通过高密度表面电力学图,通过较低和较高值动力单元行为的性别相关差异的特征
Edoardo Lecce1, Alessandra Conti1, Stefano Nuccio1
1Department of Movement, Human and Health Sciences, Laboratory of Exercise Physiology, University of Rome 'Foro Italico', Rome, Italy.
Experimental physiology
|June 18, 2024
概括
男性和女性运动单元在收缩期间表现出不同的神经控制策略. 女性在低值运动单元中表现出更高的神经驱动力,而男性在高值单元中表现出更高的神经驱动力,揭示出性别特异的发射模式.
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:
- 了解神经控制中的基于性别的差异对于理解不同任务和强度的神经肌肉生理学至关重要.
- 以前的研究还没有完全阐明男性和女性在不同的收缩强度期间是否表现出类似的神经控制机制.
研究的目的:
- 在广泛的强度范围内调查与性别相关的运动单元行为在同度收缩期间的差异.
- 为了比较男性和女性运动单元之间的神经驱动,放电率和招募/退出招募属性.
主要方法:
- 高密度电肌图 (EMG) 在最大自愿力 (MVF) 的35%和70%的梯形同度收缩期间记录了双腕活动.
- 发动机单位被分为低值 (≤30%MVF) 和高值 (>30%MVF).
- 评估的关键参数包括放电率,间尖区间变化,招聘/退聘门和神经驱动.
主要成果:
- 与男性相比,女性低值运动单元表现出较高的神经驱动和放电率.
- 男性高值运动单元表现出更高的神经驱动和放电率.
- 男性的招聘和退聘门较高,但两性都表现出类似的激活和停用策略.
结论:
- 在发动机单元发射策略中存在显著的性别差异,特别是在任务强度方面.
- 女性运动单元的特点是较低值单元的神经驱动和放电率较高,而男性在较高值单元中表现出这一点.
- 尽管值存在差异,但激活和关闭模式在两性之间保持不变,这表明细微但共同的运动控制原则.
更多相关视频
相关概念视频
01:20Motor Unit Stimulation
1.5K
When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
1.5K
01:13Motor Units
3.9K
The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
Motor units come in different sizes, with smaller units...
3.9K