Treue S, Martínez Trujillo J C
Cognitive Neuroscience Laboratory, Department of Neurology, University of Tübingen, Germany.
Nature. 1999 Jun 10;399(6736):575-9. doi: 10.1038/21176.
Changes in neural responses based on spatial attention have been demonstrated in many areas of visual cortex, indicating that the neural correlate of attention is an enhanced response to stimuli at an attended location and reduced responses to stimuli elsewhere. Here we demonstrate non-spatial, feature-based attentional modulation of visual motion processing, and show that attention increases the gain of direction-selective neurons in visual cortical area MT without narrowing the direction-tuning curves. These findings place important constraints on the neural mechanisms of attention and we propose to unify the effects of spatial location, direction of motion and other features of the attended stimuli in a 'feature similarity gain model' of attention.
基于空间注意力的神经反应变化已在视觉皮层的许多区域得到证实，这表明注意力的神经关联是对被关注位置的刺激反应增强，而对其他位置的刺激反应减弱。在这里，我们展示了视觉运动处理中基于特征的非空间注意力调制，并表明注意力增加了视觉皮层MT区方向选择性神经元的增益，而不会使方向调谐曲线变窄。这些发现对注意力的神经机制提出了重要限制，我们建议在注意力的“特征相似性增益模型”中统一空间位置、运动方向和被关注刺激的其他特征的影响。
