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局部振动会诱导脊髓和皮质脊髓刺激能力的变化,在振动和对手肌肉中产生变化
Nicolas Amiez1, Alain Martin1, Jérémie Gaveau1
1Inserm UMR 1093-CAPS, UFR des Sciences du Sport, Institut National de la Santé et de la Recherche Médicale: UMR 1093, Université de Bourgogne, Dijon, France.
Journal of neurophysiology
|January 10, 2024
概括
对肌肉施加的局部振动 (LV) 会导致震动肌肉的持久力量损失. 这种神经肌肉刺激会影响振动肌肉和对手肌肉的脊髓和皮质刺激能力.
科学领域:
- 神经科学是一个神经科学.
- 发动机控制器的控制器
- 人体生理学 人体生理学
背景情况:
- 局部振动 (LV) 激活肌肉脊柱的初级 (Ia) afferents,影响脊髓和皮质通路.
- 之前的研究经常忽视脊柱的影响,在评估皮质刺激性由于振动而发生的变化时.
研究的目的:
- 为了研究30分钟LV诱导手伸展幻觉后震动 (flexor carpi radialis) 和对手 (extensor carpi radialis) 肌肉的神经肌肉变化.
- 为了区分脊髓和皮质对神经肌肉刺激性转移的贡献.
主要方法:
- 用于强度评估的最大自愿同度收缩 (MVIC).
- 运动唤起的潜能 (MEPs) 和骨运动唤起的潜能 (CMEPs) 来评估皮质脊髓和运动神经元的刺激性.
- 霍夫曼反射 (H-反射) 评估脊柱反射刺激能力.
- 在LV协议之前和之后的间隔进行的测量.
主要成果:
- 只有在振动肌肉中观察到持续的力量减少.
- 这两种肌肉的CMEP都下降了,这表明阿尔法运动神经元刺激性降低了.
- 欧洲议会议员仅在振动肌肉下降,而欧洲议会议员/CMEP比率增加,表明皮质刺激性增强.
- 在振动肌肉和对手肌肉中,H反射显著下降.
结论:
- 在脊髓和皮质层面,LV诱导神经肌肉变化,影响振动肌肉和对手肌肉.
- LV降低了阿尔法电动神经元的刺激性,增加了皮质刺激性.
- 必须考虑脊柱障碍,以准确地解释运动区域的兴奋性变化.
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