Hysteresis effects in stereopsis and binocular rivalry

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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.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2008-03
Language
English
Article Type
Article
Keywords

RANDOM-DOT STEREOGRAMS; HUMAN VISUAL SYSTEM; SPATIAL-FREQUENCY; COOPERATIVE PHENOMENA; NEURAL THEORY; DISPARITY; PERCEPTION; CONTRAST; FUSION; DYNAMICS

Citation

VISION RESEARCH, v.48, no.6, pp.819 - 830

ISSN
0042-6989
DOI
10.1016/j.visres.2007.12.013
URI
http://hdl.handle.net/10203/90595
Appears in Collection
HSS-Journal Papers(저널논문)
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