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Eccentricity has a major influence on cortico-cortical connectivity of areas V1, V2 and V4 in the macaque
Multiple Paper Presentation
Henry Kennedy
Unit 371 INSERM
Arnaud
Falchier
INSERM
Ken
Knoblauch
INSERM
Bertrand Jouve
Dept de Mathématiques et Informatique, University Toulouse 2 le Mirrail Abstract ID Number: 126
Abstract
Flow of information through the cortex is constrained by an as yet undetermined hierarchical organization of cortical areas. Recently we have characterized parameters of cortical pathways which indicate the hierarchical distance (Barone et al., 2000, J. Neurosci. 20; 3263-3281) between areas making it possible to obtain a determinate model of the visual system. In a first step we have a carried out statistical analysis of interareal connectivity which shows that hierarchical distance is a highly stable feature of interareal pathways. We have looked at how connectivity is influence by eccentricity. This shows important influences including inter-modal integration (Falchier et al., 2002, J. Neurosci. 22; 5749-5759) even at early cortical stages. Using graph theory we seek to obtain a determinate model of the visual system and the influence of eccentricity.
Barone, P., Batardiere, A., Knoblauch, K., and Kennedy, H. (2000). Laminar distribution of neurons in extrastriate areas projecting to visual areas V1 and V4 correlates with the hierarchical rank and indicates the operation of a distance rule. J Neurosci 20, 3263-3281.
Falchier, A., Clavagnier, S., Barone, P., and Kennedy, H. (2002). Anatomical evidence of multimodal integration in primate striate cortex. J Neurosci 22, 5749-5759.
To be Presented at the Following Symposium:
Contributions of Feedforward, Feedback and Lateral projections to Multisensory Convergence and Integration.
Other papers in this Symposium:
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