The vestibulo-ocular reflex (VOR) consists of two components, the rotational VOR (rVOR) elicited by semicircular canal signals and the translational VOR (tVOR) elicited by otolith signals. Given the relevant role of the vertical tVOR in human walking, this study aimed at measuring the time delay of eye movements in relation to whole-body vertical translations in natural standing position. Twenty (13 females and 7 males) healthy, young subjects (mean 25 years) stood upright on a motor-driven platform and were exposed to sinusoidal movements while fixating a LED, positioned at a distance of 50 cm in front of the eyes. The platform motion induced a vertical translation of 2.6 cm that provoked counteracting eye movements similar to self-paced walking. The time differences between platform and eye movements indicated that the subject's timing of the extraocular motor reaction depended on stimulus frequency and number of repetitions. At low stimulus frequencies (<0.8 Hz) and small numbers of repetitions (<3), eye movements were phase advanced or in synchrony with platform movements. At higher stimulus frequencies or continuous stimulation, eye movements were phase lagged by ~40 ms. Interestingly, the timing of eye movements depended on the initial platform inclination. Starting with both feet in dorsiflexion, eye movements preceded platform movements by 137 ms, whereas starting with both feet in plantar flexion eye movement precession was only 19 ms. This suggests a remarkable influence of foot proprioceptive signals on the timing of eye movements, indicating that the dynamics of the vertical tVOR is controlled by somatosensory signals.

中文翻译：

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体感对平台诱导的人类垂直方向上的平移性眼动反射的体感影响。

前庭眼反射（VOR）由两个部分组成，由半圆形管信号引起的旋转VOR（rVOR）和由耳石信号引起的平移VOR（tVOR）。考虑到垂直tVOR在人类行走中的相关作用，本研究旨在测量与自然站立姿势下的全身垂直平移有关的眼球运动的时间延迟。二十名（13名女性和7名男性）健康，年轻的受试者（平均25岁）直立在电机驱动的平台上，并在固定LED的情况下进行正弦运动，固定在眼前50厘米处。平台运动引起了2.6 cm的垂直平移，从而抵消了类似于自定步伐行走的眼睛运动。平台运动和眼睛运动之间的时间差表明受试者的 眼外运动反应的时机取决于刺激频率和重复次数。在低刺激频率（<0.8 Hz）和少量重复（<3）下，眼球运动是相位超前的或与平台运动同步。在较高刺激频率或连续刺激下，眼球运动相位滞后约40毫秒。有趣的是，眼球运动的时机取决于平台的初始倾斜度。从双脚开始背屈开始，眼球运动先于平台运动137 ms，而双脚开始在足底屈曲过程中眼球进动仅19 ms。这表明足部本体感受信号对眼睛运动的时间有显着影响，表明垂直tVOR的动力学受体感信号控制。