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  Parallel processes may underly pattern motion perception

Li, Q., Logothetis, N., & Keliris, G. (2013). Parallel processes may underly pattern motion perception. Poster presented at Bernstein Conference 2013, Tübingen, Germany.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-4E53-B Version Permalink: http://hdl.handle.net/21.11116/0000-0001-51D4-4
Genre: Poster

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Li, Q1, 2, Author              
Logothetis, NK1, 2, Author              
Keliris, GA1, 2, Author              
Affiliations:
1Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              
2Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              

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 Abstract: Local measurements by small receptive fields induce ambiguous and noisy one-dimensional motion estimation. This problem can be overcome by selective integration or pooling over time and space to reconstruct the global pattern (Adelson Movshon, 1982). However, it remains unclear if the local signals from intersections could influence the global pattern motion perception. Many studies used multiple apertures in order to investigate motion integration over space (Alais, Van der Smagt, Van den Berg, Van de Grind, 1998; Maruya, Amano, Nishida, 2010; Mingolla, Todd, Norman, 1992; Takahashi, 2004), but none took this issue into consideration. Here we developed a novel stimulus and try to answer this question. We used a mask with multiple transparent apertures over a moving plaid. The plaid consisted of two overlapping moving gratings with directions 135° apart. The apertures were small (0.4°) and were placed in locations that allowed either only single contours (AP1) or intersections (AP2) to pass through. We hypothesized that if motion integration takes place only at higher stages with larger receptive fields, the probability of coherent pattern motion perception would not be affected by the relative ratios of the aperture types. Our results indicate that motion perception is largely affected by the ratio of aperture types. We conjecture that parallel processes at different stages are involved in motion integration.

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 Dates: 2013-09
 Publication Status: Published in print
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 Identifiers: DOI: 10.12751/nncn.bc2013.0125
BibTex Citekey: LiLK2013_2
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Title: Bernstein Conference 2013
Place of Event: Tübingen, Germany
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Title: Bernstein Conference 2013
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 128 - 129 Identifier: -