Eye position-dependent activity in the primary visual area as revealed by fMRI
Eye position-dependent activity in the primary visual area as revealed by fMRI
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DOI：
10.1002/hbm.20296
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发表时间：
2007-07-01
影响因子：
4.8
通讯作者：
Petit, Laurent
中科院分区：
文献类型：
--
作者：
Andersson, Frederic;Joliot, Marc;Petit, Laurent
眼睛在眼眶中的位置的内部感觉可能会影响考虑到注视和肢体定位以进行运动或引导动作的认知过程。神经影像学研究已经揭示了眼位置依赖的活动在纹外视觉，顶叶和额叶区，但在最早的视觉阶段，主要视觉区（V1）在这些过程中的作用仍然不清楚。功能性磁共振成像（fMRI）被用来调查的影响，眼睛的位置对V1活动诱发的四分之一场刺激，使用视觉棋盘。我们发现，V1活动的幅度调制的位置的眼睛，活动最大时，眼睛和头部的位置对齐。先前的研究推动了一种新的观点，即V1活动是一个皮层区域，其中发生了上下文的影响。目前的研究表明，眼睛的位置可能会影响视觉处理的早期阶段。
Internal senses of the position of the eye in the orbit may influence the cognitive processes that take into account gaze and limb positioning for movement or guiding actions. Neuroimaging studies have revealed eye position-dependent activity in the extrastriate visual, parietal, and frontal areas, but, at the earliest vision stage, the role of the primary visual area (V1) in these processes remains unclear. Functional MRI (fMRI) was used to investigate the effect of eye position on V1 activity evoked by a quarter-field stimulation using a visual checkerboard. We showed that the amplitude of V1 activity was modulated by the position of the eye, the activity being maximal when both the eye and head positions were aligned. Previous studies gave impetus to the emerging view that V1 activity is a cortical area in which contextual influences take place. The present study suggests that eye position may affect an early stage of visual processing.