Functional specialization in human dorsal pathway for stereoscopic depth processing
Functional specialization in human dorsal pathway for stereoscopic depth processing
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DOI：
10.1007/s00221-020-05918-4
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发表时间：
2020-09-04
影响因子：
2
通讯作者：
Fang, Fang
中科院分区：
文献类型：
--
作者：
Chen, Nihong;Chen, Zhimin;Fang, Fang
双目视差是立体深度知觉的主要线索，广泛存在于视皮层中。然而，视差处理网络中的功能专门化仍然不清楚。利用磁共振成像引导的经颅磁刺激，研究了V3A和MT+对立体深度知觉的因果贡献。受试者观看形成具有不同面间差异的透明平面的随机点立体图。他们的最小可检测视差和最大可检测视差在两个实验中被测量。我们发现，最小的可检测到的差异受V3A刺激的影响，但不受MT+刺激的影响。另一方面，V3A和MT+刺激同时影响可检测到的最大视差。我们的结果提示V3A和MT+在立体深度加工中的不同作用。
Binocular disparity, a primary cue for stereoscopic depth perception, is widely represented in visual cortex. However, the functional specialization in the disparity processing network remains unclear. Using magnetic resonance imaging-guided transcranial magnetic stimulation, we studied the causal contributions of V3A and MT+ to stereoscopic depth perception. Subjects viewed random-dot stereograms forming transparent planes with various interplane disparities. Their smallest detectable disparity and largest detectable disparity were measured in two experiments. We found that the smallest detectable disparity was affected by V3A, but not MT+ , stimulation. On the other hand, the largest detectable disparity was affected by both V3A and MT+ stimulation. Our results suggest different roles of V3A and MT+ in stereoscopic depth processing.