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Title: A novel interhemispheric interaction : modulation of neuronal cooperativity in the visual areas
Authors: Carmeli, C 
Lopez-Aguado, L
Schmidt, KE
De Feo, O
Innocenti, GM
Issue Date: 2007
Publisher: Public Library of Science
Source: PLoS one, 2007, v. 2, no. 12, e1287 How to cite?
Journal: PLoS one 
Abstract: Background. The cortical representation of the visual field is split along the vertical midline, with the left and the right hemifields projecting to separate hemispheres. Connections between the visual areas of the two hemispheres are abundant near the representation of the visual midline. It was suggested that they re-establish the functional continuity of the visual field by controlling the dynamics of the responses in the two hemispheres.
Methods/principal findings. To understand if and how the interactions between the two hemispheres participate in processing visual stimuli, the synchronization of responses to identical or different moving gratings in the two hemi-fields were studied in anesthetized ferrets. The responses were recorded by multiple electrodes in the primary visual areas and the synchronization of local field potentials across the electrodes were analyzed with a recent method derived from dynamical system theory. Inactivating the visual areas of one hemisphere modulated the synchronization of the stimulus-driven activity in the other hemisphere. The modulation was stimulus-specific and was consistent with the fine morphology of callosal axons in particular with the spatio-temporal pattern of activity that axonal geometry can generate.
Conclusions/significance. These findings describe a new kind of interaction between the cerebral hemispheres and highlight the role of axonal geometry in modulating aspects of cortical dynamics responsible for stimulus detection and/or categorization.
EISSN: 1932-6203
DOI: 10.1371/journal.pone.0001287
Rights: © 2007 Carmeli et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
The following publication: Carmeli C, Lopez-Aguado L, Schmidt KE, De Feo O, Innocenti GM (2007) A Novel Interhemispheric Interaction: Modulation of Neuronal Cooperativity in the Visual Areas. PLoS ONE 2(12): e1287 is available at
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