牵张反射期间股四头肌的肌电图频谱差异。
EMG spectral differences among the quadriceps femoris during the stretch reflex.
作者信息
Beck Travis W, Simmons Jordon L, Defreitas Jason M
机构信息
University of Oklahoma, Department of Health and Exercise Science, 110 Huston Huffman Center, Norman, Oklahoma, 73019-6081, USA.
Oklahoma State University, Health and Human Performance Program, School of Applied Health and Educational Psychology, Stillwater, Oklahoma, USA.
出版信息
Muscle Nerve. 2015 Nov;52(5):826-31. doi: 10.1002/mus.24625. Epub 2015 Sep 3.
INTRODUCTION
The purpose of this study was to examine the electromyographic (EMG) spectral characteristics of the quadriceps femoris muscles during tendon tap stretch reflexes.
METHODS
Sixteen healthy subjects (mean ± SD age = 21.2 ± 2.8 years) performed tendon tap reflexes of the leg extensors as surface EMG signals were detected from the vastus lateralis (VL), rectus femoris (RF), and vastus medialis (VM) muscles of the dominant thigh. All EMG signals were processed with a wavelet analysis, and the resulting spectra were decomposed with nonparametric spectral decomposition.
RESULTS
The results showed that the spectra for the VL had significantly more high-frequency power than those for the RF and VM, with similar spectral shapes for the RF and VM.
CONCLUSIONS
These findings could be due to differences in the width of the innervation zone, or the fiber type composition of the muscles, although the latter seems to be more likely.
引言
本研究的目的是检查股四头肌在腱反射拉伸反射期间的肌电图（EMG）频谱特征。
方法
16名健康受试者（平均±标准差年龄 = 21.2 ± 2.8岁）进行腿部伸肌的腱反射，同时从优势大腿的股外侧肌（VL）、股直肌（RF）和股内侧肌（VM）检测表面肌电信号。所有肌电信号均采用小波分析进行处理，所得频谱通过非参数频谱分解进行分解。
结果
结果表明，VL的频谱比RF和VM的频谱具有明显更多的高频功率，RF和VM的频谱形状相似。
结论
这些发现可能是由于神经支配区宽度的差异，或者是肌肉纤维类型组成的差异，尽管后者似乎更有可能。
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