Effect of moving tactile stimuli to sole on postural control

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K11187
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 59010:Rehabilitation science-related
• Research Institution: Osaka Metropolitan University (2022); Osaka Prefecture University (2020-2021)
• Principal Investigator: Hiraoka Koichi 大阪公立大学, 大学院リハビリテーション学研究科, 教授 (10321209)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 動的触覚刺激 / 立位 / 姿勢制御 / 側圧中心

Outline of Final Research Achievements

The effects of moving tactile stimuli to the sole in the standing position on the control of postural sway were examined. During the moving tactile stimuli to the sole, rhythmic deviation of the center of pressure in the medial-lateral axis in accordance with the movement phase of the tactile stimuli was observed. Since this phenomenon also occurred when the tactile stimuli were simply moved laterally, we concluded that the moving tactile stimuli to the sole in the medial-lateral axis induce the phase-dependent body sway in the medial-lateral axis in quiet stance. The moving tactile stimuli given before gait initiation weakened anticipatory postural adjustment before gait initiation, and prolonged the step time, suggesting that this weakening of predictive postural control was caused by the slowing of the gait initiation. Taken together, these results suggest that moving tactile stimuli to the sole is a useful tool for inducing the medial-lateral body sway in quiet stance.

Free Research Field

運動制御

Academic Significance and Societal Importance of the Research Achievements

立位における足底への動的触覚刺激による姿勢制御変調の知見はこれまで見当たらない。今回得られた姿勢制御を変調させる動的触覚刺激パターンの発見は、立位姿勢制御障害に対する理学療法技術の向上に寄与すると考えられる。