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| Research article summary (published 25 May 2009): |
Visual field map clusters in macaque extrastriate visual cortex.
Full Abstract
The macaque visual cortex contains >30 different functional visual areas, yet surprisingly little is known about the underlying organizational principles that structure its components into a complete "visual" unit. A recent model of visual cortical organization in humans suggests that visual field maps are organized as clusters. Clusters minimize axonal connections between individual field maps that represent common visual percepts, with different clusters thought to carry out different functions. Experimental support for this hypothesis, however, is lacking in macaques, leaving open the question of whether it is unique to humans or a more general model for primate vision. Here we show, using high-resolution blood oxygen level-dependent functional magnetic resonance imaging data in the awake monkey at 7 T, that the middle temporal area (area MT/V5) and its neighbors are organized as a cluster with a common foveal representation and a circular eccentricity map. This novel view on the functional topography of area MT/V5 and satellites indicates that field map clusters are evolutionarily preserved and may be a fundamental organizational principle of the Old World primate visual cortex.
Author information
Author/s: Kolster, Hauke (H); Mandeville, Joseph B (JB); Arsenault, John T (JT); Ekstrom, Leeland B (LB); Wald, Lawrence L (LL); Vanduffel, Wim (W);
Affiliation: Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA.
Grants: P41RR14075 (Agency:NCRR NIH HHS) ; R01-EB00790 (Agency:NIBIB NIH HHS) ; R01EB006847 (Agency:NIBIB NIH HHS)
Journal and publication information
Publication Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.
Journal: The Journal of neuroscience : the official journal of the Society for Neuroscience (J Neurosci), published in United States. (Language: eng)
Reference: 2009-May; vol 29 (issue 21) : pp 7031-9
Dates: Created 2009/05/28; Completed 2009/06/23; Revised 2009/09/24;
PMID: 19474330, status: MEDLINE (last retrieval date: 9/25/2009, IMS Date: )
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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