A model of non-linear interactions between cortical top-down and horizontal connections explains the attentional gating of collinear facilitation

被引：12

作者：

De Meyer, Kris ^{[1
]}

Spratling, Michael W. ^{[1
]}

机构：

[1] Kings Coll London, Div Engn, London WC2R 2LS, England

来源：

VISION RESEARCH | 2009年 / 49卷 / 05期

关键词：

Contrast detection; Contour integration; Lateral interactions; Attention; Perceptual grouping; Cortex; Neural network; Dendrites; PRIMARY VISUAL-CORTEX; NEOCORTICAL PYRAMIDAL NEURONS; ACTION-POTENTIAL INITIATION; CLASSICAL RECEPTIVE-FIELD; LATERAL INTERACTIONS; FUNCTIONAL ARCHITECTURE; CONTEXTUAL INFLUENCES; SPATIAL INTERACTIONS; BIASED COMPETITION; STRIATE CORTEX;

D O I：

10.1016/j.visres.2008.12.017

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Past physiological and psychophysical experiments have shown that attention can modulate the effects of contextual information appearing outside the classical receptive field of a cortical neuron. Specifically, it has been suggested that attention, operating via cortical feedback connections, gates the effects of long-range horizontal connections underlying collinear facilitation in cortical area V1. This article proposes a novel mechanism, based on the computations performed within the dendrites of cortical pyramidal cells, that can account for these observations. Furthermore, it is shown that the top-down gating signal into V1 can result from a process of biased competition occurring in extrastriate cortex. A model based on these two assumptions is used to replicate the results of physiological and psychophysical experiments on collinear facilitation and attentional modulation. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：553 / 568

页数：16

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