Motion perception under mesopic vision.
Motion perception under mesopic vision.
复制标题
中间视觉下的运动感知。
作者：
Yoshimoto;S.;Okajima;K.;Takeuchi;T.
中间视觉和暗视觉在10 - 6的照度范围内延伸。本研究的目的是确定降低光照水平对整合时空分离的运动信号的潜在运动机制的影响。为了实现这一点，我们利用了视觉运动启动的现象，其中一个方向模糊的测试刺激的感知方向是由前一个启动刺激的方向运动的影响。在终止漂移启动刺激之后，呈现180相移光栅作为测试刺激。启动和测试刺激分别呈现给中央和周边视网膜。受试者在从明视到暗视的各种光水平下判断该测试刺激的感知方向。我们发现，运动启动的影响消失超过1个对数单位的中间视觉光水平。当测试刺激之前提出的启动刺激的偏移，以补偿在杆路径的时间延迟，或当两个刺激都提出在相同的位置在外围，运动启动效应出现在中间光水平。这些结果表明，锥通路和杆通路之间的不同的时间特性干扰了假定的运动机制的功能，负责运动信号的时空整合，从而导致在广泛的中间视觉运动知觉的特定调制。
Mesopic and scotopic vision extend over an illuminance range of 10 6. The goal of the present study was to determine the effect of decreasing light level on the underlying motion mechanism that integrates spatiotemporally separated motion signals. To accomplish this, we took advantage of the phenomenon of visual motion priming, in which the perceived direction of a directionally ambiguous test stimulus is influenced by the directional movement of a preceding priming stimulus. After terminating a drifting priming stimulus, a 180 phase-shifted grating was presented as a test stimulus. The priming and test stimuli were separately presented to the central and peripheral retinas, respectively. The participants judged the perceived direction of this test stimulus at various light levels from photopic to scotopic levels. We found that the effects of motion priming disappeared over 1 log unit of mesopic light levels. When the test stimulus was presented before the offset of the priming stimulus to compensate for the temporal delay in the rod pathway or when both stimuli were presented at the same location in the periphery, a motion-priming effect appeared at mesopic light levels. These results suggest that different temporal characteristics between the cone pathway and rod pathway disturb the function of the putative motion mechanism responsible for the spatiotemporal integration of motion signals, which leads to specific modulation of motion perception over a wide range of mesopic vision.
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影响因子：
1.8
作者：
MURAKAMI, I;SHIMOJO, S
通讯作者：
SHIMOJO, S
视觉处理的三个阶段和两个系统。
影响因子：
--
作者：
G. Sperling
通讯作者：
G. Sperling
运动方向判断中的光适应。
影响因子：
1.9
作者：
T. Takeuchi;K. D. Valois;Isamu Motoyoshi
通讯作者：
Isamu Motoyoshi
幻影运动后遗症——用于光流分析的探测器的证据
影响因子：
9.2
作者：
R. Snowden;A. Milne
通讯作者：
A. Milne
影响因子：
1.8
作者：
DAWSON, M;DILOLLO, V
通讯作者：
DILOLLO, V