在一个视觉上倒置的摆形平衡任务,避免即将发生的跌倒变得越来越困难,因为我们年龄.
Hannah E Park1, Avijit Bakshi2, James R Lackner2
1Ashton Graybiel Spatial Orientation Laboratory, Brandeis University, MS 033, 415 South Street, Waltham, MA, 02453, USA. hepark@brandeis.edu.
Experimental brain research
|January 15, 2025
概括
年长的成年人 (OA) 在模拟的反转摆动任务中表现出比年轻的成年人 (YA) 更差的平衡控制,在接近跌倒时执行更少的纠正和更不稳定的操纵杆命令.
科学领域:
- 生物力学 生物力学
- 人类运动控制 人类运动控制
- 老年学是一门学科.
背景情况:
- 人的姿势控制涉及复杂的感官运动集成.
- 肌肉强度和反射反应的年龄相关变化会影响平衡.
- 视觉倒置 (VIP) 是研究平衡和控制的模型系统.
研究的目的:
- 为了比较年轻成年人 (YA) 和老年人 (OA) 的平衡控制策略,使用操纵杆控制的VIP.
- 调查模拟的与年龄相关的下降 (增长,延迟) 如何影响表现.
- 识别与落与恢复相关的不同的指挥动态.
主要方法:
- 参与者 (YA和OA) 使用操纵杆稳定了一个VIP.
- 操纵杆参数模拟了与年龄相关的肌肉衰弱和反射减缓.
- 性能指标包括落发生率,位置/速度差异,以及命令类型 (纠正,破坏稳定,不活跃).
主要成果:
- 年长的成年人比年轻的成年人有更高的跌倒发病率和更差的稳定性/变化性.
- 年长的成年人使用更少的纠正和更多的破坏稳定的命令,特别是当跌倒迫在眉时.
- 命令模式 (不活跃,纠正,破坏稳定) 预测下降时间.
- 较年长的成年人表现出较少的频率和及时的纠正命令相对于破坏稳定的命令.
结论:
- 老年人表现出与年龄相关的平衡控制缺陷,其特点是改变了运动指挥策略.
- 这些发现表明,运动控制中的决策过程随着年龄的增长而有所不同,尤其是在具有挑战性的条件下.
- 这些见解可能会为老年人群中预防跌倒的干预措施提供信息.
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