在双重任务范式中,姿势协调的变化
Rezvan Azimi1, Behrouz Abdoli1, Mohammad Ali Sanjari2
1Department of Cognitive and Behavioral Science and Technology in Sport, Faculty of Sport Sciences and Health, Shahid Beheshti University, Tehran, Iran.
Journal of motor behavior
|July 10, 2023
概括
认知任务通过增加姿势协同作用来改善姿势控制. 在没有认知任务的情况下站立,与双任务条件相比,质量中心 (CoM) 摆动和变化更大.
科学领域:
- 生物力学 生物力学
- 发动机控制器的控制器
- 认知神经科学 认知神经科学
背景情况:
- 姿势控制对于日常活动至关重要.
- 人们越来越认识到对姿势控制的认知影响.
- 运动输出的变化和关节协调模式是姿势控制的关键方面.
研究的目的:
- 为了研究认知负载对姿势控制的影响,使用不受控制的多重 (UCM) 框架.
- 分析不同认知任务困难如何影响姿势摆动和关节协调协同作用.
主要方法:
- 30名健康的年轻志愿者参与了这项研究.
- 参与者在三个条件下静静地站在狭窄的块上:没有认知任务 (NB),轻松的认知任务 (NBE) 和困难的认知任务 (NBD).
- 使用无控制多重 (UCM) 框架将关节方差分解为影响质量中心 (CoM) 稳定性 (VUCM) 和可变性 (VORT) 的组件.
主要成果:
- 质量中心前后 (CoMAP) 摆动在NB条件下明显高于NBE和NBD条件.
- 在NB条件下,CoM的变化率 (VORT) 显著高于在NBE和NBD条件下.
- 按协同指数衡量的姿势协同效应在双重任务条件下 (NBE和NBD) 与NB条件相比增加.
结论:
- 认知任务通过增加姿势协同作用的稳定性来增强姿势控制.
- 在站立时参与认知任务可以减少姿势摇摆和变化.
- 该UCM框架有效地区分认知负载对姿势控制策略的影响.
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