Receptive fields for smooth pursuit eye movements and motion perception
Receptive fields for smooth pursuit eye movements and motion perception
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DOI：
10.1016/j.visres.2010.09.034
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发表时间：
2010-12-01
期刊：
影响因子：
1.8
通讯作者：
Gegenfurtner, Karl R.
中科院分区：
文献类型：
--
作者：
Debono, Kurt;Schutz, Alexander C.;Gegenfurtner, Karl R.
为了准确地跟踪目标，必须将来自目标的运动信号从视觉背景中的运动信号中整合和分割出来。大多数关于追踪眼动的研究都是在无特征的背景下使用小的视觉目标，而忽略了我们自然视觉环境的要求。在这里，我们测试了追踪和感知系统的能力，刺激是包含水平运动信号的随机点运动图，该水平运动信号被空间局部周边运动信号扰动。扰动出现在注视相关坐标系中，并且具有与包括垂直分量的主运动不同的方向。状态追踪和感知受靠近主运动信号的扰动角的影响最大，并且仅在靠近注视中心的区域中。（半高全宽26度）和小空间范围（8度视角标准差）密切对应于中颞区（MT）神经元的调谐参数（C）2010 Elsevier Ltd版权所有
Humans use smooth pursuit eye movements to track moving objects of interest In order to track an object accurately motion signals from the target have to be integrated and segmented from motion signals in the visual context Most studies on pursuit eye movements used small visual targets against a featureless background disregarding the requirements of our natural visual environment Here we tested the ability of the pursuit and the perceptual system to integrate motion signals across larger areas of the visual field Stimuli were random-dot kinematograms containing a horizontal motion signal which was perturbed by a spatially localized peripheral motion signal Perturbations appeared in a gaze-contingent coordinate system and had a different direction than the main motion including a vertical component We measured pursuit and perceptual direction discrimination decisions and found that both steady-state pursuit and perception were influenced most by perturbation angles close to that of the main motion signal and only in regions close to the center of gaze The narrow direction bandwidth (26 angular degrees full width at half height) and small spatial extent (8 degrees of visual angle standard deviation) correspond closely to tuning parameters of neurons in the middle temporal area (MT) (C) 2010 Elsevier Ltd All rights reserved