Gating of neuronal responses in macaque primary visual cortex by an attentional spotlight
作者:
T. Vidyasagar,
期刊:
NeuroReport
(OVID Available online 1998)
卷期:
Volume 9,
issue 9
页码: 1947-1952
ISSN:0959-4965
年代: 1998
出版商: OVID
关键词: Animal behaviour;Attentional spotlight;Feedback;Primary visual cortex;Primate;Single-neuron activity;Spatially directed attention
数据来源: OVID
摘要:
NEURONAL responses were recorded from the striate cortex of monkeys trained to perform visual discrimination at locations in the visual field to which their attention was drawn. A subset of neurons showed vigorous responses to visual stimuli for trials in which the monkey was directing its attention to the respective receptive field location. In trials where attention is directed elsewhere, responses to the same stimuli were significantly reduced. In some cells the early response component was not modulated by attention, but later components were affected by the locus of attention. The results suggest the operation of a feedback in the paradigm that spotlights a topographically restricted area of V1 for further processing at higher levels.
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