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首页> 外文期刊>BioMedical Engineering OnLine >Relationship of EMG/SMG features and muscle strength level: an exploratory study on tibialis anterior muscles during plantar-flexion among hemiplegia patients
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Relationship of EMG/SMG features and muscle strength level: an exploratory study on tibialis anterior muscles during plantar-flexion among hemiplegia patients

机译：EMG / SMG特征与肌肉力量水平的关系：偏瘫患者plant屈期间胫前肌的探索性研究

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Background Improvement in muscle strength is an important aim for the rehabilitation of hemiplegia patients. Presently, the rehabilitation prescription depends on the evaluation results of muscle strength, which are routinely estimated by experienced physicians and therefore not finely quantitative. Widely-used quantification methods for disability, such as Barthel Index (BI) and motor component of Functional Independent Measure (M-FIM), yet have limitations in their application, since both of them differentiated disability better in lower than higher disability, and they are subjective and recorded in wide scales. In this paper, to explore finely quantitative measures for evaluation of muscle strength level (MSL), we start with the study on quantified electromyography (EMG) and sonomyography (SMG) features of tibialis anterior (TA) muscles among hemiplegia patients. Methods 12 hemiplegia subjects volunteered to perform several sets of plantar-flexion movements in the study, and their EMG signals and SMG signals were recorded on TA independently to avoid interference. EMG data were filtered and then the root-mean-square (RMS) was computed. SMG signals, specifically speaking, the muscle thickness of TA, were manually measured by two experienced operators using ultrasonography. Reproducibility of the SMG assessment on TA between operators was evaluated by non-parametric test (independent sample T test). Possible relationship between muscle thickness changes (TC) of TA and muscle strength level of hemiplegia patients was estimated. Results Mean of EMG RMS between subjects is found linearly correlated with MSL (R2?=?0.903). And mean of TA muscle TC amplitudes is also linearly correlated with MSL among dysfunctional legs (R2?=?0.949). Moreover, rectified TC amplitudes (dysfunctional leg/ healthy leg, DLHL) and rectified EMG signals (DLHL) are found in linear correlation with MSL, with R2?=?0.756 and R2?=?0.676 respectively. Meanwhile, the preliminary results demonstrate that patients’ peak values of TC are generally proportional to their personal EMG peak values in 12 dysfunctional legs and 12 healthy legs (R2?=?0.521). Conclusions It’s concluded that SMG could be a promising option to quantitatively estimate MSL for hemiplegia patients during rehabilitation besides EMG. However, after this exploratory study, they should be further investigated on a larger number of subjects.
机译：背景技术肌肉力量的改善是偏瘫患者康复的重要目标。当前，康复处方取决于肌肉力量的评估结果，该评估结果是由经验丰富的医生常规评估的，因此无法精确定量。广泛使用的残疾量化方法，例如Barthel指数（BI）和功能独立测量（M-FIM）的运动成分，但在应用方面存在局限性，因为这两种方法在区分残疾方面要比对较高残疾的区分要好。是主观的并且被广泛记录。在本文中，为了探索用于评估肌力水平（MSL）的精细定量方法，我们开始研究偏瘫患者中胫骨前（TA）肌肉的定量肌电图（EMG）和体电图（SMG）特征。方法12名偏瘫患者自愿参加本研究，进行多组足底屈曲运动，并在TA上独立记录他们的EMG信号和SMG信号，以免产生干扰。过滤EMG数据，然后计算均方根（RMS）。 SMG信号，特别是TA的肌肉厚度，是由两名经验丰富的操作人员使用超声手动测量的。通过非参数检验（独立样本T检验）评估了操作员之间TA上SMG评估的可重复性。估计了TA的肌肉厚度变化（TC）与偏瘫患者的肌肉力量水平之间的可能关系。结果受试者之间的肌电图均方根均值与MSL呈线性相关（R 2 α=？0.903）。在功能障碍的腿中，TA肌肉TC振幅的平均值也与MSL呈线性相关（R 2 ？=？0.949）。此外，发现矫正后的TC振幅（功能失调的腿/健康腿，DLHL）和矫正的肌电信号（DLHL）与MSL呈线性相关，R 2 α=？0.756，R 2 < /sup>?=?0.676。同时，初步结果表明，患者的TC峰值通常与12条功能不良的腿和12条健康的腿的个人EMG峰值成比例（R 2 ？=？0.521）。结论结论是，除了肌电图外，肌电图可能是定量评估偏瘫患者康复期间MSL的有前途的选择。但是，在进行了此探索性研究之后，应该对更多的受试者进行进一步的研究。

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