| Color signals in the primary visual cortex of marmosets. | |
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MedLine Citation:
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PMID: 19146349 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study concerns the input from short-wavelength sensitive (S) cone photoreceptors to the primary visual cortex (striate cortex, Brodmann area 17, area V1) in marmosets. Signals from S-cones are thought to reach V1 by way of the koniocellular layers of the dorsal lateral geniculate nucleus. However, it is not known whether the S-cone afferent signals cause selective activation of cytochrome oxidase-rich cortical "blob" domains. To address this question, intrinsic optical signals and extracellular responses of V1 neurons were recorded. Stimuli consisted of drifting achromatic gratings and gratings that stimulated selectively either the S-cones or the medium-long wavelength sensitive (ML) cones. All stimuli produced contrast-dependent activation throughout the imaged regions of V1. The S- and ML-cone-selective stimuli produced activation levels of respectively 30% and 80% of that to achromatic gratings. No spatial variation in the strength of S-cone activation was apparent, and the ratio of S to ML activation was constant across all imaged regions. Consistently, in all of the single neurons recorded from V1, the functional input from S-cones was weaker than the input from ML-cones. We conclude that in the primary visual cortex of marmosets, S-cone signals are uniformly distributed. |
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Authors:
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Péter Buzás; Brett A Szmajda; Maziar Hashemi-Nezhad; Bogdan Dreher; Paul R Martin |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-10-22 |
Journal Detail:
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Title: Journal of vision Volume: 8 ISSN: 1534-7362 ISO Abbreviation: J Vis Publication Date: 2008 |
Date Detail:
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Created Date: 2009-01-16 Completed Date: 2009-05-05 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101147197 Medline TA: J Vis Country: United States |
Other Details:
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Languages: eng Pagination: 7.1-16 Citation Subset: IM |
Affiliation:
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National Vision Research Institute of Australia, Carlton, Australia. pbuzas@unimelb.edu.au |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Brain Mapping* Callithrix Color Perception / physiology* Electron Transport Complex IV / metabolism Female Geniculate Bodies / cytology, physiology Male Neurons / physiology Photic Stimulation Retinal Cone Photoreceptor Cells / cytology, physiology Visual Cortex / cytology, physiology* Visual Pathways / cytology, physiology* |
| Chemical | |
Reg. No./Substance:
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EC 1.9.3.1/Electron Transport Complex IV |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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