Cross-correlated fractal components of H-wave amplitude fluctuations in medial gastrocnemius and soleus muscles
Cross-correlated fractal components of H-wave amplitude fluctuations in medial gastrocnemius and soleus muscles
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DOI：
10.1016/j.neulet.2021.136264
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发表时间：
2021-10-01
影响因子：
2.5
通讯作者：
Kimura，Tetsuya
中科院分区：
文献类型：
--
作者：
Taki，Chinami;Nakata，Akio;Kimura，Tetsuya
比目鱼肌H波振幅的时间序列具有分形（长程）相关性，这归因于脊髓上中枢的输入。然而，这种长程幂律相关输入是否也有助于协同肌肉仍不清楚。因此，本研究的目的是检查用于跖屈的协同肌肉，即腓肠肌（MG）和SOL的内侧头之间的H波振幅波动的分形分量的相关性。在8名年轻男性参与者中，连续H反射记录几乎同时从MG和SOL在0.5 Hz的刺激频率为30 min。我们进行了去趋势移动平均互相关分析（DMCA）的H-和M-波振幅MG和SOL之间的时间序列，以评估存在一个共同的噪声输入有助于这些远程相关性。计算互相关系数ρ D M C A（-1至1）以量化两个不同时间序列之间的相关性强度。结果表明，MG和SOL的H波振幅之间存在显著的长程幂律相关（原始和随机混洗替代数据的ρ D M C A分别为0.50（0.22）和0.22（0.17），P< 0.05）。M波振幅则无显著性差异（ρ D M C A：0.29（0.23）和0.20（0.15），P> 0.05）。我们的结论是，有一个共同的噪音输入管理这些协同肌肉，可能是由于脊髓上的起源，造成长距离的幂律相关性在单突触反射。
The time series of the H-wave amplitude in soleus muscle (SOL) shows fractal (long-range) correlation, which is attributed to input from supraspinal centers. However, whether such long-range power-law correlated input also contributes to the synergistic muscles remains unclear. The purpose of this study was therefore to examine the correlation in the fractal components of H-wave amplitude fluctuations between the synergistic muscles used for plantar flexion, ie, the medial head of the gastrocnemius muscle (MG) and SOL. In eight young male participants, consecutive H-reflexes were recorded almost simultaneously from the MG and SOL at a stimulation frequency of 0.5 Hz for 30 min. We performed detrending moving-average cross-correlation analysis (DMCA) for each of the H-and M-wave amplitude time series between MG and SOL to assess the existence of a common noise input contributing to these long-range correlations. The cross-correlation coefficient ρ D M C A (-1 to 1) was calculated to quantify the strength of the correlation between two different time series. The results indicated a significant long-range power-law correlation between H-wave amplitudes in MG and SOL (ρ D M C A: 0.50 (0.22) and 0.22 (0.17), mean (standard deviation) for the original and randomly shuffled surrogate data, respectively, P< 0.05). This was not the case for M-wave amplitudes (ρ D M C A: 0.29 (0.23) and 0.20 (0.15), P> 0.05). We conclude that there is a common noise input governing these synergistic muscles, possibly due to supraspinal origin, causing long-range power-law correlations in monosynaptic reflexes.