von Hofsten C, Rönnqvist L
Department of Psychology, Umeå University, Sweden.
Child Dev. 1993 Aug;64(4):1046-57.
The organization and structuring of spontaneous arm movements of 8 neonates were studied quantitatively. The movements were divided up into units, each consisting of 1 acceleration and 1 deceleration phase. This analysis showed that the movements had a distinct temporal structuring. An analysis of curvature was also performed, and it showed that the most distinct changes in movement direction occurred at the transitions between movement units. Finally, the movements of the 2 arms were found to be coupled in all 3 dimensions of space. They had a clear tendency to move together along the body's longitudinal axis, abduct and adduct together, and extend together in the forward direction.
对8名新生儿自发手臂运动的组织和结构进行了定量研究。这些运动被划分为多个单元，每个单元由1个加速阶段和1个减速阶段组成。该分析表明，这些运动具有明显的时间结构。还进行了曲率分析，结果表明运动方向最明显的变化发生在运动单元之间的过渡处。最后，发现双臂的运动在空间的所有三个维度上都是耦合的。它们明显倾向于沿着身体的纵轴一起移动，一起外展和内收，并一起向前伸展。
