Adjacent visual representations of self-motion in different reference frames
Adjacent visual representations of self-motion in different reference frames
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DOI：
10.1073/pnas.1102984108
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发表时间：
2011-07-12
影响因子：
11.1
通讯作者：
van den Berg, Albert V.
中科院分区：
文献类型：
--
作者：
Arnoldussen, David Mattijs;Goossens, Jeroen;van den Berg, Albert V.
最近的研究表明，当四处移动时，视网膜运动不能直接用于感知[Souman JL，et al.（2010）J维斯10：14]，这可能指向运动区域中视网膜速度敏感性的抑制。在这里，我们研究了视网膜为中心和头部为中心的自我旋转表示在人类低层视觉运动领域的分布。功能性MRI反应进行了测量，以一组视觉自我运动刺激与不同水平的模拟凝视和模拟头部旋转。血氧水平依赖性反应的参数广义线性模型分析显示，V3区，V6（+）区，中颞区，内侧上级颞区，特别是由旋转流的速度相对于眼睛和头部的调制的子区域。在这些区域还发现了联系两个参照系的追踪信号。据我们所知，这些结果是第一次证明在这些领域的自我运动的多种视觉表征。这种相邻表示的存在指向视觉自运动信号的参考系的早期变换和低阶运动敏感区域中的视觉参考系的地形。这表明，视觉决定的行动和感知可能会考虑到视网膜和头部为中心的运动信号，根据任务的要求。
Recent investigations indicate that retinal motion is not directly available for perception when moving around [Souman JL, et al. (2010) J Vis 10:14], possibly pointing to suppression of retinal speed sensitivity in motion areas. Here, we investigated the distribution of retinocentric and head-centric representations of self-rotation in human lower-tier visual motion areas. Functional MRI responses were measured to a set of visual self-motion stimuli with different levels of simulated gaze and simulated head rotation. A parametric generalized linear model analysis of the blood oxygen level-dependent responses revealed subregions of accessory V3 area, V6(+) area, middle temporal area, and medial superior temporal area that were specifically modulated by the speed of the rotational flow relative to the eye and head. Pursuit signals, which link the two reference frames, were also identified in these areas. To our knowledge, these results are the first demonstration of multiple visual representations of self-motion in these areas. The existence of such adjacent representations points to early transformations of the reference frame for visual self-motion signals and a topography by visual reference frame in lower-order motion-sensitive areas. This suggests that visual decisions for action and perception may take into account retinal and head-centric motion signals according to task requirements.