Zaino Christopher A, McCoy Sarah Westcott
Care for Children, Beijing, China.
Gait Posture. 2008 Jan;27(1):128-37. doi: 10.1016/j.gaitpost.2007.03.003. Epub 2007 Apr 24.
The purposes of this study of children with cerebral palsy (CP) and with typical development (TD) were to determine: (1) within session test-retest reliability of electromyography (EMG) of postural muscles [using motor coordination patterns (cMCP)] and center of pressure (COP) measures, (2) relationships between cMCP and COP measures, and (3) differences between children with CP and with TD. Data were collected twice during a standing reach task in 20 pairs of age and gender matched children, 8-14-years-old. Test-retest reliability was poor for cMCPs (kappa=0.16-0.21), but good for kinetic measures (ICC=0.69-0.87). Both groups demonstrated strong reliance on anterior-posterior neuromuscular control with greater variability in the children with CP. The group with TD showed greater control in anterior-posterior COP movements than did the group with CP. Anterior-posterior COP measures were associated with more effective cMCPs in both groups. These data support the concept of the center of gravity as a potential control parameter working with a flexible neuromuscular system for postural control.
本研究针对脑瘫（CP）患儿和发育正常（TD）儿童的目的在于确定：（1）姿势肌肌电图（EMG）[采用运动协调模式（cMCP）]和压力中心（COP）测量值在测试过程中的重测信度；（2）cMCP与COP测量值之间的关系；以及（3）CP患儿与TD儿童之间的差异。在一项站立伸展任务中，对20对年龄和性别匹配的8至14岁儿童的数据进行了两次收集。cMCP的重测信度较差（kappa = 0.16 - 0.21），但动力学测量的重测信度良好（ICC = 0.69 - 0.87）。两组儿童均表现出对前后神经肌肉控制的强烈依赖，且CP患儿的变异性更大。TD组在前后COP运动方面比CP组表现出更好的控制。在两组中，前后COP测量值均与更有效的cMCP相关。这些数据支持了重心作为一个潜在控制参数与灵活的神经肌肉系统共同作用以进行姿势控制的概念。
