Neural strength of visual attention gauged by motion adaptation
Neural strength of visual attention gauged by motion adaptation
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DOI：
10.1038/14814
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发表时间：
1999-11-01
影响因子：
25
通讯作者：
Blake, R
中科院分区：
文献类型：
--
作者：
Alais, D;Blake, R
单细胞和神经成像研究表明，注意力集中在一个视觉物体上，会显著放大由被关注物体的特征产生的神经活动。在一项心理物理研究中，我们发现视觉注意力可以调节弱运动信号的强度，以至于在视觉处理的早期假定记录的感知到的运动方向被强有力地改变。这种注意对早期运动加工的强烈影响，除了补充了视觉通路早期注意调制的神经生理学证据外，还可以用等效运动能量来衡量，从而为量化注意的影响提供了有用的度量。
Single-cell and neuroimaging studies reveal that attention focused on a visual object markedly amplifies neural activity produced by features of the attended object. In a psychophysical study, we found that visual attention could modulate the strength of weak motion signals to the point that the perceived direction of motion, putatively registered early in visual processing, was powerfully altered. This strong influence of attention on early motion processing, beside complementing neurophysiological evidence for attentional modulation early in the visual pathway, can be measured in terms of equivalent motion energy, and thus provides a useful metric for quantifying attention's effects.