degradation of the corpus callosum can influence the transfer of information and integration between the hemispheres. The reviewed studies on patients with callosal degradation with and without disconnection indicate a dissociation of callosal functions: while anterior callosal regions were associated with interhemispheric inhibition in situations of semantic (Stroop) and visuospatial (hierarchical letters) competition, posterior callosal areas were associated with interhemispheric facilitation from redundant information at visuomotor and cognitive levels. Together, the reviewed research on selective cognitive functions provides evidence that the corpus callosum contributes to the integration of perception and action within a subcortico-cortical network promoting a unified experience of the way we perceive the visual world and prepare our actions.

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