Eye position signals modulate early dorsal and ventral visual areas
Eye position signals modulate early dorsal and ventral visual areas
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DOI：
10.1093/cercor/12.9.991
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发表时间：
2002-09-01
期刊：
影响因子：
3.7
通讯作者：
Vilis, T
中科院分区：
文献类型：
--
作者：
DeSouza, JFX;Dukelow, SP;Vilis, T
眼睛位置的内在感觉是保持视觉世界的恒定性所必需的，尽管眼睛在运动。神经影像学研究已经定位了人类同源的猴子视觉运动处理区在MT/MST，也在侧沟（V4），一个区域内的代码对象的功能。我们发现，这两个领域有一个基线的功能磁共振成像信号，眼睛的位置调制和眼睛的位置信号的首选方向是不同的，在这两个领域;增加MT/MST的同侧眼位置和增加侧沟内的反侧眼位置。该基线调制是真实的眼睛位置信号;在没有视觉运动刺激的情况下存在的信号。眼睛位置信号的优选方向的差异可以反映这两个区域中的不同变换;从视网膜定位（以眼睛为中心）到引导动作所需的以自我为中心的坐标系以及到用于对象识别的以对象为中心的坐标系的变换。
An internal sense of eye position is necessary to maintain the constancy of the visual world in spite of movements of the eyes. Neuroimaging studies have localized human homologs of monkey visual motion processing areas in MT/MST and also in the collateral sulcus (V4), an area that codes features within objects. We show that these two areas have a baseline fMRI signal that is modulated by eye position and that the preferred direction of the eye position signal is different in the two areas; increasing for ipsiversive eye positions in MT/MST and increasing for contraversive eye positions within the collateral sulcus. This baseline modulation is a true eye position signal; one that is present in the absence of visual motion stimuli. The difference in the preferred direction of the eye position signal may reflect the different transformations in these two areas; a transformation from a retinotopic (eye-centered) to an egocentric coordinate frame necessary for guiding action and to an object-centered frame for object recognition.