在精神疲劳后的第一个脊椎骨干中神经肌肉行为
Michael J Marsala1, Anita D Christie1
1School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, Ontario, Canada.
Experimental physiology
|December 22, 2023
概括
精神疲劳会影响反应时间,并增加男性和女性的主观疲劳. 然而,神经肌肉功能并没有受到男性或女性精神疲劳的特别影响.
科学领域:
- 运动生理学 运动生理学
- 神经科学是一个神经科学.
- 人类表现的人类表现.
背景情况:
- 精神疲劳是影响认知和身体表现的日益严重的问题.
- 了解性别特异性对精神疲劳的反应对于优化干预至关重要.
- 之前的研究对心理疲劳的生理影响产生了不同的结果.
研究的目的:
- 为了研究精神疲劳任务后神经肌肉功能的性别特异性改变.
- 为了确定精神疲劳是否对男性和女性的生理反应产生不同的影响.
- 评估反应时间的变化,动力单元活动和力产生精度的变化.
主要方法:
- 25名健康成年人 (13名女性,12名男性) 参加了一项随机交叉研究.
- 参与者在不同的日子完成了30分钟的精神疲劳任务和对照条件.
- 在每种条件之前和之后评估了第一个背部骨内的神经肌肉功能,包括测量反应时间,运动单元的发射速度和可变力的收缩精度.
主要成果:
- 在男性和女性中,精神疲劳显著减少了反应时间,增加了主观疲劳水平.
- 运动单元的发射速度在不同最大自发收缩 (MVC) 强度下呈现时间变化,不依性或精神疲劳.
- 虽然力量产生错误在变量收缩期间随着时间的推移在性别之间发生了不同的变化,但这些变化并不特定于精神疲劳.
结论:
- 精神疲劳会影响认知方面,如反应时间和对努力的主观感知,但不会特别改变年轻健康成年人的神经肌肉生理功能.
- 在神经肌肉对精神疲劳的反应中没有观察到明显的性别特异.
- 需要进一步的研究来探索中央疲劳机制或不同人群中的潜在性别差异.
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