中华口腔医学研究杂志(电子版) ›› 2009, Vol. 3 ›› Issue (06) : 593 -597. doi: 10.3877/cma.j.issn.1674-1366.2009-06-004 × 扫一扫
基础研究
收稿日期:
出版日期:
通信作者:
Bo ZOU1,†(), Xiao-bo WU1, Guang-wen LU1, Shan-dan HE1, Jia-xing YANG1, Jing XIAO1
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Corresponding author:
邹波, 吴箫博, 卢广文, 何珊丹, 阳佳兴, 肖静. 基于混沌理论的嚼肌表面肌电信号分析[J/OL]. 中华口腔医学研究杂志(电子版), 2009, 3(06): 593-597.
Bo ZOU, Xiao-bo WU, Guang-wen LU, Shan-dan HE, Jia-xing YANG, Jing XIAO. Largest lyapunov exponents analysis of the surface electromyograph signal of the masseter[J/OL]. Chinese Journal of Stomatological Research(Electronic Edition), 2009, 3(06): 593-597.
目的
用非线性理论来分析嚼肌表面肌电信号，验证咀嚼肌表面肌电信号的混沌特征。
方法
采集20 名年轻男女个体的嚼肌在牙尖交错位（ICP）紧咬时的表面肌电信号，利用小数据量法计算肌电信号的最大李亚普诺夫（Lyapunov）指数。
结果
在Matlab 软件平台上开发了计算最大Lyapunov 指数的程序，计算出嚼肌表面肌电的最大Lyapunov 指数。男性个体左右两侧嚼肌最大Lyapunov 指数分别为17.882±1.7498、18.244±1.3028，女性为14.839±1.8198、14.866±1.3947，均为大于零的数值。
结论
嚼肌ICP 紧咬时的表面肌电信号具有混沌动力学特征，提示咀嚼肌肌电信号适合采用非线性动力学的方法进行分析。
Objective
To analyze the surface electromyogragh （EMG） signal of the masseter in the intercuspal position （ICP）， and testify the chaos character of the surface EMG of the muscles of mastication system.
Methods
10 male and 10 female young volunteers were involved in this study， the signals of surface EMG of bilateral masseter in ICP were collected.The largest Lyapunov exponents of the EMG signals were calculated using a method from small data sets.
Results
Based on the platform of Matlab， a program was developed to calculate the largest Lyapunov exponents， the bilateral means of largest Lyapunov exponents of male were 17.882 ± 1.7498 and 18.244 ± 1.3028， while the exponents of female were 14.839 ± 1.8198 and 14.866 ± 1.3947， all the data were positive values.
Conclusions
The signal of surface EMG of the masseter in ICP had the character of chaos， the method of nonlinear dynamics was applicable in analyzing the EMG signals of mastication system.