本文選題：肌電信號(hào) + 變分模態(tài)分解�。� 參考：《物理學(xué)報(bào)》2017年06期

【摘要】：肌間耦合是肢體運(yùn)動(dòng)過程中不同肌肉間的相互關(guān)聯(lián)與相互協(xié)調(diào)作用.通過研究肌電信號(hào)(s EMG)間特征頻段的耦合特性可以獲得肌肉間的功能聯(lián)系及中樞神經(jīng)系統(tǒng)支配肢體運(yùn)動(dòng)的執(zhí)行與協(xié)調(diào)方式機(jī)理.本文將變分模態(tài)分解與相干分析相結(jié)合,構(gòu)建變分模態(tài)分解-相干分析模型,定量描述肢體運(yùn)動(dòng)中相關(guān)肌肉sEMG在特征頻段的耦合特性.在20%最大自主收縮力靜態(tài)負(fù)荷強(qiáng)度下,采集20名健康被試的sEMG,基于變分模態(tài)分解方法將sEMG時(shí)頻尺度化,進(jìn)而分析不同sEMG在特征頻段的相干性,并計(jì)算顯著相干面積指標(biāo),定量分析肌間特征頻段的功能耦合特性.結(jié)果表明:低負(fù)荷靜態(tài)握力維持過程中,指淺屈肌與尺側(cè)腕曲肌、指淺屈肌與指伸肌的beta與gamma頻段耦合強(qiáng)度隨時(shí)間推進(jìn)而增強(qiáng);相較于指淺屈肌與指伸肌,疲勞狀態(tài)下指淺屈肌與尺側(cè)腕曲肌beta與gamma頻段耦合強(qiáng)度變化更顯著,且瞬時(shí)頻率特征變化相似,揭示運(yùn)動(dòng)致疲勞過程中協(xié)同肌受中樞神經(jīng)系統(tǒng)控制以更加同步的方式活動(dòng).
[Abstract]:Intermuscular coupling is the interaction and coordination of different muscles during limb movement. By studying the coupling characteristics of the characteristic frequency band between EMG signals, the functional relationship between muscles and the mechanism of the central nervous system (CNS) innervating limb movement execution and coordination can be obtained. In this paper, the variational mode decomposition (VMD) and coherent analysis are combined to construct the variational mode decomposition (VMD) coherent analysis model to quantitatively describe the coupling characteristics of muscle sEMG in the characteristic frequency band in limb motion. Under the static load intensity of 20% maximum independent contractile force, the sEMG of 20 healthy subjects was collected, the time-frequency scaling of sEMG was based on variational mode decomposition method, the coherence of different sEMG in characteristic frequency band was analyzed, and the significant coherent area index was calculated. Quantitative analysis of the functional coupling characteristics of the intermuscular characteristic band. The results showed that the coupling strength of beta and gamma bands between flexor digitorum and flexor Carpi ulnaris and flexor digitorum and extensor digitorum muscle increased with time during the maintenance of low load static grip strength, compared with that of flexor digitorum muscle and extensor digitorum muscle. The coupling strength of flexor digitalis and flexor carpi ulnaris in the frequency band of beta and gamma is more significant, and the characteristic of instantaneous frequency is similar. It is revealed that the synergistic muscle is controlled by the central nervous system in the process of exercise induced fatigue in a more synchronous manner.
【作者單位】： 燕山大學(xué)電氣工程學(xué)院河北省測(cè)試計(jì)量技術(shù)及儀器重點(diǎn)實(shí)驗(yàn)室;中國(guó)人民解放軍第281醫(yī)院康復(fù)醫(yī)學(xué)科;
【基金】：國(guó)家自然科學(xué)基金(批準(zhǔn)號(hào):61271142) 河北省自然科學(xué)基金(批準(zhǔn)號(hào):F2015203372,F2014203246) 河北省高等學(xué)�？茖W(xué)技術(shù)研究項(xiàng)目(批準(zhǔn)號(hào):QN2016094)資助的課題~~
【分類號(hào)】：R87

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1 裴利軍;邱本花;;模態(tài)分解法在非恒同耦合系統(tǒng)同步研究中的推廣[A];第十二屆全國(guó)非線性振動(dòng)暨第九屆全國(guó)非線性動(dòng)力學(xué)和運(yùn)動(dòng)穩(wěn)定性學(xué)術(shù)會(huì)議論文集[C];2009年

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