Mandalidis Dimitris G, Karagiannakis Dimitris N
Sports Physical Therapy Laboratory, School of Physical Education and Sports Science, National and Kapodistrian University of Athens, Greece.
MethodsX. 2020 Jun 13;7:100964. doi: 10.1016/j.mex.2020.100964. eCollection 2020.
Postural control, despite its complexity, has been investigated based on single or multiple domain parameters, mainly under static conditions. The purpose of this study was to investigate whether semi-squatting in one leg, in contrast to simply standing in one leg, can challenge the postural control in a more dynamic manner similar to those encountered during sporting activities, using posturographic-based parameters coupled with EMG data of the ankle musculature. Our findings revealed that the decreased stability induced with single-leg semi-squatting (SLSQ) required primarily the contribution of the tibialis anterior and the peroneus brevis, as opposed to the medial gastrocnemius and lateral gastrocnemius who were the main controllers of body posture during single-leg standing (SLST) with open eyes. The lower variability found in the CoP-based parameters and the EMG activity of the muscle under investigation suggests that postural control can be more accurately assessed under dynamic conditions such as with SLSQ compared to the more static SLST test. Multi-factorial analysis of postural control combining posturographic and EMG data, particularly under dynamic conditions, can provide useful information in the diagnosis and rehabilitation of clinical cases where the assessment of muscle dysfunction is required to design a rehabilitation program and monitor patient progress. •Simultaneous recordings of posturographic-based parameters and the EMG activity of the ankle/foot musculature suggest that postural control is challenged more during SLSQ.•Postural control with SLSQ is mainly controlled by the tibialis anterior and peroneus brevis in response to a greater anteroposterior- compared to mediolateral-directed sway of the body.•The limited body sway elicited with the traditional SLST test is mainly controlled by the gastrocnemius muscle.•Postural control may be assessed more accurately under dynamic conditions such as with SLSQ as opposed to the standard SLST test.
尽管姿势控制很复杂，但主要是在静态条件下基于单个或多个领域参数进行研究的。本研究的目的是调查单腿半蹲，与单腿站立相比，是否能以一种更动态的方式挑战姿势控制，类似于体育活动中遇到的情况，使用基于姿势描记法的参数以及踝关节肌肉的肌电图数据。我们的研究结果表明，单腿半蹲（SLSQ）引起的稳定性下降主要需要胫骨前肌和腓骨短肌的参与，而在睁眼单腿站立（SLST）期间，身体姿势的主要控制者是腓肠肌内侧头和腓肠肌外侧头。在基于压力中心（CoP）的参数和所研究肌肉的肌电图活动中发现的较低变异性表明，与更静态的SLST测试相比，在动态条件下（如SLSQ）可以更准确地评估姿势控制。结合姿势描记法和肌电图数据对姿势控制进行多因素分析，特别是在动态条件下，可以为临床病例的诊断和康复提供有用信息，在这些病例中，需要评估肌肉功能障碍以设计康复计划并监测患者进展。
•基于姿势描记法的参数与踝关节/足部肌肉肌电图活动的同步记录表明，SLSQ期间姿势控制受到的挑战更大。
•SLSQ时的姿势控制主要由胫骨前肌和腓骨短肌控制，以应对身体更大的前后向摆动，而不是内外侧摆动。
•传统SLST测试引起的有限身体摆动主要由腓肠肌控制。
•与标准SLST测试相比，在动态条件下（如SLSQ）可以更准确地评估姿势控制。
