Identification of muscle synergy in human standing based on motor learning

2020 Fiscal Year Final Research Report

• Project/Area Number: 18H03165
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 59030:Physical education, and physical and health education-related
• Research Institution: Kyoto University
• Principal Investigator: Kouzaki Motoki 京都大学, 人間・環境学研究科, 教授 (30313167)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: 運動制御 / 二足立位 / 視覚運動変換 / オプティカルフロー / 足圧中心動揺

Outline of Final Research Achievements

Using the visuomotor transformation task and visual disturbance due to optical flow, present study investigated how the internal model that reflects the relationship between visual information and motor control in standing posture is modified. The former is a rotational disturbance in which the position of foot center of pressure displayed on the screen rotates counterclockwise around the reference point from the actual position of foot center of pressure, and the latter is a rotation disturbance in which the dots displayed on the head mount display stand. It is designed to rotate counterclockwise according to the position in the front-back direction. The standing position became unstable by rotational disturbance, and even if the rotational disturbance disappeared, the standing position tilted in the opposite direction to the rotation. From these results, it was clarified about the learning effect that the modification of visuomotor transformation has on the standing control.

Free Research Field

運動制御

Academic Significance and Societal Importance of the Research Achievements

ヒトの二足立位は、前庭系・視覚系・体性感覚系の情報をもとにした制御が必要であり、運動学習による影響を明確にするには複雑な課題である。本研究は、立位制御に与える学習効果を検討した初めての研究でありその学術的意義は大きい。高齢者の立位バランスの低下は視覚情報の減退が要因との指摘がある。本研究の結果、立位バランスの不安定さの主因および立位不安定からの改善が明確になり、高齢者の転倒予防の観点からその社会的意義は極めて大きい。