Selective attention modulates electrical responses to reversals of optic-flow direction

被引：0

作者：

Tata, Matthew S. ^{[1
]}

Alam, Nazia ^{[2
]}

Mason, Aja L. O. ^{[1
]}

Christie, Gregory ^{[1
]}

Butcher, Andrew ^{[1
]}

机构：

[1] Univ Lethbridge, Dept Neurosci, Lethbridge, AB T1K 3M4, Canada

[2] Weill Cornell Med Coll, White Plains, NY 10605 USA

来源：

VISION RESEARCH | 2010年 / 50卷 / 08期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Attention; Attentional capture; Optic flow; Dorsal pathway; MT; ERP; Motion; Vision; VISUAL AREAS; MOTION-ONSET; SURFACES; OBJECT; COLOR; STRATEGIES; MOVEMENT; STIMULI; SLORETA; NOISE;

D O I：

10.1016/j.visres.2010.01.012

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Attended stimuli typically evoke larger event-related potentials (ERPs) than unattended stimuli. We previously reported an exception when an optic-flow pattern is interleaved with stationary dots. Reversals of motion direction evoked a larger N200 peak when attention was directed to the stationary dots. We replicated and further characterized this result: the N200 enhancement was eliminated when the dots moved randomly rather than in optic flow. The effect was also attenuated with isoluminant stimuli. Electrical source analysis suggested the attentional modulation of a configuration of dorsal extrastriate generators. The ERP evoked by reversals of optic flow may reflect the operation of independently configurable attentional filters within visual cortex. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：750 / 760

页数：11

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