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Articles, Behavioral/Systems/Cognitive

A Retinal Source of Spatial Contrast Gain Control

Benjamin Scholl, Kenneth W. Latimer and Nicholas J. Priebe
Journal of Neuroscience 18 July 2012, 32 (29) 9824-9830; DOI: https://doi.org/10.1523/JNEUROSCI.0207-12.2012
Benjamin Scholl
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Kenneth W. Latimer
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Nicholas J. Priebe
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Abstract

Sensory cortex is able to encode a broad range of stimulus features despite a great variation in signal strength. In cat primary visual cortex (V1), for example, neurons are able to extract stimulus features like orientation or spatial configuration over a wide range of stimulus contrasts. The contrast-invariant spatial tuning found in V1 neuron responses has been modeled as a gain control mechanism, but at which stage of the visual pathway it emerges has remained unclear. Here we describe our findings that contrast-invariant spatial tuning occurs not only in the responses of lateral geniculate nucleus (LGN) relay cells but also in their afferent retinal input. Our evidence suggests that a similar contrast-invariant mechanism is found throughout the stages of the early visual pathway, and that the contrast-invariant spatial selectivity is evident in both retinal ganglion cell and LGN cell responses.

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The Journal of Neuroscience: 32 (29)
Journal of Neuroscience
Vol. 32, Issue 29
18 Jul 2012
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A Retinal Source of Spatial Contrast Gain Control
Benjamin Scholl, Kenneth W. Latimer, Nicholas J. Priebe
Journal of Neuroscience 18 July 2012, 32 (29) 9824-9830; DOI: 10.1523/JNEUROSCI.0207-12.2012

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A Retinal Source of Spatial Contrast Gain Control
Benjamin Scholl, Kenneth W. Latimer, Nicholas J. Priebe
Journal of Neuroscience 18 July 2012, 32 (29) 9824-9830; DOI: 10.1523/JNEUROSCI.0207-12.2012
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