School of Human Sciences, The University of Western Australia, Perth, Western Australia, Australia.
School of Human Sciences, The University of Western Australia, Perth, Western Australia, Australia.
Res Dev Disabil. 2018 Dec;83:280-286. doi: 10.1016/j.ridd.2018.07.005. Epub 2018 Aug 7.
Developmental coordination disorder (DCD) is a motor learning disability that affects coordination resulting in an inability to perform movement skills at an age appropriate level. One area suspected to contribute to the movement difficulties experienced are deficits in visuomotor control.
This study investigated visual tracking behaviour during catching in children with DCD.
Twenty-four boys completed the study: 11 with DCD (9.43 years ±0.73) and 13 controls (9.16 years ± 0.68). Participants performed 10 central catching trials, with the best five used to evaluate tracking behaviour and motor responses.
Prior to ball release, the DCD group exhibited more fixations (p = 0.043) of lesser duration (p = 0.045). During flight, the DCD group took longer to initiate smooth pursuit (p = 0.003) however, once initiated, both groups were effectively able to maintain smooth pursuit. Despite initial delays, these had no impact on movement initiation time (p = 0.173), however, movement time was significantly slower in the DCD group (p = 0.031).
The results of this study demonstrate that catching performance in children with DCD likely reflect a combination of errors in attending to visual information and movement organisation.
发育性协调障碍（DCD）是一种运动学习障碍，影响协调，导致无法达到与其年龄相称的运动技能水平。被怀疑导致运动困难的一个领域是视动控制缺陷。
本研究调查了 DCD 儿童在接球过程中的视觉跟踪行为。
共有 24 名男孩完成了这项研究：11 名 DCD 儿童（9.43 岁±0.73 岁）和 13 名对照组儿童（9.16 岁±0.68 岁）。参与者完成了 10 次中心接球试验，其中最好的 5 次用于评估跟踪行为和运动反应。
在球释放之前，DCD 组表现出更多的注视（p=0.043）和更短的注视持续时间（p=0.045）。在飞行过程中，DCD 组启动平滑追踪的时间更长（p=0.003），然而，一旦启动，两组都能够有效地维持平滑追踪。尽管最初有延迟，但这对运动启动时间没有影响（p=0.173），然而，DCD 组的运动时间明显较慢（p=0.031）。
本研究的结果表明，DCD 儿童的接球表现可能反映了对视觉信息和运动组织的注意错误的综合影响。
