Local disparity not perceived depth is signaled by binocular neurons in cortical area V1 of the macaque
Local disparity not perceived depth is signaled by binocular neurons in cortical area V1 of the macaque
复制标题
DOI：
10.1523/jneurosci.20-12-04758.2000
复制
发表时间：
2000-06-15
影响因子：
5.3
通讯作者：
Parker, AJ
中科院分区：
文献类型：
--
作者：
Cumming, BG;Parker, AJ
与深度知觉密切相关的双眼神经元应该选择性地对引起适当深度感觉的刺激做出反应。为了将感知深度与感受野内的局部视差分离，在圆形孔径内呈现正弦亮度光栅。孔径的视差耦合到光栅的视差，从而使光栅的重复周期之间的心理物理匹配明确。在刺激差异相差光栅的一个水平周期的情况下，局部覆盖感受野的光栅部分是双眼相同的，但是深度感觉由于孔径而非常不同。在两只猴子身上测试的117个V1神经元中，绝大多数对局部相同但导致不同深度感知的配置反应同样良好。因为心理物理感觉并不反映在V1神经元的放电率中，所以使立体声匹配明确的信号最有可能是在纹外皮层中详细阐述的。
Binocular neurons that are closely related to depth perception should respond selectively for stimuli eliciting an appropriate depth sensation. To separate perceived depth from local disparity within the receptive field, sinusoidal luminance gratings were presented within a circular aperture. The disparity of the aperture was coupled to that of the grating, thereby rendering unambiguous the psychophysical matching between repeating cycles of the grating. In cases in which the stimulus disparity differs by one horizontal period of the grating, the portion of the grating that locally covers a receptive field is binocularly identical, but the depth sensation is very different because of the aperture. For 117 disparity-selective V1 neurons tested in two monkeys, the overwhelming majority responded equally well to configurations that were locally identical but led to different perceptions of depth. Because the psychophysical sensation is not reflected in the firing rate of V1 neurons, the signals that make stereo matches explicit are most likely elaborated in extrastriate cortex.