Quantitative Assessment of Changes in Muscle Contractility Due to Fatigue During NMES: An Ultrasound Imaging Approach
Quantitative Assessment of Changes in Muscle Contractility Due to Fatigue During NMES: An Ultrasound Imaging Approach
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DOI：
10.1109/tbme.2019.2921754
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发表时间：
2020-03-01
影响因子：
4.6
通讯作者：
Kim，Kang
中科院分区：
文献类型：
--
作者：
Sheng，Zhiyu;Sharma，Nitin;Kim，Kang
本文研究了一种基于超声成像的非侵入性方法，以定量评估肌肉收缩力的变化，由于疲劳引起的神经肌肉电刺激（NMES）。MethodsKnee extension实验对人类参与者进行同步等长膝关节力的数据和超声图像的电刺激股四头肌。首先在疲劳前阶段收集数据，然后在疲劳后阶段收集数据。使用收缩率自适应斑点跟踪算法处理超声图像。基于肌肉位移跟踪结果构建了二维应变测量场，以量化肌肉收缩性。结果应变图像分析表明，在疲劳前和疲劳后阶段之间，应变峰值减少，应变峰值分布发生变化，并且由大的阳性应变占据的面积减小。结论结果表明，由于NMES，肌肉收缩力的变化。显著性采用所提出的方法的超声成像是用于直接NMES诱导的疲劳评估的有前景的工具，并且促进减轻NMES诱导的疲劳的影响的新策略。
ObjectiveThis paper investigates an ultrasound imaging-based non-invasive methodology to quantitatively assess changes in muscle contractility due to the fatigue induced by neuromuscular electrical stimulation (NMES).MethodsKnee extension experiments on human participants were conducted to record synchronized isometric knee force data and ultrasound images of the electrically stimulated quadriceps muscle. The data were first collected in a pre-fatigue stage and then in a post-fatigue stage. Ultrasound images were processed using a contraction rate adaptive speckle tracking algorithm. A two-dimensional strain measure field was constructed based on the muscle displacement tracking results to quantify muscle contractility.ResultsAnalysis of the strain images showed that, between the pre-fatigue and post-fatigue stages, there was a reduction in the strain peaks, a change in the strain peak distribution, and a decrease in an area occupied by the large positive strain.ConclusionThe results indicate changes in muscle contractility due to the NMES-induced muscle fatigue.SignificanceUltrasound imaging with the proposed methodology is a promising tool for a direct NMES-induced fatigue assessment and facilitates new strategies to alleviate the effects of the NMES-induced fatigue.