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首页> 外文期刊>Journal of Neurophysiology >Simultaneous and opposing horizontal VOR adaptation in humans suggests functionally independent neural circuits
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Simultaneous and opposing horizontal VOR adaptation in humans suggests functionally independent neural circuits

机译：人类的同时和相反的水平VOR适应表明功能独立的神经电路

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摘要

The healthy vestibulo-ocular reflex (VOR) ensures that images remain on the fovea of the retina during head rotation to maintain stable vision. VOR behavior can be measured as a summation of linear and nonlinear properties although it is unknown whether asymmetric VOR adaptation can be performed synchronously in humans. The purpose of the present study is twofold. First, examine whether the right and left VOR gains can be synchronously adapted in opposing directions. Second, to investigate whether the adaptation context transfers between both sides. Three separate VOR adaptation sessions were randomized such that the VOR was adapted Up-bilaterally, Down-bilaterally, or Mixed (one side up, opposite side down). Ten healthy subjects completed the study. Subjects were tested while seated upright. 1 meter in front of a wall in complete dark. Each subject made active (self-generated) head impulse rotations for 15 min while viewing a gradually increasing amount of retinal slip. VOR training demand changed by 10% every 90 s. The VOR changed significantly for all training conditions. No significant differences in the magnitude of VOR gain changes between training conditions were found. The human VOR can be simultaneously driven in opposite directions. The similar magnitude of VOR gain changes across training conditions suggests functionally independent VOR circuits for each side of head rotation that mediate simultaneous and opposing VOR adaptations.
机译：健康的vertibulo-Ophull反射（VOR）可确保在头部旋转期间保持图像的FOVEA，以保持稳定的视觉。 VOR行为可以作为线性和非线性属性的总和测量，但是未知是否可以在人类中同步地执行非对称VOR自适应。本研究的目的是双重的。首先，检查右边和左边的VOR增益是否可以同步地适应相反的方向。其次，调查适应上下文是否在两侧转移。三个单独的VOR适应会话随机化，使得VOR适应双侧，下双侧或混合（一个侧面，相反侧面）。十个健康的科目完成了这项研究。在坐直的同时测试受试者。 1米在完全黑暗的墙壁前。每个受试者在观察视网膜滑动逐渐增加的视网膜滑动时，每个受试者使活跃（自成）头部脉冲旋转15分钟。 VOR培训需求每90秒改变10％。对于所有培训条件，VOR显着变化。发现了培训条件之间的VOR增加变化的显着差异。人的VOR可以同时以相反的方向驱动。在训练条件上的VOR增益的类似幅度提高了功能上独立的VOR电路，用于同时和相反的VOR适应的头旋转的每一侧。

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