Raynor A J
School of Physical Education, National Institute of Education, Nanyang Technological University, 469 Bukit Timah Rd., Singapore 259756.
Motor Control. 1998 Apr;2(2):114-24. doi: 10.1123/mcj.2.2.114.
The patellar tendon reflex (PTR) and simple visual reaction time (RT) were fractionated and compared in 40 subjects with developmental coordination disorder (DCD) and normal coordination (NC) in two age groups. Four equal groups of subjects, 6 years DCD (6DCD), 6 years NC (6NC), 9 years DCD (9DCD), and 9 years NC (9NC) were compared using ANOVA for the main effects of coordination and age. PTR and its components of reflex latency and motor time were not significantly affected by the level of coordination; however, a significant coordination by age interaction (p < .05) revealed an increased motor time in the 6DCD group. RT, premotor time, and motor time were all significantly (p < .05) increased in children with DCD; the increased RT and premotor time support earlier findings, whereas the increased motor time has not previously been found. These findings suggest that the processing of reflexive and volitional responses by children with DCD differs from that of their NC peers.
在两个年龄组中，对40名患有发育性协调障碍（DCD）和协调正常（NC）的受试者的髌腱反射（PTR）和简单视觉反应时间（RT）进行了区分和比较。使用方差分析比较了四组同等数量的受试者，即6岁DCD组（6DCD）、6岁NC组（6NC）、9岁DCD组（9DCD）和9岁NC组（9NC），以研究协调能力和年龄的主要影响。PTR及其反射潜伏期和运动时间成分不受协调水平的显著影响；然而，显著的协调能力与年龄交互作用（p < 0.05）显示，6DCD组的运动时间增加。DCD儿童的RT、运动前时间和运动时间均显著增加（p < 0.05）；RT和运动前时间的增加支持了早期研究结果，而运动时间的增加此前尚未发现。这些发现表明，DCD儿童的反射性和意志性反应处理方式与他们的NC同龄人不同。
