Effect of Low-Frequency Vibration on Muscle Response under Different Neurointact Conditions
Effect of Low-Frequency Vibration on Muscle Response under Different Neurointact Conditions
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不同神经完整条件下低频振动对肌肉反应的影响
DOI：
10.1155/2019/1971045
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发表时间：
2019-01
影响因子：
2.2
通讯作者：
Bo Cheng
中科院分区：
文献类型：
--
作者：
Chaofei Zhang;Wwenjun Wang;Dennis Anderson;Sishu Guan;Guofa Li;Hongyi Xiang;Hui Zhao;Bo Cheng
牵张反射是影响人体在全身振动下生物力学响应的重要因素。然而，在较低频率下缺乏定量评估。因此，本研究的目的是调查振动对牵张反射的影响，特别是，探索动态肌肉反应和低频振动之间的定量关系。解剖45只SD大鼠的腓肠肌。在腓肠肌预延长2 mm或3 mm后，施加5个离散频率（2~16 Hz）、峰-峰振幅为1 mm的正弦振动。变量，包括动态肌肉力量，振动加速度和位移记录在两种情况下，有和没有牵张反射。结果表明，牵张反射阻断后，2 mm预延长组动态肌力平均下降20%，3 mm预延长组下降24%。统计学分析表明，牵张反射条件下的动态肌力幅值显著大于无牵张反射条件下的动态肌力幅值（P < 0.001）。张力-长度曲线是一个随频率变化的非线性磁滞回线。振动频率对动态肌力与长度变化之间的相位差有显著影响（p < 0.01），最小频率为4- 8Hz。本研究的实验结果可为建立低频振动牵张反射模型提供理论支持。
Stretch reflex is an important factor that influences the biomechanical response of the human body under whole-body vibration. However, there is a lack of quantitative evaluation at lower frequencies. Thus, the aim of this study was to investigate the effects of vibration on the stretch reflex and, in particular, to explore the quantitative relationship between dynamic muscle responses and low-frequency vibrations. The gastrocnemius muscle of 45 Sprague-Dawley rats was dissected. Sinusoidal vibrations of five discrete frequencies (2~16 Hz) with peak-to-peak amplitudes of 1 mm were applied to the gastrocnemius muscles with 2 mm or 3 mm prelengthening. Variables including dynamic muscle force, vibration acceleration, and displacement were recorded in two conditions, with and without the stretch reflex. Results showed that the dynamic muscle forces decreased by 20% on average for the 2 mm prelengthening group after the stretch reflex was blocked and by 24% for the 3 mm prelengthening group. Statistical analysis indicated that the amplitude of dynamic muscle force in the “with stretch reflex” condition was significantly larger than that in the “without stretch reflex” condition (p < 0.001). The tension-length curve was found to be a nonlinear hysteresis loop that changed with frequency. The phase difference between the dynamic muscle force and the length change was affected significantly by vibration frequency (p < 0.01), and the minimum frequency was 4–8 Hz. Experimental results of this study could benefit musculoskeletal model by providing a theoretical support to build a stretch reflex model for low-frequency vibration.
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DOI：
10.1115/1.1531112
发表时间：
2003-02-01
影响因子：
1.7
作者：
Thelen, DG
通讯作者：
Thelen, DG
影响因子：
5.5
作者：
BIGLAND, B;LIPPOLD, OCJ
通讯作者：
LIPPOLD, OCJ
DOI：
10.1098/rspb.1938.0050
发表时间：
1938-10-01
期刊：
PROCEEDINGS OF THE ROYAL SOCIETY SERIES B-BIOLOGICAL SCIENCES
影响因子：
--
作者：
Hill, AV
通讯作者：
Hill, AV
DOI：
10.1113/jphysiol.1959.sp006260
发表时间：
1959-10
期刊：
The Journal of Physiology
影响因子：
--
作者：
P. Matthews
通讯作者：
P. Matthews
影响因子：
4.7
作者：
Kitazaki, S;Griffin, MJ
通讯作者：
Griffin, MJ