Age-related differentiation of sensorimotor control strategies during pursuit and compensatory tracking.
Age-related differentiation of sensorimotor control strategies during pursuit and compensatory tracking.
复制标题
追踪和补偿跟踪过程中感觉运动控制策略与年龄相关的分化。
DOI：
10.1109/embc.2014.6944392
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Beardsley,ScottA
中科院分区：
文献类型：
--
作者：
Heenan,Megan;Scheidt,RobertA;Beardsley,ScottA
衰老过程中的运动控制缺陷已有充分记录。已经假设了神经运动衰退的多种原因，包括外周和中枢神经功能缺陷。在这里，我们使用闭环感觉运动控制模型来检查衰老过程中运动控制缺陷的功能性原因。我们招募了 14 名年龄在 19-61 岁之间的受试者参加一项研究，他们用惯用手执行单关节补偿和追踪任务。我们发现视觉反应延迟和视觉噪音随着年龄的增长而增加，而对视觉反馈的依赖，尤其是在补偿跟踪期间减少。视觉噪声的增加也与伸手和保持任务期间运动错误的增加呈正相关。结果表明，视觉运动控制系统内噪音的增加可能导致早期衰老过程中运动性能的下降。
Motor control deficits during aging have been well-documented. Various causes of neuromotor decline, including both peripheral and central neurological deficits, have been hypothesized. Here, we use a model of closed-loop sensorimotor control to examine the functional causes of motor control deficits during aging. We recruited 14 subjects aged 19-61 years old to participate in a study in which they performed single-joint compensatory and pursuit tracking tasks with their dominant hand. We found that visual response delay and visual noise increased with age, while reliance on visual feedback, especially during compensatory tracking decreased. Increases in visual noise were also positively correlated with increases in movement error during a reach and hold task. The results suggest an increase in noise within the visuomotor control system may contribute to the decline in motor performance during early aging.