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Human S-cone vision: Relationship between perceptive field and ganglion cell dendritic field

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Vassilev, A, Ivanov, I, Zlatkova, Margarita and Anderson, Roger (2005) Human S-cone vision: Relationship between perceptive field and ganglion cell dendritic field. JOURNAL OF VISION, 5 (10). pp. 823-833. [Journal article]

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DOI: 10.1167/5.10.6

Abstract

We measured the S-cone contrast threshold for stimuli of different size modulated along the white -90 deg direction in the isoluminant plane of DKL color space. The stimuli were presented at eccentricities of 5-30 deg in the horizontal temporal retinal meridian. Ricco's area of complete spatial summation was estimated using a bilinear fit of the log threshold/log area function. Ricco's area increased towards the retinal periphery to include an increasing number of S-cones while remaining 1.6-1.8 times larger than the dendritic field area of the small bistratified and parasol retinal ganglion cells. Assuming constant coverage factor by the dendritic field, Ricco's area incorporated a constant number ( three to four) of small bistratified cells. It was also found that the threshold contrast for stimuli that matched Ricco's area was constant across the studied eccentricity range, similar to previous findings for achromatic vision. Our data support the point of view that this invariance is the result of a constant number of cells involved in stimulus detection.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Vision
ID Code:3933
Deposited By:Dr Margarita Vidinova
Deposited On:09 Feb 2010 10:12
Last Modified:04 Aug 2011 09:51

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