在爆炸性自发收缩期间的皮层脊髓刺激性及其与快速扭矩生产的关联
Federico Castelli1, Omar S Mian1, Adam Bruton1,2
1School of Life and Health Sciences, Whitelands College, University of Roehampton, London, UK.
The European journal of neuroscience
|November 19, 2025
概括
在爆炸性收缩期间,皮质脊髓刺激性和抑制性增加,影响快速扭矩产生. 这些神经因素是爆炸性自愿肌肉力量的关键决定因素.
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:
- 了解爆炸性自愿收缩背后的神经机制对于优化运动表现和康复至关重要.
- 在快速扭矩发展过程中皮质脊髓刺激性和抑制之间的关系仍然不完全理解.
研究的目的:
- 为了研究在爆炸性收缩期间快速扭矩产生与皮质脊髓刺激 (运动唤起的潜力;MEP) 和抑制 (静止期持续时间;SPD) 之间的关联.
- 检查MEP和SPD在爆炸性收缩的不同阶段以及最大自愿收缩 (MVC) 平原中的变化.
主要方法:
- 14名成年参与者进行了对称的膝盖伸缩器爆炸性收缩.
- 在早期,中期和晚期阶段,以及在MVC平原期,用于测量四头肌肌中的MEP和SPD.
- 扭矩同时测量,统计分析包括重复测量相关性,斯皮尔曼rho相关性和线性混合效应模型.
主要成果:
- 在爆发性收缩的早期阶段,MEP和扭矩与参与者相关 (r=0.43,p<0.001).
- 在中间阶段,MEP和扭矩在参与者之间有显著的相关性 (rho=0.73,p=0.004).
- 绝对MEP,正常化MEP和SPD都在收缩阶段显著增加,直到MVC高原 (p<0.025).
结论:
- 在爆炸性收缩期间,皮质脊髓刺激似乎是决定快速扭矩生成的重要因素.
- 在整个扭矩-时间曲线中,皮质脊髓抑制和刺激性都逐渐增加,在MVC高原达到峰值.
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