一种增加神经肌肉电刺激刺激持续时间的新型调制策略。
A novel modulation strategy to increase stimulation duration in neuromuscular electrical stimulation.
机构信息
Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611-6250, USA.
出版信息
Muscle Nerve. 2011 Sep;44(3):382-7. doi: 10.1002/mus.22058.
INTRODUCTION
Neuromuscular electrical stimulation (NMES) has been shown to be an effective treatment for muscular dysfunction. Yet, a fundamental barrier to NMES treatments is the rapid onset of muscle fatigue. The purpose of this study is to examine the effect of feedback-based frequency modulation on the closed-loop performance of the quadriceps during repeated dynamic contractions.
METHODS
In the first experiment, subjects completed four different frequency modulation NMES protocols utilizing the same amplitude modulation control to compare the successful run times (SRTs). A second experiment was performed to determine the change in muscle response to high- and low-frequency stimulation.
RESULTS
Compared with constant-frequency stimulation, results indicate that using an error-driven strategy to vary the stimulation frequency during amplitude modulation increases the number of successful contractions during non-isometric conditions.
CONCLUSION
Simultaneous frequency and amplitude modulation increases the SRT during closed-loop NMES control.
简介
神经肌肉电刺激（NMES）已被证明是治疗肌肉功能障碍的有效方法。然而，NMES 治疗的一个基本障碍是肌肉疲劳的快速发生。本研究的目的是研究基于反馈的频率调制对股四头肌在重复动态收缩期间闭环性能的影响。
方法
在第一个实验中，受试者使用相同的幅度调制控制完成了四个不同的频率调制 NMES 方案，以比较成功运行时间（SRT）。进行了第二个实验以确定肌肉对高频和低频刺激的反应变化。
结果
与恒频刺激相比，结果表明，在幅度调制期间使用基于误差的策略来改变刺激频率可增加非等长条件下成功收缩的次数。
结论
在闭环 NMES 控制中同时进行频率和幅度调制可增加 SRT。
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