Predicted contextual modulation varies with distance from pinwheel centers in the orientation preference map

Tsuyoshi Okamoto, Koji Ikezoe, Hiroshi Tamura, Masataka Watanabe, Kazuyuki Aihara, Ichiro Fujita

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In the primary visual cortex (V1) of some mammals, columns of neurons with the full range of orientation preferences converge at the center of a pinwheel-like arrangement, the 'pinwheel centerg' (PWC). Because a neuron receives abundant inputs from nearby neurons, the neuron's position on the cortical map likely has a significant impact on its responses to the layout of orientations inside and outside its classical receptive field (CRF). To understand the positional specificity of responses, we constructed a computational model based on orientation preference maps in monkey V1 and hypothetical neuronal connections. The model simulations showed that neurons near PWCs displayed weaker but detectable orientation selectivity within their CRFs, and strongly reduced contextual modulation from extra-CRF stimuli, than neurons distant from PWCs. We suggest that neurons near PWCs robustly extract local orientation within their CRF embedded in visual scenes, and that contextual information is processed in regions distant from PWCs.

Original languageEnglish
Article number114
JournalScientific reports
Volume1
DOIs
Publication statusPublished - Dec 1 2011

All Science Journal Classification (ASJC) codes

  • General

Fingerprint Dive into the research topics of 'Predicted contextual modulation varies with distance from pinwheel centers in the orientation preference map'. Together they form a unique fingerprint.

  • Cite this