Long distance communication in the human brain: timing constraints for inter-hemispheric synchrony and the origin of brain lateralization
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Date
2003
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Publisher
SOCIEDAD BIOLGIA CHILE
Abstract
Analysis of corpus callosum fiber composition reveals that inter-hemispheric transmission time may put constraints on the development of inter-hemispheric synchronic ensembles, especially in species with large brains like humans. In order to overcome this limitation, a subset of large-diameter callosal fibers are specialized for fast interhemispheric transmission, particularly in large-brained species. Nevertheless, the constraints on fast interhemispheric communication in large-brained species can somehow contribute to the development of ipsilateral, intrahemispheric networks, which might promote the development of brain lateralization.
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Keywords
axon, brain lateralization, corpus callosum, inter-hemispheric transfer, synchrony, vision, HUMAN CORPUS-CALLOSUM, GERBIL MERIONES-UNGUICULATUS, CAT VISUAL-CORTEX, AUDITORY-CORTEX, FUNCTIONAL-ORGANIZATION, FIBER COMPOSITION, MACAQUE MONKEYS, SEX-DIFFERENCES, CONNECTIONS, AREA-17