Physical functions required for gait reconstruction in hemiplegic stroke patients focusing on balance responses to floor lateral disturbance

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K11306
• 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: Showa University
• Principal Investigator: Kamono Arinori 昭和大学, 保健医療学部, 准教授 (70551232)
• Co-Investigator(Kenkyū-buntansha): 荻原 直道 東京大学, 大学院理学系研究科(理学部), 教授 (70324605)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 姿勢制御 / 視覚入力 / 床側方移動 / 運動障害 / リハビリテーション

Outline of Final Research Achievements

This study focuses on the lateral balance function, which is related to the weight transfer between the left and right legs during walking and the response to the ground reaction force, as a physical ability necessary for hemiplegic stroke patients to restore walking ability. The purpose of this study was to clarify the balance response to directional floor disturbance stimuli. Due to the restrictions in the research environment due to the spread of COVID-19, it was difficult to conduct experiments on hemiplegic stroke patients. It was confirmed that the start time of muscle activity in response to the lateral disturbance that floor moves to the right changes depending on visual conditions in the left and right tibialis anterior muscle, left erector spinae muscle, and right triceps muscle.

Free Research Field

バイオメカニクス

Academic Significance and Societal Importance of the Research Achievements

本研究では，健常者の視覚条件を変化させ，側方外乱に対する動的立位バランスの筋活動量，筋活動開始時刻を調べた。その結果，右外乱に対する筋活動開始時刻では，左右の前脛骨筋・左脊柱起立筋・右下腿三頭筋で、開眼条件より閉眼条件で有意に早くなったため，側方外乱での筋活動開始時刻と視覚条件に関連があることが示された。
本研究で得られた知見を元に、改めて側方への床外乱刺激による足部への外力応答を力学的に解析する実験環境を構築し、片麻痺者や高齢者の外乱応答の特性と、視覚入力がそれに及ぼす影響を明らかにしたい。