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当使用两种不同的方法来确定跨磁刺激器输出时,自愿激活不会有差异.

Christina D Bruce1, Justine R Magnuson1, Chris J McNeil1

  • 1Integrated Neuromuscular Physiology Laboratory, Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, Kelowna, British Columbia, Canada.

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概括

目前用跨磁刺激 (TMS) 测量自愿激活 (VA) 的方法可能会低估结果. 一种新的方法,SOSIT,提供类似的VA测量与简化程序,减少参与者的疲劳.

关键词:
肘部曲器 肘部曲器 肘部曲器估计休息时间抽刺激器强度的强度.跨的磁性刺激这是自愿激活的.

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科学领域:

  • 神经肌肉生理学 神经肌肉生理学
  • 发动机控制器的控制器
  • 人类运动科学科学 人类运动科学

背景情况:

  • 目前使用跨磁刺激 (TMS) 测量自愿激活 (VA) 的指导方针建议根据对手肌肉运动唤起潜力 (MEP) 大小限制刺激器输出 (SO).
  • 这种旨在防止对手肌肉污染的限制,可能导致亚最大激素反应 (叠加抽[SIT]和估计休息抽[ERT]),可能低估VA.
  • 在肘部曲器中,VA评估的准确性对于了解肌肉功能和疲劳至关重要.

研究的目的:

  • 用标准方法 (SOMEP,基于对手MEP大小的强度) 计算的肘部曲器VA与新方法 (SOSIT,仅基于50% MVC扭矩的最大SIT振幅的强度) 进行比较.
  • 为了确定SOSIT方法与SOMEP方法相比是否产生不同的VA分数.
  • 在设备和程序方面评估SOSIT方法的实际优势.

主要方法:

  • 15名健康的年轻人参与了这项研究.
  • 参与者在100%,75%和50%的MVC扭矩下进行最大自愿收缩 (MVCs).
  • 经磁刺激 (TMS) 在两个刺激器输出处进行:SOMEP (基于对手MEP大小) 和SOSIT (基于最大SIT振幅),每组5组.

主要成果:

  • 虽然SOSIT (15.2Nm) 与SOMEP (13.0Nm) 相比,估计的静止抽 (ERT) 扭矩显著更大,但100% MVC扭矩的叠加抽 (SIT) 振幅在方法之间没有差异 (SOSIT:0.74Nm与SOMEP:0.69Nm).
  • 尽管在ERT中存在差异,但在SOMEP (94.6%) 和SOSIT (95.0%) 方法之间,自愿激活 (VA) 评分并没有显著不同.
  • SOSIT方法给出了与SOMEP方法相似的VA结果.

结论:

  • SOSIT方法根据最大叠加的抽幅度确定刺激器输出,提供与标准SOMEP方法相似的自愿激活 (VA) 测量.
  • 这一发现表明,目前对VA的TMS协议可能不一定低估了激活.
  • SOSIT方法通过简化程序,消除对抗体电肌图 (EMG) 记录和最大自发收缩 (MVC) 进行刺激器输出确定的需要,从而减少潜在的疲劳,从而提供了实际的好处.