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首页> 外文期刊>BMC Neuroscience >Early visual evoked potentials are modulated by eye position in humans induced by whole body rotations
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Early visual evoked potentials are modulated by eye position in humans induced by whole body rotations

机译：早期视觉诱发电位是由人体旋转引起的人眼位置调节的

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Background To reach and grasp an object in space on the basis of its image cast on the retina requires different coordinate transformations that take into account gaze and limb positioning. Eye position in the orbit influences the image's conversion from retinotopic (eye-centered) coordinates to an egocentric frame necessary for guiding action. Neuroimaging studies have revealed eye position-dependent activity in extrastriate visual, parietal and frontal areas that is along the visuo-motor pathway. At the earliest vision stage, the role of the primary visual area (V1) in this process remains unclear. We used an experimental design based on pattern-onset visual evoked potentials (VEP) recordings to study the effect of eye position on V1 activity in humans. Results We showed that the amplitude of the initial C1 component of VEP, acknowledged to originate in V1, was modulated by the eye position. We also established that putative spontaneous small saccades related to eccentric fixation, as well as retinal disparity cannot explain the effects of changing C1 amplitude of VEP in the present study. Conclusions The present modulation of the early component of VEP suggests an eye position-dependent activity of the human primary visual area. Our findings also evidence that cortical processes combine information about the position of the stimulus on the retinae with information about the location of the eyes in their orbit as early as the stage of primary visual area.
机译：背景技术要基于投射在视网膜上的图像来达到并抓住空间中的物体，需要进行不同的坐标转换，其中要考虑到视线和四肢的位置。眼球在眼眶中的位置会影响图像从视网膜视点（以眼睛为中心）的坐标转换为引导动作所需的以自我为中心的框架。神经影像学研究发现，沿视运动路径的视神经，顶叶和额叶区域的眼睛位置依赖性活动。在最早的视觉阶段，主要视觉区域（V1）在此过程中的作用仍不清楚。我们使用了基于模式发作视觉诱发电位（VEP）记录的实验设计来研究人眼位置对V1活性的影响。结果我们显示，VEP的初始C1分量的振幅（被确认起源于V1）受眼睛位置的调节。我们还建立了与偏心固定有关的推定的自发性小扫视以及视网膜差异不能解释本研究中VEP C1振幅改变的影响。结论目前对VEP早期成分的调节提示了人类主要视觉区域的眼睛位置依赖性活动。我们的发现还证明，皮质过程将有关视网膜上刺激位置的信息与有关眼睛在眼眶中的位置的信息早在主要视觉区域阶段结合在一起。

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