基于格兰杰因果性的行走状态下脑肌电同步分析
发布时间：2019-06-21 06:54
【摘要】：为了研究健康人在行走过程中大脑皮层与肌肉间的功能性关联,探究正走与倒走过程中该功能联系是否存在差异,分别对10名健康被试进行时长大于10 min的正走和倒走测试;基于格兰杰因果性算法(GC)对测试过程中同步采集到的头皮脑电(EEG)与表面肌电(EMG)信号进行分析,进一步定义不同节律下EEG和不同肌肉EMG的GC显著性面积指标,用以定量描述皮层-肌肉间的功能性耦合关系和信息流向,并分析脑电功率谱与该功能性耦合关系的联系。Wilcoxon非参数检验的结果显示,倒走过程中股直肌与胫骨前肌在EEG→EMG和EMG→EEG方向上alpha和beta节律的GC显著性面积指标较正走过程存在显著下降(P0.05);线性回归分析的结果显示,正走和倒走中的EEG功率谱峰值与EEG→EMG方向的GC峰值存在线性相关性(P0.05)。实验说明,健康人步行时EEG和EMG间存在方向性耦合关系,并且脑电alpha和beta节律参与步行中的控制反馈过程,从而证明该研究方法可以刻画大脑皮层与肌肉之间的同步特征与功能联系。
[Abstract]:In order to study the functional relationship between cerebral cortex and muscle in healthy people during walking, and to explore whether there was a difference in the functional relationship between walking and backward walking, 10 healthy subjects were tested for forward walking and backward walking for more than 10 min. Based on Granger causality algorithm (GC), the (EMG) signals of scalp EEG (EEG) and surface electromyography collected synchronously during the test were analyzed. The GC significant area indexes of EEG and different muscle EMG under different rhythms were further defined to quantitatively describe the functional coupling relationship and information flow between cortex and muscle. The relationship between EEG power spectrum and functional coupling was analyzed. Wilcoxon nonparametric test showed that the GC significant area index of alpha and beta rhythm of rectus femoris and anterior tibia muscle in EEG 鈮，
本文编号：2503879
[Abstract]:In order to study the functional relationship between cerebral cortex and muscle in healthy people during walking, and to explore whether there was a difference in the functional relationship between walking and backward walking, 10 healthy subjects were tested for forward walking and backward walking for more than 10 min. Based on Granger causality algorithm (GC), the (EMG) signals of scalp EEG (EEG) and surface electromyography collected synchronously during the test were analyzed. The GC significant area indexes of EEG and different muscle EMG under different rhythms were further defined to quantitatively describe the functional coupling relationship and information flow between cortex and muscle. The relationship between EEG power spectrum and functional coupling was analyzed. Wilcoxon nonparametric test showed that the GC significant area index of alpha and beta rhythm of rectus femoris and anterior tibia muscle in EEG 鈮，
本文编号：2503879
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