Loria C
Phys Ther. 1980 Feb;60(2):167-72. doi: 10.1093/ptj/60.2.167.
This study questions the validity of the principle of a proximo-distal direction of motor development and the idea that distal skill emerges out of and is dependent upon proximal control. To determine the relationship between proximal and distal motor function, 12 normal infants (9 girls, 3 boys), 30-weeks of age, were recorded on videotape while reaching for a one-inch red cube contained in a specially designed form board. Their visually guided reaching (proximal) ability and prehensile (distal) skills were rated on nonstandardized scales. No significant linear relationship was found between proximal and distal motor behavior. The conclusion that distal development does not necessarily follow proximal motor development is offered. The possibility that two different motor-control systems governin; proximal and distal function is considered. Reconsideration of the proximo-distal sequences currently used in treating motor-system dysfunction is recommended.
本研究对运动发育由近端向远端方向发展的原则以及远端技能源于并依赖近端控制这一观点的有效性提出质疑。为确定近端和远端运动功能之间的关系，对12名30周龄的正常婴儿（9名女孩，3名男孩）进行录像，他们伸手去拿特制模板中一个一英寸的红色立方体。根据非标准化量表对他们的视觉引导伸手（近端）能力和抓握（远端）技能进行评分。未发现近端和远端运动行为之间存在显著的线性关系。得出远端发育不一定遵循近端运动发育的结论。考虑了存在两个不同的运动控制系统分别控制近端和远端功能的可能性。建议重新审视目前用于治疗运动系统功能障碍的近端到远端顺序。
