期刊
HUMAN MOVEMENT SCIENCE
卷 32, 期 4, 页码 768-784出版社
ELSEVIER
DOI: 10.1016/j.humov.2013.04.002
关键词
Coordination; Reaching; Uncontrolled manifold analysis; Aging
资金
- National Institute of Neurological Disorders and Stroke [NS050880]
Differences in joint coordination between arms and due to aging were studied in healthy young and older adults reaching to either a fixed, central target or to the same target when it could unexpectedly change location after reach initiation. Joint coordination was investigated by artificially removing the covariation of each joint's motions with other joints' motions. Uncontrolled manifold analysis was used to partition joint configuration variance into variance reflecting motor abundance (V-UCM) and variance causing hand path variability (V-ORT). The extent to which V-ORT, related to the consistency of the hand path, increased after removing a joint's covariation indicated the strength of its coordination with other joints. Young adults exhibited stronger indices of joint coordination, evidenced by a larger increase in V-ORT after removing joint covariation than for older adults. This effect was more striking for the dominant right compared to the left arm for young adults, but not for older adults, especially with target uncertainty. The results indicate that interjoint coordination in young adults leads to less hand path variability compared to older adults. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据