目的探讨上肢执行前伸动作时座椅面倾斜方向对痉挛型脑瘫儿童上肢前伸功能和姿势调整的影响。方法选择2010 年~2014 年本院痉挛型双瘫儿童15 例作为患者组，同期正常发育儿童15 例作为对照组。采集两组分别在座椅面前倾15°、水平0°及后倾15°等三种方式下上肢前伸的反应时间和动作时间，以及前伸动作过程中躯干腹部肌群和背部肌群的肌肉收缩次数，并计算肌肉收缩率。结果两组座椅面前倾15°，上肢前伸反应时间和动作时间显著短于水平0°和后倾15°(P<0.001)，腹部肌肉和背部肌肉收缩率显著低于水平0°和后倾15°(P<0.001)。两组间反应时间无显著性差异(P>0.05)，患者组动作时间显著长于对照组(P<0.001)。患者组收缩率均高于对照组。结论座椅面前倾15°可改善痉挛型双瘫儿童的姿势控制和上肢前伸功能。

Objective To explore the effects of tilted seat surface on front protraction of upper limb and postural adjustment while sitting in children with spastic cerebral palsy. Methods From 2010 to 2014, 15 children with spastic cerebral palsy (patients group) and 15 healthy children (control group) were recruited. They were asked to reach forward sitting on the tilted seat surface with different degrees (-15°, 0°, 15° ) to test the reaction time and movement time. The contraction times of rectus abdominis and back extensors were recorded and analyzed. Results The reaction time and movement time were shorter, and the contraction rates of rectus abdominis and back extensors were lower in the degree with -15° than with 0° and 15° (P<0.001). There was no difference in reaction time between two groups (P>0.05), and the movement time was longer in the patients group than in the control group (P<0.001). The contraction rates were higher in the patients group than in the control group. Conclusion Anterior tilted seat surface may improve the front protraction function of upper limb and the postural adjustment in children with cerebral palsy.