歩行中における床面素材の変化に対する運動パターンの適応過程  [in Japanese] Adapting Process of Motor Patterns During Walking on Different Floor Materials  [in Japanese]

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Abstract

【目的】歩行中における床面素材の変化に対する運動パターンの変化過程を検討する。【方法】対象は健常者10名とした。床面素材が木製からスポンジ製へ変化する歩行路を歩行中の左下肢に対し,筋電図,関節運動を記録した。歩行路全体に布を被せ素材が視覚的に確認できないものとし,被験者には素材が変化することを事前に知らせなかった。素材の変化前後での7歩行周期について,筋活動量,各関節間の協調パターンを示す曲線とその長さを算出した。試行は連続3回行い,1,3試行目で歩行周期ごとに各項目を比較した。【結果】筋活動量では,素材変化直後で1試行目が有意に高値を示した(p<0.05)。関節間協調パターンでは,素材変化直後1試行目が有意に高値を示したのに対し(p<0.05),変化直前では3試行目が有意に高値を示した(p<0.05)。【結論】ヒトの歩行は環境変化前から予測的にその運動パターンを変化させることで環境変化後も安定を維持していることが示唆された。

Objective: To examine the changes in motor patterns during walking on different floor materials. Methods: We obtained electromyograms and recorded the joint motion of the left lower extremity of 10 healthy participants when they were walking on a path on which the floor material changed from wood to sponge. The entire path was covered with a cloth so that the floor material could not be visually identified. Before the study, the participants were not informed that the path was made of different materials. We determined the amount of muscular activity, curve showing the coordination pattern of each joint pair, and curve length for 7 gait cycles before and after the change in floor material. The test was performed for 3 consecutive times. Values for each parameter determined during each gait cycle in the first and third test were compared. Results: During the first test, a significant increase (p<0.05) was recorded in muscular activity immediately after the participants entered an area with a different floor material. The coordination pattern of each joint pair significantly increased (p<0.05) immediately after a change in floor material during the first test, whereas this value significantly increased (p<0.05) just before a change in floor material during the third test. Conclusions: Our results indicate that human beings maintain stability during walking by predictively altering their gait motor pattern even after the circumstances changed.

Journal

  • Physical Therapy Japan

    Physical Therapy Japan 40(3), 161-168, 2013

    Japanese Society of Physical Therapy

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