在同一个绝对力输出时,在同等对称,同心和偏心的肌肉动作之间,在起伏条件下的宫髓动力唤起的潜力中没有差异
Eoin Haigney1, Elliott Atkinson2, Paul Ansdell1
1Department of Sport, Exercise and Rehabilitation, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, Tyne and Wear, UK.
The European journal of neuroscience
|August 4, 2025
概括
视网脊椎管 (RST) 在等比,同心或偏心肌动作时,刺激能力没有变化. 这表明在低强度的不同收缩类型中,RST对运动神经元的输入一致.
科学领域:
- 神经科学是一个神经科学.
- 人体生理学 人体生理学
- 发动机控制器的控制器
背景情况:
- 人类的运动依赖于同度,同心和偏心肌肉动作的组合.
- 视网脊椎管 (RST) 在控制自愿运动方面发挥着至关重要的作用.
- 了解RST在不同肌肉活动中的贡献对于运动控制研究至关重要.
研究的目的:
- 为了研究视网脊椎管 (RST) 在等比,同心和偏心肌动作过程中的刺激性.
- 为了确定RST的神经输出是否根据肌肉收缩的类型而有所不同.
- 评估RST在各种收缩模式期间调节运动神经元活动中的作用.
主要方法:
- 利用宫骨髓动力唤起潜力 (CMEPs) 来测量RST刺激性.
- 使用惊人的听觉刺激来影响CMEP的反应.
- 参与者进行了副最大的 (25% MVC) 双肩手臂的同度,同心和偏心收缩.
主要成果:
- 在所有肌肉动作中,有条件的CMEP反应明显大于无条件的反应 (p=0.008).
- 在同位,同心和偏心肌动作之间没有发现RST兴奋度的显著差异 (p=0.319).
- 有条件和无条件CMEP之间的差异,这是RST刺激性的指标,保持一致.
结论:
- 在微最大收缩强度下,视网脊椎管的兴奋性在等比,同心和偏心肌动作之间没有差异.
- 在这些实验条件下,无论肌肉的动作类型如何,RST输入到运动神经元似乎都是一致的.
- 这些发现有助于更深入地了解动态人类运动期间的运动控制机制.
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