与典型的发育儿童相比,患有发育协调障碍的儿童在收缩期间的运动单元发射速率特征变化较小
Maaike Esselaar1,2, Johnny V V Parr1,2, Greg Wood1,2
1Department of Sport and Exercise Sciences, Manchester Metropolitan University, Manchester, United Kingdom.
Frontiers in human neuroscience
|December 25, 2023
概括
患有发育协调障碍 (DCD) 的儿童表现出类似的平均运动单元特征,但与典型发育的同龄人相比,发射的变化较小. 这表明DCD.在DCD中有一个更为严格的力量控制策略.
科学领域:
- 神经科学是一个神经科学.
- 发育儿科 发育儿科
- 发动机控制器的控制器
背景情况:
- 发育协调障碍 (DCD) 与骨肌肉活动的改变有关,这表明受影响儿童的独特运动控制策略.
- 了解运动单元的招募和发射率是阐明DCD神经肌肉控制细微差别的关键.
- 之前的研究还没有深入探讨DDC儿童的精细运动单元功能细节.
研究的目的:
- 为了比较典型发育 (TD) 儿童和患有DCD的儿童在低水平握手收缩期间的运动单元特征.
- 为了研究这些群体之间的发动机单元燃烧率和控制策略的差异.
主要方法:
- 18名儿童 (9 TD, 9 DCD) 在最大自愿收缩的10%时进行了手握收缩.
- 高密度表面电肌图记录了第一个背内骨肌的肌肉活动.
- 动力单元的动力电位列被分解,以分析火速和脉冲间隔等特征,控制力稳定性 (变量系数<10%).
主要成果:
- 尽管有年龄差异,但在TD和DCD组之间平均运动单元数,发射率或脉冲间隔方面没有发现显著差异.
- 与TD儿童相比,患有DCD的儿童在运动单元发射统计数据 (脉冲间隔变化系数) 中的变化明显较小.
- DCD组在收缩过程中显示出更一致,更不变的电机单元发射模式.
结论:
- 尽管平均运动单元功能相似,但患有DCD的儿童可能会采用更固定的或更严格的策略来稳定力.
- 在DCD中发动机单元发射的变化减少,需要进一步研究其在电机控制和掌握任务中的作用.
- 未来的研究应该探讨动力单元发射变异性对DCD和典型发育儿童的影响.
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