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Biological Research

Print version ISSN 0716-9760

Abstract

ABOITIZ, FRANCISCO; LOPEZ, JAVIER  and  MONTIEL, JUAN. Long distance communication in the human brain: timing constraints for inter-hemispheric synchrony and the origin of brain lateralization. Biol. Res. [online]. 2003, vol.36, n.1, pp.89-99. ISSN 0716-9760.  http://dx.doi.org/10.4067/S0716-97602003000100007.

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 inter-hemispheric transmission, particularly in large-brained species. Nevertheless, the constraints on fast inter-hemispheric communication in large-brained species can somehow contribute to the development of ipsilateral, intrahemispheric networks, which might promote the development of brain lateralization.

Keywords : axon; brain lateralization; corpus callosum; inter-hemispheric transfer; synchrony; vision.

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