Eye Position Effects in Oculomotor Plasticity and Visual Localization
Eye Position Effects in Oculomotor Plasticity and Visual Localization
复制标题
眼位对动眼神经可塑性和视觉定位的影响
作者：
E. Zimmermann;M. Lappe
为了使视觉定位在注视变化时保持准确，需要表示眼睛在眼眶中的位置的信号来编码独立于视网膜位移的参考系中的空间位置。在这里，我们报告了证据，表明视觉对象在空间中的定位是在视网膜外参考系中编码的。在人类受试者中，我们使用了外向扫视适应，这可以通过扫视目标的系统位移来人为诱导。这种形式的动眼可塑性伴随着空间知觉的变化，从而凸显了眼跳指标对于视觉定位的相关性。我们测试了反应性扫视和视觉定位的外向适应参考系。对于扫描扫视，在远离适应的眼睛位置的位置处，适应幅度急剧减小。视觉定位的变化显示出非常相似的眼睛位置调节。这些结果表明扫描扫视适应是在非视网膜专题参考系中编码的。眼睛位置对反应性扫视适应的影响较小，并且引起的错误定位在眼睛位置之间没有显着变化。反应性和扫描性扫视适应的不同调制支持了动眼可塑性可以发生在大脑多个部位的观点。研究结果也与之前的证据一致，即扫描扫视适应对空间物体的视觉定位有更强的影响。
For visual localization to remain accurate across changes of gaze, a signal representing the position of the eye in the orbita is needed to code spatial locations in a reference frame that is independent of retinal displacements. Here we report evidence that the localization of visual objects in space is coded in an extraretinal reference frame. In human subjects, we used outward saccadic adaptation, which can be induced artificially by a systematic displacement of the saccade target. This form of oculomotor plasticity is accompanied by changes in spatial perception, thus highlighting the relevance of saccade metrics for visual localization. We tested the reference frame of outward adaptation for reactive and scanning saccades and visual localization. For scanning saccades, adaptation magnitude was drastically reduced at positions distant from the adapted eye position. Changes in visual localization showed a very similar modulation of eye position. These results suggest that scanning saccade adaptation is encoded in a nonretinotopic reference frame. Eye position effects for reactive saccade adaptation were smaller, and the induced mislocalization did not vary significantly between eye positions. The different modulation of reactive and scanning saccade adaptation supports the idea that oculomotor plasticity can occur at multiple sites in the brain. The findings are also consistent with previous evidence for a stronger influence of scanning saccade adaptation on the visual localization of objects in space.
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眼跳大小和方向的行为变化产生的猿适应场的特征。
DOI：
10.1152/jn.1999.81.6.2798
发表时间：
1999
期刊：
Journal of neurophysiology.
影响因子：
--
作者：
Noto,CT;Watanabe,S;Fuchs,AF
通讯作者：
Fuchs,AF
影响因子：
56.9
作者：
ANDERSEN, RA;ESSICK, GK;SIEGEL, RM
通讯作者：
SIEGEL, RM
影响因子：
2.5
作者：
ROBINSON, FR;STRAUBE, A;FUCHS, AF
通讯作者：
FUCHS, AF
影响因子：
2.5
作者：
Graziano, MSA;Hu, XTA;Gross, CG
通讯作者：
Gross, CG