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  Mixing of chromatic and luminance retinal signals in primate area V1.

Li, X., Chen, Y., Lashgari, R., Bereshpolova, Y., Swadlow, H. A., Lee, B. B., et al. (2015). Mixing of chromatic and luminance retinal signals in primate area V1. Cerebral Cortex, 25(7), 1920-1937. doi:10.1093/cercor/bhu002.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-78BD-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-1B9B-8
Genre: Journal Article

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 Creators:
Li, X., Author
Chen, Y., Author
Lashgari, R., Author
Bereshpolova, Y., Author
Swadlow, H. A., Author
Lee, B. B.1, Author              
Alonso, J. M., Author
Affiliations:
1Emeritus Group of Membrane Biophysics, MPI for Biophysical Chemistry, Max Planck Society, ou_1571137              

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Free keywords: koniocellular; magnocellular; parvocellular; receptive field; striate cortex
 Abstract: Vision emerges from activation of chromatic and achromatic retinal channels whose interaction in visual cortex is still poorly understood. To investigate this interaction, we recorded neuronal activity from retinal ganglion cells and V1 cortical cells in macaques and measured their visual responses to grating stimuli that had either luminance contrast (luminance grating), chromatic contrast (chromatic grating), or a combination of the two (compound grating). As with parvocellular or koniocellular retinal ganglion cells, some V1 cells responded mostly to the chromatic contrast of the compound grating. As with magnocellular retinal ganglion cells, other V1 cells responded mostly to the luminance contrast and generated a frequency-doubled response to equiluminant chromatic gratings. Unlike magnocellular and parvocellular retinal ganglion cells, V1 cells formed a unimodal distribution for luminance/color preference with a 2- to 4-fold bias toward luminance. V1 cells associated with positive local field potentials in deep layers showed the strongest combined responses to color and luminance and, as a population, V1 cells encoded a diverse combination of luminance/color edges that matched edge distributions of natural scenes. Taken together, these results suggest that the primary visual cortex combines magnocellular and parvocellular retinal inputs to increase cortical receptive field diversity and to optimize visual processing of our natural environment.

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Language(s): eng - English
 Dates: 2014-01-232015-07
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1093/cercor/bhu002
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Title: Cerebral Cortex
Source Genre: Journal
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Pages: - Volume / Issue: 25 (7) Sequence Number: - Start / End Page: 1920 - 1937 Identifier: -