Cortical area MT and the perception of stereoscopic depth
Cortical area MT and the perception of stereoscopic depth
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DOI：
10.1038/29299
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发表时间：
1998-08-13
期刊：
影响因子：
64.8
通讯作者：
Newsome, WT
中科院分区：
文献类型：
--
作者：
DeAngelis, GC;Cumming, BG;Newsome, WT
立体视是一种基于两个视网膜上形成的图像之间的微小位置差异(称为双眼视差)的深度感知。选择性地对双眼视差做出反应的神经元最早是在30年前被描述的(1，2)，此后在灵长类动物大脑的许多视觉区域都观察到了这种神经元，包括V1，V2，V3，MT和MST3-8。虽然视差选择神经元被认为是立体视觉的神经基础，但视差选择神经元的存在并不能保证它们对立体深度知觉有贡献。一些视差选择神经元可能还有其他作用，如引导眼球运动(9，10)。因此，不同视觉区域在立体视觉中的作用仍然不明确。在这里，我们证明了视区MT在立体视觉中的重要性：电刺激视差选择性MT神经元簇可以偏差对深度的知觉判断，并且这种偏差可以从刺激部位神经元的视差偏好来预测。这些结果表明，MT中存在与立体深度有关的行为相关信号。
Stereopsis is the perception of depth based on small positional differences between images formed on the two retinae (known as binocular disparity). Neurons that respond selectively to binocular disparity were first described three decades ago(1,2), and have since been observed in many visual areas of the primate brain, including V1, V2, V3, MT and MST3-8. Although disparity-selective neurons are thought to form the neural substrate for stereopsis, the mere existence of disparity-selective neurons does not guarantee that they contribute to stereoscopic depth perception. Some disparity-selective neurons may play other roles, such as guiding vergence eye movementsg(9,10). Thus, the roles of different visual areas in stereopsis remain poorly defined. Here we show that visual area MT is important in stereoscopic vision: electrical stimulation of clusters of disparity-selective MT neurons can bias perceptual judgements of depth, and the bias is predictable from the disparity preference of neurons at the stimulation site. These results show that behaviourally relevant signals concerning stereoscopic depth are present in MT.