| Responses of complex cells in cat area 17 to apparent motion of random pixel arrays. | |
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MedLine Citation:
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PMID: 9156181 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The characteristics of directionally selective cells in area 17 of the cat are studied using moving random pixel arrays (RPAs) with 50% white and 50% black pixels. The apparent motion stimulus is similar to that used in human psychophysics [Fredericksen et al. (1993). Vision Research, 33, pp. 1193-1205]. We compare motion sensitivity measured with single-step pixel lifetimes and unlimited pixel lifetimes. A motion stimulus with a single-step pixel lifetime contains directional motion energy primarily at one combination of spatial displacement and temporal delay. We recorded the responses of complex cells to different combinations of displacement and delay to describe their spatio-temporal correlation characteristics. The response to motion of RPAs with unlimited lifetime is strongest along the preferred speed line in a delay vs displacement size diagram. When using an RPA with a single-step pixel lifetime, the cells are responsive to a much smaller range of spatial displacements and temporal delays of the stimulus. The maximum displacement that still gives a directionally selective response is larger when the preferred speed of the cell is higher. It is on average about three times smaller than the receptive field size. |
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Authors:
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R J van Wezel; M J Lankheet; R E Fredericksen; F A Verstraten; W A van de Grind |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Vision research Volume: 37 ISSN: 0042-6989 ISO Abbreviation: Vision Res. Publication Date: 1997 Apr |
Date Detail:
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Created Date: 1997-06-23 Completed Date: 1997-06-23 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0417402 Medline TA: Vision Res Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 839-52 Citation Subset: IM; S |
Affiliation:
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Helmholtz Research Institute, Utrecht, The Netherlands. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Brain Mapping Cats Evoked Potentials, Visual Female Male Motion Perception / physiology* Optical Illusions / physiology Pattern Recognition, Visual / physiology* Time Factors Visual Cortex / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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