CONTRAST SENSITIVITY AND OCULAR TREMULOUS MICRO-MOTIONS: A MODEL STUDY OF CHANGED GRAVITY EFFECTS ON VISUAL PERCEPTION

Q4 Biochemistry, Genetics and Molecular Biology Aviakosmicheskaia i ekologicheskaia meditsina = Aerospace and environmental medicine Pub Date : 2022-01-01 DOI:10.21687/0233-528x-2022-56-6-23-30

I. Shoshina, D. Kotova, I. Zelenskaya, S. Lyapunov, I. Lyapunov, M. Bekreneva, E. Tomilovskaya

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Abstract

Visual contrast sensitivity and tremulous micro-movements of eyes were evaluated in 10 human subjects (mean age 30.8 ± 4/6 yrs) volunteered for dry immersion (DI) as a model of the physiological effects of microgravity. Contrast sensitivity was registered using visocontrastmetry with presentation of the Gabor patches with spatial frequency 0.4, 1.0, 3.0, 6.0 and 10.0 c/deg. Amplitude and frequency of eye tremulous movements were measured using a high-frequency optical tweezer. Measurements were performed a day prior to immersion, on DI days 1, 3, 5 and 7, and on the next day after the DI completion. Contrast sensitivity was found altered within both the low and high spatial frequencies; ocular micro-motion amplitudes changed within a wide range. At this point in time, these findings are a step forward in search for a method of objective assessment of the central nervous system functioning in a changed environment.

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对比敏感度和眼球震颤微运动:重力变化对视觉感知影响的模型研究

我们对10名志愿者(平均年龄30.8±4/6岁)进行了视觉对比敏感度和眼球震颤微运动的评估，并将其作为微重力生理效应的模型。对比灵敏度采用视觉对比法，呈现空间频率为0.4、1.0、3.0、6.0和10.0 c/℃的Gabor斑块。用高频光镊测量眼球震颤运动的幅度和频率。测量分别在浸泡前一天、DI第1、3、5和7天以及DI完成后第二天进行。对比灵敏度在低、高空间频率范围内均发生改变;眼微动幅度变化幅度较大。在这个时间点上，这些发现是向前迈进了一步，寻找一种客观评估中枢神经系统在变化环境中的功能的方法。

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Aviakosmicheskaia i ekologicheskaia meditsina = Aerospace and environmental medicine Biochemistry, Genetics and Molecular Biology-Biochemistry, Genetics and Molecular Biology (all)

CiteScore

0.60

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0.00%

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