| Temporal interactions in direction-selective complex cells of area 18 and the posteromedial lateral suprasylvian cortex (PMLS) of the cat. | |
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MedLine Citation:
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PMID: 16638175 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Temporal interactions in direction-sensitive complex cells in area 18 and the posteromedial lateral suprasylvian cortex (PMLS) were studied using a reverse correlation method. Reverse correlograms to combinations of two temporally separated motion directions were examined and compared in the two areas. A comparison to the first-order reverse correlograms allowed us to identify nonlinear suppression or facilitation due to pairwise combinations of motion directions. Results for area 18 and PMLS were very different. Area 18 showed a single type of nonlinear behavior: similar directions facilitated and opposite directions suppressed spike probability. This effect was most pronounced for motion steps that followed each other immediately and decreased with increasing delay between steps. In PMLS, the picture was much more diverse. Some cells exhibited nonlinear interactions, that were opposite to those in area 18 (facilitation for opposite directions and suppression for similar ones), while the majority did not show a systematic interaction profile. We conclude that nonlinear second-order reverse correlation characteristics reveal different functional properties, despite similarities in the first-order reverse correlation profiles. Directional interactions in time revealed optimal integration of similar directions in area 18, but motion opponency--at least in some cells--in PMLS. |
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Authors:
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Ildikó Vajda; Bart G Borghuis; Wim A van de Grind; Martin J M Lankheet |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Visual neuroscience Volume: 23 ISSN: 0952-5238 ISO Abbreviation: Vis. Neurosci. Publication Date: 2006 Mar-Apr |
Date Detail:
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Created Date: 2006-04-26 Completed Date: 2006-07-13 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8809466 Medline TA: Vis Neurosci Country: England |
Other Details:
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Languages: eng Pagination: 233-46 Citation Subset: IM |
Affiliation:
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Department of Functional Neurobiology and Helmholtz Institute, Utrecht University, Utrecht, The Netherlands. i.vajda@nih.knaw.nl |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Brain Mapping Cats Motion Perception / physiology* Neurons / physiology* Orientation / physiology* Photic Stimulation / methods Time Factors Visual Cortex / cytology*, physiology* Visual Pathways / cytology, physiology |
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