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  Pattern motion signals from V1 receptive fields

Li, Q., Logothetis, N., & Keliris, G. (2013). Pattern motion signals from V1 receptive fields. Poster presented at 36th European Conference on Visual Perception (ECVP 2013), Bremen, Germany.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-4E69-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-5509-6
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 (RFs) in V1 are thought to induce ambiguous and noisy one-dimensional motion estimation. This necessitates integration at higher brain stages for computation of global pattern motion. Electrophysiological evidence from monkeys viewing plaid stimuli is consistent with this hypothesis finding a small percentage of cells in V1 responding to pattern motion but the percentage is increasing in higher motion responsive areas MT and MST. We conjectured that a subset of V1 RFs residing on specific stimulus features could directly respond to the pattern motion thus biasing motion integration at higher stages. We used a novel stimulus to mimic V1 RF responses to plaids. It comprised of a mask with multiple transparent apertures (0.4°) over a moving plaid. The aperture locations were chosen in advance to be of two types: AP1 were chosen to “see” only single grating components at any given time while AP2 were chosen to “see” only grating intersections. We manipulated the percentage of these two types in different trials to test how they influence motion perception. We found that the motion perception of subjects changes sigmoidally from 100 transparent when all apertures are AP1 to 100 coherent when all apertures are AP2.

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 Dates: 2013-08
 Publication Status: Published in print
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 Identifiers: DOI: 10.1177/03010066130420S101
BibTex Citekey: LiLK2013
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Title: 36th European Conference on Visual Perception (ECVP 2013)
Place of Event: Bremen, Germany
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Title: Perception
Source Genre: Journal
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Publ. Info: London : Pion Ltd.
Pages: - Volume / Issue: 42 (ECVP Abstract Supplement) Sequence Number: - Start / End Page: 145 Identifier: ISSN: 0301-0066
CoNE: /journals/resource/954925509369