| The nature of V1 neural responses to 2D moving patterns depends on receptive-field structure in the marmoset monkey. | |
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MedLine Citation:
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PMID: 12711710 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A plaid pattern is formed when two sinusoidal gratings of different orientations are added together. Previous work has shown that V1 neurons selectively encode the direction and orientation of the component gratings in a moving plaid but not the direction of the plaid itself (Movshon et al. 1985). We recorded the responses of 49 direction-selective neurons to moving gratings and plaid patterns in area V1 of the anesthetized marmoset monkey (Callithrix jacchus). The responses of V1 neurons to rectangular patches of varying lengths and widths containing gratings of optimal spatial frequency were used to measure size and aspect ratio of the receptive-field subunits. We measured responses to plaid patterns moving in different directions and graded the magnitude of the response to the direction of motion of the plaid and the response to the direction of motion of the component gratings. We found significant correlations between receptive-field structure and the type and strength of its response to moving plaid patterns. The strength of pattern and component responses was significantly correlated with the interrelated properties of direction tuning width (Spearman's r = 0.82, P < 0.001), and receptive-field subunit aspect ratio (Spearman's r = -0.79, P < 0.001). Neurons with broad direction tuning and short, wide receptive-field subunits gave their greatest response when the plaid moved in their preferred direction. Conversely, neurons with narrow direction tuning and long, narrow receptive-field subunits gave their greatest responses when the plaid moved in a direction such that one of its components moved in the preferred direction. |
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Authors:
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Chris J Tinsley; Ben S Webb; Nick E Barraclough; Chris J Vincent; Amanda Parker; Andrew M Derrington |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2003-04-23 |
Journal Detail:
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Title: Journal of neurophysiology Volume: 90 ISSN: 0022-3077 ISO Abbreviation: J. Neurophysiol. Publication Date: 2003 Aug |
Date Detail:
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Created Date: 2003-08-07 Completed Date: 2003-10-01 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0375404 Medline TA: J Neurophysiol Country: United States |
Other Details:
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Languages: eng Pagination: 930-7 Citation Subset: IM |
Affiliation:
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School of Psychology, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Callithrix* Electrophysiology Female Male Motion Perception / physiology* Neurons / physiology* Orientation / physiology Photic Stimulation Visual Cortex / physiology* Visual Fields / physiology* Visual Perception / physiology |
| Comments/Corrections | |
Erratum In:
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J Neurophysiol. 2004 Aug;92(2):1263 |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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