Spatial summation in the human fovea: Do normal optical aberrations and fixational eye movements have an effect?
Spatial summation in the human fovea: Do normal optical aberrations and fixational eye movements have an effect?
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人类中央凹的空间求和:正常的光学像差和注视眼球运动有影响吗?
DOI:
10.1167/18.8.6
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发表时间:
2018
影响因子:
1.8
通讯作者:
Morgan,JessicaIW
中科院分区:
文献类型:
--
作者:
Tuten,WilliamS;Cooper,RobertF;Tiruveedhula,Pavan;Dubra,Alfredo;Roorda,Austin;Cottaris,NicolasP;Brainard,DavidH;Morgan,JessicaIW
Psychophysical inferences about the neural mechanisms supporting spatial vision can be undermined by uncertainties introduced by optical aberrations and fixational eye movements, particularly in fovea where the neuronal grain of the visual system is fine. We examined the effect of these preneural factors on photopic spatial summation in the human fovea using a custom adaptive optics scanning light ophthalmoscope that provided control over optical aberrations and retinal stimulus motion. Consistent with previous results, Ricco's area of complete summation encompassed multiple photoreceptors when measured with ordinary amounts of ocular aberrations and retinal stimulus motion. When both factors were minimized experimentally, summation areas were essentially unchanged, suggesting that foveal spatial summation is limited by postreceptoral neural pooling. We compared our behavioral data to predictions generated with a physiologically-inspired front-end model of the visual system, and were able to capture the shape of the summation curves obtained with and without pre-retinal factors using a single postreceptoral summing filter of fixed spatial extent. Given our data and modeling, neurons in the magnocellular visual pathway, such as parasol ganglion cells, provide a candidate neural correlate of Ricco's area in the central fovea.
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影响因子:
1.8
作者:
Ratnam K;Domdei N;Harmening WM;Roorda A
通讯作者:
Roorda A
DOI:
10.1364/josaa.2.001508
发表时间:
1985-01-01
影响因子:
1.9
作者:
PELLI, DG
通讯作者:
PELLI, DG
影响因子:
1.8
作者:
GRUNERT, U;GREFERATH, U;WASSLE, H
通讯作者:
WASSLE, H
影响因子:
15.9
作者:
M. Rucci;J. Victor
通讯作者:
J. Victor
DOI:
10.1016/0278-4327(90)90009-7
发表时间:
1990-01-01
期刊:
Progress in Retinal Research
影响因子:
--
作者:
Kaplan, E.;Lee, B.B.;Shapley, R.M.
通讯作者:
Shapley, R.M.