Goal directed reaching and postural control in supine position in healthy infants
Goal directed reaching and postural control in supine position in healthy infants
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DOI：
10.1016/s0166-4328(00)00231-x
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发表时间：
2000-10-01
影响因子：
2.7
通讯作者：
Hadders-Algra, M
中科院分区：
文献类型：
--
作者：
Fallang, B;Saugstad, OD;Hadders-Algra, M
本研究主要关注幼儿仰卧位的伸展和姿势的发展及其相互作用。本文记录了12例4、6月龄健康足月婴儿的目标指向运动及颅-尾侧和中外侧方向的全身压力中心（COP）同步地反力。从8名婴儿中获得了两个年龄段的数据。结果表明，4 ~ 6个月时，宝宝仰卧位时的体位稳定性增加，内侧外侧方向的COP振荡位移随年龄的增加而明显减少。与此同时，到达性能也有所提高，这反映在移动单位（MU）的数量减少，手的位移路径长度减少，第一个MU的长度和持续时间增加。在两个年龄段，到达运动的运动学数据与COP数据都是相关的，但关系的性质发生了变化。在4月龄时，MU的数量与颅尾方向的COP振荡次数有关，而在6月龄时，手部运动的最大速度与颅尾方向和中外侧方向的COP位移的最大速度有关。这一变化可能表明在仰卧位到达运动时对姿势调整的更微妙的控制。(C) 2000 Elsevier Science B.V.版权所有
The present study focussed on the development and interaction of reaching and posture in supine position in young infants. The kinematics of goal directed reaches and the concurrent ground reaction forces of the total body centre of pressure (COP) in cranial-caudal and medial-lateral direction were recorded in twelve healthy fullterm infants at 4 and 6 months of age. From eight infants, data were available at both ages. The results indicated that between 4 and 6 months, postural stability during reaching in supine position increased, as the oscillatory COP displacement in the medial-lateral direction decreased significantly with increasing age. Concurrently, reaching performance improved, which was reflected by a decrease in the number of movement units (MU), the length of the displacement-path of the hand and an increase of the length and duration of the first MU. The kinematic data of the reaching movements and the COP data were correlated at both ages, but the nature of the relation changed. At 4 months of age, the number of MU was related to the number of COP oscillations in the cranial-caudal direction, whereas at 6 months the maximum velocity of the hand movement was related to the maximum velocity of COP displacement in cranial-caudal and medial-lateral direction. This change might point to the development of a more subtle control of postural adjustments during reaching movements in supine position. (C) 2000 Elsevier Science B.V. All rights reserved.