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叠加的NMES对上肢和下肢肌肉中脊柱刺激性的频率依赖性影响

Riccardo Borzuola¹, Valerio Caricati¹, Martina Parrella¹

¹Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Rome, Italy.

|November 21, 2024

概括

将神经肌肉电刺激 (NMES) 叠加在自愿收缩上,可以增强脊柱上肢和下肢肌肉的刺激能力. 与较高频率 (80 Hz) 相比,低频率NMES (40 Hz) 产生了更大的H-反射强化.

科学领域:

神经科学是一个神经科学.
运动生理学运动生理学
发动机控制器的控制器

背景情况:

神经肌肉电刺激 (NMES) 叠加在自愿收缩上可以提高肌肉力量.
在皮层和脊髓层面的适应可能是NMES诱导的改善的基础.
对皮质脊柱激活的NMES影响似乎依赖于频率,并且在四肢肌肉之间有所不同.

研究的目的:

为了研究急性脊柱激发性反应NMES叠加在自愿的同度收缩 (NMES + ISO).
为了比较两个不同的NMES脉冲频率 (40Hz和80Hz) 对H-反射幅度的影响.
为了检查上肢 (flexor carpi radialis - FCR) 和下肢 (soleus - SOL) 肌肉的反应.

主要方法:

用叠加的NMES进行了15次间歇性最大值以下自愿收缩.
在每个NMES + ISO条件之前和之后,在FCR和SOL肌肉中测量了H反射幅度.
测试了两个NMES频率 (40Hz和80Hz).

主要成果:

在NMES + ISO之后,FCR和SOL肌肉的H反射幅度在40Hz和80Hz时显著增加.
与80Hz条件相比,在40Hz NMES条件下,H反射的强化显著增加.
在上肢 (FCR) 和下肢 (SOL) 肌肉之间没有观察到H反射增强的显著差异.

结论:

在自愿收缩上叠加NMES对上肢和下肢肌肉中脊柱运动神经元产生激发作用.
与高频NMES (80 Hz) 相比,低频NMES (40 Hz) 引起了更大的脊柱辅助反应.
这种脊柱促进可能归因于增强的体感传感输入与增加的脊柱上驱动相结合.

关键词:

在EMGEMGEMGEMGEMGEMGEMGEMGEM 柔软的手臂的半径 (Flexor carpi radialis) 是一个半径.这是一种H反射.神经肌肉电刺激是一种神经肌肉电刺激.刺激的频率是刺激的频率.

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