Hiraoka Koichi, Hatanaka Ryota, Nikaido Yasutaka, Jono Yasutomo, Nomura Yoshifumi, Tani Keisuke, Chujo Yuta
School of Health and Human Services, Osaka Prefecture University, Habikino city, Osaka, Japan.
Graduate School of Compremensive Rehabilitation, Osaka Prefecture University, Habikino city, Osaka, Japan.
J Hum Kinet. 2014 Oct 10;42:7-14. doi: 10.2478/hukin-2014-0056. eCollection 2014 Sep 29.
The purpose of this study was to investigate the asymmetry of anticipatory postural adjustment (APA) during gait initiation and to determine whether the process of choosing the initial swing leg affects APA during gait initiation. The participants initiated gait with the leg indicated by a start tone or initiated gait with the leg spontaneously chosen. The dependent variables of APA were not significantly different among the condition of initiating gait with the preferred leg indicated by the start tone, the condition of initiating gait with the non-preferred leg indicated by the start tone, and the condition of initiating gait with the leg spontaneously chosen. These findings fail to support the view that the process of choosing the initial swing leg affects APA during gait initiation. The lateral displacement of the center of pressure in the period in which shifting the center of pressure to the initial swing phase before initiating gait with the left leg indicated by the external cue was significantly larger than that when initiating gait with the right leg indicated by the external cue, and significantly larger than that when initiating gait with the leg spontaneously chosen. Weight shift to the initial swing side during APA during gait initiation was found to be asymmetrical when choosing the leg in response to an external cue.
本研究的目的是调查步态起始过程中预期姿势调整（APA）的不对称性，并确定选择初始摆动腿的过程是否会影响步态起始时的APA。参与者按照起始提示音指示的腿开始步态，或者用自发选择的腿开始步态。在由起始提示音指示用优势腿开始步态的条件、由起始提示音指示用非优势腿开始步态的条件以及用自发选择的腿开始步态的条件之间，APA的因变量没有显著差异。这些发现不支持以下观点：即选择初始摆动腿的过程会影响步态起始时的APA。在通过外部提示以左腿开始步态之前，将压力中心转移到初始摆动阶段的时间段内，压力中心的横向位移显著大于通过外部提示以右腿开始步态时的横向位移，且显著大于用自发选择的腿开始步态时的横向位移。当根据外部提示选择腿时，发现在步态起始时APA期间向初始摆动侧的体重转移是不对称的。
