Muscle contributions to mediolateral and anteroposterior foot placement during walking

JOURNAL OF BIOMECHANICS

卷:95

Article

Roelker, Sarah A.¹  Kautz, Steven A.^2,3  Neptune, Richard R.¹ 

[1] Univ Texas Austin, Walker Dept Mech Engn, Austin, TX 78712 USA

[2] Ralph H Johnson VA Med Ctr, Charleston, SC USA

[3] Med Univ South Carolina, Coll Hlth Profess, Dept Hlth Sci & Res, Charleston, SC 29425 USA

关键词: Segmental power;    Dynamic simulation;    Balance control;    Biomechanics;   

DOI  :  10.1016/j.jbiomech.2019.08.004

来源: Elsevier

【 摘 要 】

Foot placement is critical to balance control during walking and is primarily controlled by muscle force generation. Although gluteus medius activity has been associated with mediolateral foot placement, how other muscles contribute to foot placement is not clear. Furthermore, although dynamic walking models have suggested that anteroposterior foot placement can be passively controlled, the extent to which muscles actively contribute to anteroposterior foot placement has not been determined. The objective of this study was to identify individual muscle contributions to mediolateral and anteroposterior foot placement during walking in healthy adults. Dynamic simulations of walking were developed for six older adults and a segmental power analysis was performed to determine the individual muscle contributions to the mediolateral and anteroposterior power delivered to the foot segment. The simulations revealed the ipsilateral swing limb gluteus medius, iliopsoas, rectus femoris and hamstrings and the contralateral stance limb gluteus medius and ankle plantarflexors were primary contributors to both mediolateral and anteroposterior foot placement. Muscle contributions to foot placement were found to be highly influenced by their contributions to pelvis power, which was dominated by those muscles crossing the hip joint. Thus, impaired balance control may be improved by focusing rehabilitation interventions on optimizing the coordination of those muscles crossing the hip joint and the ankle plantarflexors. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

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