Attention modulates responses to motion reversals in human visual cortex

被引：2

作者：

Tata, Matthew S. ^{[1
]}

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

Sutherland, Robert J. ^{[1
]}

机构：

[1] Univ Lethbridge, Canadian Ctr Behav Neurosci, Lethbridge, AB T1J 3M4, Canada

来源：

NEUROREPORT | 2007年 / 18卷 / 13期

关键词：

attention; event-related potential; motion; MT; V5; vision;

D O I：

10.1097/WNR.0b013e328274213e

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Selective attention modulates brain responses in visual cortex. A common finding, using functional magnetic resonance imaging or event-related potentials, is that responses to attended relative to unattended stimuli are potentiated.We report an exceptional circumstance in a motion-processing paradigm. Participants viewed superimposed stationary and moving dots and were instructed to attend to one or the other subset. Changes in the direction of dot motion triggered an event-related potential over posterior scalp sites, with a prominent negative peak at 200 ms that was larger when attention was directed at the stationary dots. This effect was localized to extrastriate visual cortex and may be due to reflexive effects of attention orienting triggered by unattended peripheral motion.

引用

页码：1361 / 1365

页数：5