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This Article Full Text Full Text (PDF) All Versions of this Article: 92/5/2947    most recent 00281.2004v1 Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (10) Citing Articles via Google Scholar Google Scholar Articles by Carreira-Perpiñán, M. A. Articles by Goodhill, G. J. Search for Related Content PubMed PubMed Citation Articles by Carreira-Perpiñán, M. A. Articles by Goodhill, G. J.

Influence of Lateral Connections on the Structure of Cortical Maps

Department of Neuroscience, Georgetown University Medical Center, Washington, DC 20007

Submitted 22 March 2004; accepted in final form 2 June 2004

Maps of ocular dominance and orientation in primary visual cortex have a highly characteristic structure. The factors that determine this structure are still largely unknown. In particular, it is unclear how short-range excitatory and inhibitory connections between nearby neurons influence structure both within and between maps. Using a generalized version of a well-known computational model of visual cortical map development, we show that the number of excitatory and inhibitory oscillations in this interaction function critically influences map structure. Specifically, we demonstrate that functions that oscillate more than once do not produce maps closely resembling those seen biologically. This strongly suggests that local lateral connections in visual cortex oscillate only once and have the form of a Mexican hat.

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