双重500μs宽脉冲神经肌肉电刺激增强了感觉运动皮层刺激能力
Yun Zhao1, Yanying Yan1, Xiaoling Zhang1
1School of Smart Health, Chongqing Polytechnic University of Electronic Technology, Chongqing, China.
Frontiers in human neuroscience
|August 12, 2025
概括
使用宽脉冲变频列车 (wDFT) 的神经肌肉电刺激 (NMES) 显著提高了感觉运动皮层刺激能力. 这种优化的NMES模式显示了提高运动康复结果的巨大潜力.
科学领域:
- 神经科学是一个神经科学.
- 康复医学 康复医学 康复医学
- 生物医学工程 生物医学工程
背景情况:
- 神经肌肉电刺激 (NMES) 对运动功能障碍至关重要,但需要优化参数来提高皮质活动.
- 通过NMES增强感官运动皮质刺激性是有效的运动康复策略的关键.
研究的目的:
- 调查宽脉冲变频列车 (wDFT) 与其他NMES模式相比,是否可以改善感官运动皮质刺激性.
- 为了确定最佳的NMES刺激参数,以增强皮质激活.
主要方法:
- 一个使用NMES在健康成年人双肩肌肌肉上的块设计实验.
- 四个NMES模式的比较:wDFT,窄脉冲VFT (nVFT),窄脉冲CFT (nCFT) 和宽脉冲CFT (wCFT).
- 通过贝塔事件相关脱同步 (ERD) 分析评估感觉运动皮层刺激性.
主要成果:
- 变频列车 (VFT) 诱导的皮质活动比常频列车 (CFT) 强.
- 双重500微秒宽脉冲VFT (wDFT) 模式引起了显著更大的感觉运动皮层反应.
- wDFT表现出最高的βERD强度和下降斜率,表明皮层调制效率优越.
结论:
- 变频列车,特别是wDFT,有效地增强感官运动皮质刺激能力.
- 通过wDFT改善的中枢神经活动可能是由于增强的 afferent 纤维激活.
- 在运动康复应用中,wDFT具有优化NMES的巨大潜力.
相关概念视频
01:20Motor Unit Stimulation
2.0K
When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
2.0K
01:22Muscle Stimulation Frequency
2.6K
The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
2.6K