RESEARCH ON INTER-SENSORY INTERACTION FOR VISUAL STABILITY IN COSMIC SPACE

我们研究了人类在地面上的身体运动（包括精细运动）中如何实现视觉稳定性。视觉稳定性的知觉被其他感觉如体感、前庭和肌肉紧张所改变。我们将主要关注由于前庭输入而引起的微重力下眼球运动所产生的视觉感知的改变。VOR在地球上的1g条件下不断受到刺激。事实上，人类在日常的1g环境中已经习惯和“编程”了定向（视觉稳定性）。当人类暴露在具有不同重力矢量的环境中时，这种编程行为必须改变；也就是说，它被重新编程了。这被称为习惯化或熟悉化。我们研究了物体运动感知在微重力环境下是如何受到干扰的。该实验的重点是视觉、前庭和体感知觉协调，以及它们在微重力环境下与1g环境下的变化。我们利用眼电图和肌电图获得了眼球运动和颈部肌肉活动之间的协调信息。我们还通过自我诊断问卷收集了有关感知异常的数据。当每个感觉输入功能及其与高级神经系统的整合被很好地表征后，就可以开发出更有效的控制SAS的技术。该主题是当前研究报告的共同作者之一，日本有效载荷专家（JPS） Mamoru Mohri。

We examined how human beings achieve visual stability during body movements, including fine motion, on the ground. The perception of visual stability is modified by other sensations such as somatosensory, vestibular, and muscle tension. We will mainly focus on modifications of visual perception produced by eye movements in microgravity due to vestibular inputs. The VOR is constantly stimulated under 1-G conditions here on Earth. In fact, human beings have been habituated and "programd" for orientation (visual stability) in their everyday, 1-G environment. When humans are exposed to an environment with different gravity vectors, this programd behavior must change ; that is, it is reprogramd. This is called habituation or familiarization. We examined how object motion perception is perturbed in the microgravity environment. The experiment focuses on visual, vestibular and somatosensory perception coordination and how it changes in microgravity as compared to a 1-G environment. We obtained information on the coordination between eye movement and neck muscle activity using EOG and EMG.We also collected data from the payload specialist by a self-diagnostic questionnaire concerned with perceptual abnormality. When each sensory input function and it's integration the higher nervous system are well characterized, more effective techniques to control SAS may be developed. The subject was one of the co-authors in the current research report, Japanese payload specialist(JPS) Mamoru Mohri.