Hiraoka Koichi, Ae Minori, Ogura Nana, Sano Chisa, Shiomi Keigo, Morita Yuji, Yokoyama Haruka, Iwata Yasuyuki, Jono Yasutomo, Nomura Yoshifumi, Tani Keisuke, Chujo Yuta
a College of Health and Human Sciences , Osaka Prefecture University , Habikino , Japan.
J Mot Behav. 2015;47(6):522-6. doi: 10.1080/00222895.2015.1020356. Epub 2015 Apr 7.
The authors investigated the effect of an auditory cue on the choice of the initial swing leg in gait initiation. Healthy humans initiated a gait in response to a monaural or binaural auditory cue. When the auditory cue was given in the ear ipsilateral to the preferred leg side, the participants consistently initiated their gait with the preferred leg. In the session in which the side of the monaural auditory cue was altered trial by trial randomly, the probability of initiating the gait with the nonpreferred leg increased when the auditory cue was given in the ear contralateral to the preferred leg side. The probability of choosing the nonpreferred leg did not increase significantly when the auditory cue was given in the ear contralateral to the preferred leg side in the session in which the auditory cue was constantly given in the ear contralateral to the preferred leg side. The reaction time of anticipatory postural adjustment was shortened, but the probability of choosing the nonpreferred leg was not significantly increased when the gait was initiated in response to a binaural auditory cue. An auditory cue in the ear contralateral to the preferred leg side weakens the preference for choosing the preferred leg as the initial swing leg in gait initiation when the side of the auditory cue is unpredictable.
作者研究了听觉提示对步态起始时初始摆动腿选择的影响。健康受试者在单耳或双耳听觉提示下开始行走。当听觉提示在偏好腿一侧的同侧耳给出时，参与者始终用偏好腿开始行走。在单耳听觉提示的一侧逐次随机改变的实验环节中，当听觉提示在偏好腿一侧的对侧耳给出时，用非偏好腿开始行走的概率增加。在听觉提示始终在偏好腿一侧的对侧耳给出的实验环节中，当听觉提示在偏好腿一侧的对侧耳给出时，选择非偏好腿的概率没有显著增加。预期姿势调整的反应时间缩短，但当对双耳听觉提示做出反应开始行走时，选择非偏好腿的概率没有显著增加。当听觉提示的一侧不可预测时，偏好腿一侧的对侧耳的听觉提示会削弱在步态起始时选择偏好腿作为初始摆动腿的偏好。
