Faculty of Kinesiology and Health Studies, University of Regina, Regina, SK, Canada.
Hum Mov Sci. 2012 Jun;31(3):707-20. doi: 10.1016/j.humov.2011.08.004. Epub 2011 Oct 7.
Current evidence suggests that movement quality is impacted by postural adjustments made in advance of planned movement. The trunk inevitably plays a key role in these adjustments, by creating a stable foundation for limb movement. The purpose of this study was to examine anticipatory trunk muscle activity during functional tasks in children with and without developmental coordination disorder (DCD). Eleven children with DCD (age 7 to 14 years) and 11 age-matched, typically-developing children performed three tasks: kicking a ball, climbing stairs, and single leg balance. Surface electromyography (EMG) was used to examine the neuromuscular activity of bilateral transversus abdominis/internal oblique, external oblique and L3/4 erector spinae, as well as the right tibialis anterior and rectus femoris muscles. Onset latencies for each muscle were calculated relative to the onset of rectus femoris activity. In comparison to the children with DCD, the typically-developing children demonstrated earlier onsets for right tibialis anterior, bilateral external oblique, and right transversus abdominis/internal oblique muscles. These results suggest that anticipatory postural adjustments may be associated with movement problems in children with DCD, and that timing of both proximal and distal muscles should be considered when designing intervention programs for children with DCD.
目前的证据表明，运动质量受到计划运动前进行的姿势调整的影响。躯干不可避免地在这些调整中起着关键作用，为肢体运动创造了一个稳定的基础。本研究旨在研究发育性协调障碍（DCD）儿童和正常发育儿童在进行功能性任务时的躯干肌肉的预位活动。11 名患有 DCD 的儿童（7 至 14 岁）和 11 名年龄匹配的正常发育儿童完成了三项任务：踢球、爬楼梯和单腿平衡。表面肌电图（EMG）用于检查双侧横腹肌/内斜肌、外斜肌和 L3/4 竖脊肌以及右胫骨前肌和股直肌的神经肌肉活动。每个肌肉的起始潜伏期相对于股直肌活动的起始进行计算。与 DCD 儿童相比，正常发育的儿童右胫骨前肌、双侧外斜肌和右横腹肌/内斜肌的起始时间更早。这些结果表明，预期性姿势调整可能与 DCD 儿童的运动问题有关，在为 DCD 儿童设计干预计划时，应考虑近端和远端肌肉的时间安排。
