TY - JOUR
T1 - Surround contribution to light adaptation in cat retinal ganglion cells.
AU - Enroth‐Cugell, C.
AU - Lennie, P.
AU - Shapley, R. M.
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1975/6/1
Y1 - 1975/6/1
N2 - 1. The sensitivity of a cat's retinal ganglion cell to a small, dim, spot flashed upon the middle of the receptive field depends upon the size of a concentric steady background: sensitivity is reduced monotonically with background area. All backgrounds which equal or exceed in size the central summing area of the ganglion cell produce an equivalent reduction of sensitivity, even though only backgrounds which extend outside the central summing area depress the maintained discharge. 2. If a small background lies upon the middle of the receptive field, and the test spot is made intense enough to evoke a strong response, steady illumination of the periphery may make the response larger. 3. This change in response is not due to an enhancement of centre sensitivity by the surround, but is readily understood if steady illumination of the periphery adapts out the surround's antagonism of the centre's response to the test flash. 4. The failure of steady stimulation of the surround to alter centre sensitivity implies that signals from the surround subtract from, or add to, those from the centre.
AB - 1. The sensitivity of a cat's retinal ganglion cell to a small, dim, spot flashed upon the middle of the receptive field depends upon the size of a concentric steady background: sensitivity is reduced monotonically with background area. All backgrounds which equal or exceed in size the central summing area of the ganglion cell produce an equivalent reduction of sensitivity, even though only backgrounds which extend outside the central summing area depress the maintained discharge. 2. If a small background lies upon the middle of the receptive field, and the test spot is made intense enough to evoke a strong response, steady illumination of the periphery may make the response larger. 3. This change in response is not due to an enhancement of centre sensitivity by the surround, but is readily understood if steady illumination of the periphery adapts out the surround's antagonism of the centre's response to the test flash. 4. The failure of steady stimulation of the surround to alter centre sensitivity implies that signals from the surround subtract from, or add to, those from the centre.
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U2 - 10.1113/jphysiol.1975.sp010948
DO - 10.1113/jphysiol.1975.sp010948
M3 - Article
C2 - 1142302
AN - SCOPUS:0016688736
SN - 0022-3751
VL - 247
SP - 579
EP - 588
JO - The Journal of Physiology
JF - The Journal of Physiology
IS - 3
ER -