Quantitative assessment of right and left reaching movements in infants:: A longitudinal study from 6 to 36 months
Quantitative assessment of right and left reaching movements in infants:: A longitudinal study from 6 to 36 months
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DOI：
10.1002/dev.20160
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发表时间：
2006-09-01
影响因子：
2.2
通讯作者：
Domellof, Erik
中科院分区：
文献类型：
--
作者：
Ronnqvist, Louise;Domellof, Erik
本纵向研究旨在探讨运动学偏侧化的早期存在和发展模式及其与侧边使用的关系。为了做到这一点，3-D运动学测量以及2-D视频记录的右，左达到运动，先后进行了17名婴儿在6，9，12，36个月。在36个月时对手部偏好进行了额外调查。由于四名婴儿早产，他们的结果与足月参与者的结果进行了比较。虽然大多数婴儿在早期年龄表现出相当不一致的偏好，在频率和分布的左右侧使用，达到运动学的分析揭示了一个更一致的模式，更少的运动单位（MU）和直的右侧达到大多数婴儿在所有测试的年龄。然而，从早产儿达到运动学通常更多变，少侧一致性。有人建议，人类利手的发展起源于早期的右臂，而不是手的偏好，在表示不对称的双边预测（参与手臂运动）发展之前对侧的预测（参与精细的手/手指运动）。(c)2006 Wiley Periodicals，Inc.
This longitudinal study aimed to explore the early presence and developmental pattern of laterality in reaching kinematics and its relationship to side use. In order to do so, 3-D kinematic measurements as well as 2-D video recordings of right-left reaching movements were successively carried out for 17 infants at the ages of 6, 9, 12, and 36 months. Additional investigations of hand preference were made at 36 months. As four infants were prematurely born, their outcomes were compared to those of the fullterm participants. While most of the infants in the early ages showed a rather inconsistent preference in terms of frequency and distributions of right-left side use, the analyses of reaching kinematics revealed a more consistent pattern of fewer movements units (MUs) and straighter right-sided reaching for the majority of infants at all tested ages. However, reaching kinematics from the preterm infants were generally more variable and less side consistent. It is proposed that the development of human handedness originates from an early right arm rather than hand preference in that representations of asymmetry in bilateral projections (involved in arm movements) developmentally precede contralateral projections (involved in refined hand/finger movements). (c) 2006 Wiley Periodicals, Inc.