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首页> 外文期刊>Journal of Biomechanics >Frontal plane standing balance with an ambulation aid: Upper limb biomechanics.
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Frontal plane standing balance with an ambulation aid: Upper limb biomechanics.

机译：额叶站立平衡并带有助行器：上肢生物力学。

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摘要

Despite widespread acceptance of clinical benefits, empirical evidence to evaluate the advantages and limitations of ambulation aids for balance control is limited. The current study investigates the upper limb biomechanical contributions to the control of frontal plane stability while using a 4-wheeled walker in quiet standing. We hypothesized that: (1) upper limb stabilizing moments would be significant, and (2) would increase under conditions of increased stability demand. Factors influencing upper limb moment generation were also examined. Specifically, the contributions of upper limb center-of-pressure (COP(hands)), vertical and horizontal loads applied to the assistive device were assessed. The results support a significant mechanical role for the upper limbs, generating 27.1% and 58.8% of overall stabilizing moments under baseline and challenged stability demand conditions, respectively. The increased moment was achieved primarily through the preferential use of phasic upper limb control, reflected by increased COP(hands) (baseline vs. challenged conditions: 0.29 vs. 0.72cm). Vertical, but not horizontal, was the primary force direction contributing to stabilizing moments in quiet standing. The key finding that the upper limbs play an important role in effecting frontal plane balance control has important implications for ambulation aid users (e.g., elderly, stroke, and traumatic brain injury).
机译：尽管广泛接受了临床益处，但是评估平衡控制用助行器的优点和局限性的经验证据仍然有限。当前的研究调查了在安静站立时使用四轮助行器时上肢生物力学对控制额面稳定性的贡献。我们假设：（1）上肢的稳定力矩很重要，并且（2）在稳定性需求增加的情况下会增加。还检查了影响上肢力矩产生的因素。具体来说，评估了上肢压力中心（COP（手）），施加在辅助装置上的垂直和水平载荷的贡献。结果支持了上肢的显着机械作用，在基线和挑战性的稳定需求条件下，分别产生了总稳定力矩的27.1％和58.8％。增加的力矩主要是通过优先使用阶段性上肢控制来实现的，反映为COP（手）的增加（基线vs.挑战条件：0.29 vs. 0.72cm）。垂直方向而非水平方向是主要力向，有助于稳定安静站立时的力矩。上肢在控制额平面平衡中起重要作用的关键发现对行动辅助使用者（例如老年人，中风和脑外伤）具有重要意义。

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