Alais D, Blake R
Collège de France/LPPA, 11, place Marcelin Berthelot, 75005 Paris, France.
Nat Neurosci. 1999 Nov;2(11):1015-8. doi: 10.1038/14814.
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.
单细胞和神经成像研究表明，聚焦于视觉对象的注意力会显著增强由被关注对象的特征所产生的神经活动。在一项心理物理学研究中，我们发现视觉注意力可以调节微弱运动信号的强度，以至于在视觉处理早期可能被记录的运动感知方向会被有力地改变。注意力对早期运动处理的这种强烈影响，除了补充视觉通路早期注意力调制的神经生理学证据外，还可以根据等效运动能量来测量，因此为量化注意力的影响提供了一个有用的指标。
