Spatial summation in the human fovea: the effect of optical aberrations and fixational eye movements
Spatial summation in the human fovea: the effect of optical aberrations and fixational eye movements
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人类中央凹的空间总和:光学像差和注视眼球运动的影响
DOI:
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
J. Morgan
中科院分区:
文献类型:
--
作者:
William S. Tuten;R. F. Cooper;Pavan Tiruveedhula;A. Dubra;A. Roorda;N. Cottaris;D. Brainard;J. Morgan
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 pre-neural 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 post-receptoral 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 post-receptoral 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.14.002884
发表时间:
1997-11-01
影响因子:
1.9
作者:
Liang, JZ;Williams, DR;Miller, DT
通讯作者:
Miller, DT
DOI:
10.1364/josaa.14.002477
发表时间:
1997-09-01
影响因子:
1.9
作者:
Pokorny, J;Smith, VC
通讯作者:
Smith, VC
影响因子:
16.6
作者:
Liu JK;Schreyer HM;Onken A;Rozenblit F;Khani MH;Krishnamoorthy V;Panzeri S;Gollisch T
通讯作者:
Gollisch T
DOI:
10.1364/josaa.19.002329
发表时间:
2002-12-01
影响因子:
1.9
作者:
Thibos, LN;Hong, X;Cheng, X
通讯作者:
Cheng, X