Centre for Research in the Psychology of Cognition, Language and Emotion, Aix-Marseille University, France.
Dev Med Child Neurol. 2010 Sep;52(9):850-5. doi: 10.1111/j.1469-8749.2009.03611.x. Epub 2010 Jan 28.
Postural control is a fundamental component of action in which deficits have been shown to contribute to motor difficulties in children with developmental coordination disorder (DCD). The purpose of this study was to examine anticipatory postural adjustments (APAs) in children with DCD in a bimanual load-lifting task.
Sixteen children with reported motor problems (two females, 14 males; mean age 9 y; SD 2 y) and 16 typically developing, age-matched children (six females, 10 males; mean age 9 y; SD 2 y) took part in the study. The task required the children to maintain a stable elbow angle, despite imposed or voluntary unloading of the forearm. APAs were assessed using electromyography and kinematics analysis.
Although children with DCD could compensate for the consequences of unloading, the results demonstrated that APAs were less efficient in children with DCD than in typically developing children. A positive and significant coefficient of regression between the flexor inhibition latency and the postural stabilization was only found in typically developing children.
The impaired fine-tuning of the muscle contribution and the poor stabilization performances demonstrate poor predictive modelling in DCD.
姿势控制是动作的一个基本组成部分，已有研究表明，发展性协调障碍（DCD）儿童存在姿势控制缺陷，这会导致其运动困难。本研究旨在探讨 DCD 儿童在双上肢负重抬举任务中的姿势预位调整（APAs）。
16 名有运动障碍报告的儿童（2 名女性，14 名男性；平均年龄 9 岁；SD=2 岁）和 16 名年龄匹配的正常发育儿童（6 名女性，10 名男性；平均年龄 9 岁；SD=2 岁）参与了本研究。任务要求儿童在不改变肘部角度的情况下，克服前臂施加或自愿的负荷。通过肌电图和运动学分析来评估 APA。
尽管 DCD 儿童可以补偿卸载的后果，但结果表明，DCD 儿童的 APA 效率低于正常发育儿童。只有在正常发育儿童中，才能发现屈肌抑制潜伏期与姿势稳定之间存在显著的正回归系数。
肌肉贡献的精细调节受损和稳定性能差，表明 DCD 儿童的预测建模能力较差。
