Orientation maps of subjective contours in visual cortex
Orientation maps of subjective contours in visual cortex
复制标题
DOI：
10.1126/science.274.5295.2110
复制
发表时间：
1996-12-20
期刊：
影响因子：
56.9
通讯作者：
Sur, M
中科院分区：
文献类型：
--
作者：
Sheth, BR;Sharma, J;Sur, M
本实验采用内源性信号光学成像和单单位记录技术，研究了成年猫视皮层V1和V2区对主观轮廓的反应。V1和V2都包含主观光栅的方向图，这些光栅的基础是对主观方向的特定种类的神经元反应。在V2中比在V1中更大比例的神经元显示出对主观边缘的鲁棒响应。通过使用主观刺激，其中亮度分量的方向是不变的，可以证明单独对主观边缘的未掩蔽的V1响应。这些数据表明，主观轮廓的处理早在V1开始，并在更高的皮层区域继续进行。
Responses to subjective contours in visual cortical areas V1 and V2 in adult cats were investigated by optical imaging of intrinsic signals and single-unit recording. Both V1 and V2 contain maps of the orientation of subjective gratings that have their basis in specific kinds of neuronal responses to subjective orientations. A greater proportion of neurons in V2 than in V1 show a robust response to subjective edges. Through the use of subjective stimuli in which the orientation of the luminance component is invariant, an unmasked V1 response to subjective edges alone can be demonstrated. The data indicate that the processing of subjective contours begins as early as V1 and continues progressively in higher cortical areas.