Attention to Surfaces Modulates Motion Processing in Extrastriate Area MT
Attention to Surfaces Modulates Motion Processing in Extrastriate Area MT
复制标题
对表面的关注调节纹外区域的运动处理 MT
DOI：
10.1016/j.neuron.2007.05.001
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发表时间：
2007
期刊：
影响因子：
16.2
通讯作者：
W. Freiwald
中科院分区：
文献类型：
--
作者：
Aurel Wannig;V. Rodriguez;W. Freiwald
在视觉系统中，早期的原子化表征通过知觉组织过程被分组为更高层次的实体。在这里，我们提出了神经生理学的证据，一个简单的物体的表征，一个由颜色和运动定义的表面，可以在视觉处理的早期阶段的注意选择的单位。注视点的颜色提示猴子注意两个透明的随机点表面中的一个，一个是红色的，一个是绿色的，它们占据了相同的空间区域。被注意表面的运动比未被注意表面的运动对中颞叶视觉区神经元的驱动更强，即使两者都发生在注意聚光灯下。即使没有不同的表面颜色，基于表面的注意效应仍然存在，但颜色的注意调制更强。这些结果表明，注意早在皮层区MT时就可以选择表面表征来调节视觉加工。
In the visual system, early atomized representations are grouped into higher-level entities through processes of perceptual organization. Here we present neurophysiological evidence that a representation of a simple object, a surface defined by color and motion, can be the unit of attentional selection at an early stage of visual processing. Monkeys were cued by the color of a fixation spot to attend to one of two transparent random-dot surfaces, one red and one green, which occupied the same region of space. Motion of the attended surface drove neurons in the middle temporal (MT) visual area more strongly than physically identical motion of the nonattended surface, even though both occurred within the spotlight of attention. Surface-based effects of attention persisted even without differential surface coloring, but attentional modulation was stronger with color. These results show that attention can select surface representations to modulate visual processing as early as cortical area MT.
影响因子：
13.9
作者：
R. Desimone;J. Duncan
通讯作者：
R. Desimone;J. Duncan
影响因子：
1.7
作者：
POSNER, MI
通讯作者：
POSNER, MI