Age-related deficits in motor learning are associated with altered motor exploration strategies
Age-related deficits in motor learning are associated with altered motor exploration strategies
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DOI：
10.1016/j.neuroscience.2019.05.047
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发表时间：
2019-08-01
期刊：
影响因子：
3.3
通讯作者：
Ranganathan, Rajiv
中科院分区：
文献类型：
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作者：
Lee, Mei-Hua;Ranganathan, Rajiv
运动学习如何受到衰老的影响？虽然几个实验范式已被用来解决这个问题，有有限的重点运动学习的早期阶段，其中涉及到运动探索和需要协调多个自由度的身体。在这里，我们研究了身体-机器界面中的运动学习，其中我们测量了与年龄相关的任务表现差异以及这种表现背后的协调策略。参与者（N = 65;年龄范围18-72岁）在上身佩戴无线惯性测量单元，并学习控制屏幕上的光标，该光标由躯干的运动控制。结果显示，与先前的研究一致，运动时间存在与年龄相关的影响，中年和老年人比年轻人需要更长的时间来执行任务。然而，我们也发现这些变化与老年人的探索有限有关。此外，当考虑大部分寿命（包括儿童）的数据时，较长的运动时间与协调模式的效率更低有关，产生更多与任务无关的运动。这些结果表明，探索行为在运动学习受到影响，随着年龄的增长，并强调需要不同的实践策略。(C)2019年IBRO。由爱思唯尔有限公司出版。保留所有权利。
How is motor learning affected by aging? Although several experimental paradigms have been used to address this question, there has been limited focus on the early phase of motor learning, which involvesmotor exploration and the need to coordinate multiple degrees of freedom in the body. Here, we examined motor learning in a body-machine interface where wemeasured both age-related differences in task performance as well as the coordination strategies underlying this performance. Participants (N = 65; age range 18-72 years) wore wireless inertial measurement units on the upper body, and learned to control a cursor on a screen, which was controlled bymotions of the trunk. Results showed that, consistent with prior studies, there was an age-related effect on movement time, with middle-aged and older adults taking longer to perform the task than young adults. However, we also found that these changes were associated with limited exploration in older adults. Moreover, when considering data across a majority of the lifespan (including children), longer movement times were associated with greater inefficiency of the coordination pattern, producing more task-irrelevant motion. These results suggest exploration behaviors duringmotor learning are affected with aging, and highlight the need for different practice strategies with aging. (C) 2019 IBRO. Published by Elsevier Ltd. All rights reserved.