Hysteresis effects in stereopsis and binocular rivalry
Hysteresis effects in stereopsis and binocular rivalry
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DOI：
10.1016/j.visres.2007.12.013
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发表时间：
2008-03-01
期刊：
影响因子：
1.8
通讯作者：
Wilson, Hugh R.
中科院分区：
文献类型：
--
作者：
Buckthought, Athena;Kim, Jeounghoon;Wilson, Hugh R.
神经迟滞在立体视觉中起着重要作用，并揭示了皮层水平正反馈的存在[Wilson， h.r., & Cowan， J. D.(1973)]。皮层和丘脑神经组织功能动力学的数学理论。Kybernelik 13(2), 55-80]。我们测量了迟滞作为倾斜光栅的取向差异的函数，其中在立体视觉和双目竞争之间感知到过渡。图案由正弦光栅组成，取向差异(0度，1度，2度，…（40度）导致不同程度的倾斜。以每秒0.5、1或2个模式对的速度播放这41个模式对的电影，按正向或反向顺序播放。测量了两个过渡点：单个倾斜光栅似乎分裂成两个竞争光栅的点（T1），以及两个竞争光栅似乎合并成单个倾斜光栅的点（T2）。在不同的取向差异（T1 = 25.4度，T2 = 17.0度）下发生的转变与滞后一致，远远超过了反应时间的差异。结果与皮层模型一致，该模型包括代表不同眼睛和方向的神经单元之间的正反馈和反复抑制。(C) 2007 Elsevier Ltd.版权所有。
Neural hysteresis plays a fundamental role in stereopsis and reveals the existence of positive feedback at the cortical level [Wilson, H. R., & Cowan, J. D. (1973). A mathematical theory of the functional dynamics of cortical and thalamic nervous tissue. Kybernelik 13 (2), 55-80]. We measured hysteresis as a function of orientation disparity in tilted gratings in which a transition is perceived between stereopsis and binocular rivalry. The patterns consisted of sinusoidal gratings with orientation disparities (0 degrees, 1 degrees, 2 degrees,..., 40 degrees) resulting in various degrees of tilt. A movie of these 41 pattern pairs was shown at a rate of 0.5, 1 or 2 pattern pairs per second, in forward or reverse order. Two transition points were measured: the point at which the single tilted grating appeared to split into two rivalrous gratings (T1), and the point at which two rivalrous gratings appeared to merge into a single tilted grating (T2). The transitions occurred at different orientation disparities (T1 = 25.4 degrees, T2 = 17.0 degrees) which was consistent with hysteresis and far exceeded the difference which could be attributed to reaction time. The results are consistent with a cortical model which includes positive feedback and recurrent inhibition between neural units representing different eyes and orientations. (C) 2007 Elsevier Ltd. All rights reserved.