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Complex transcallosal interactions in visual cortex

Published online by Cambridge University Press:  02 June 2009

B.R. Payne ,
D.R. Siwek  and
S.G. Lomber
B.R. Payne
Affiliation:
Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston
D.R. Siwek
Affiliation:
Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston
S.G. Lomber
Affiliation:
Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston
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Abstract

Reversible inactivation by cooling of the transcallosal projecting neurons in areas 17 and 18 of one hemisphere bring about complex changes in the spontaneous and evoked activity of neurons in the callosal receiving zone of the opposite hemisphere. These changes include increase and decreases in evoked and spotaneous activities. Overall, 90% of neurons in alyers II and III, 50% in layer IV, and 100% in layers V and VI were affected by the block of transcallosal input. The complexity of the changes was greatest in layers II and III, which are the major callosal recipient layers. The results indicate that many excitatory and inhibitory circuits are under the direct control of transcallosal fibers in the normally fuctioning brain.

Keywords

Corpus callosumVisionInactivationArea 17Area 18
Type
Short Communication
Information
Visual Neuroscience , Volume 6 , Issue 3 , March 1991 , pp. 283 - 287
Copyright
Copyright © Cambridge University Press 1991

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