Three-dimensional motion aftereffects reveal distinct direction-selective mechanisms for binocular processing of motion through depth
Three-dimensional motion aftereffects reveal distinct direction-selective mechanisms for binocular processing of motion through depth
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DOI：
10.1167/11.10.18
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发表时间：
2011-01-01
影响因子：
1.8
通讯作者：
Cormack, Lawrence K.
中科院分区：
文献类型：
--
作者：
Czuba, Thaddeus B.;Rokers, Bas;Cormack, Lawrence K.
运动后效历来被认为是神经元群体调节到特定运动方向的证据。尽管有大量的运动后效研究对2D(额面平行)运动机制进行了研究，但对于神经元群体通过深度选择运动方向(即，调整到3D运动)的心理物理学证据仍然非常缺乏。我们比较了双眼和单眼条件下长时间观看单向运动的效果，发现大量的3D运动后遗症不能用2D单眼后遗症的简单遗传来解释。这些结果(1)证明了与单眼2D机制不同的3D运动神经元的存在，(2)表明3D方向的选择性是由眼间速度差异和随时间变化的视差引起的，(3)为进一步探讨3D运动机制提供了一个直接的心理物理工具。
Motion aftereffects are historically considered evidence for neuronal populations tuned to specific directions of motion. Despite a wealth of motion aftereffect studies investigating 2D (frontoparallel) motion mechanisms, there is a remarkable dearth of psychophysical evidence for neuronal populations selective for the direction of motion through depth (i.e., tuned to 3D motion). We compared the effects of prolonged viewing of unidirectional motion under dichoptic and monocular conditions and found large 3D motion aftereffects that could not be explained by simple inheritance of 2D monocular aftereffects. These results (1) demonstrate the existence of neurons tuned to 3D motion as distinct from monocular 2D mechanisms, (2) show that distinct 3D direction selectivity arises from both interocular velocity differences and changing disparities over time, and (3) provide a straightforward psychophysical tool for further probing 3D motion mechanisms.