Abrupt, but not gradual visuomotor distortion facilitates adaptation in children with developmental coordination disorder
Abrupt, but not gradual visuomotor distortion facilitates adaptation in children with developmental coordination disorder
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DOI：
10.1016/j.humov.2006.06.003
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发表时间：
2006-10-01
影响因子：
2.1
通讯作者：
Clark, J. E.
中科院分区：
文献类型：
--
作者：
Kagerer, F. A.;Contreras-Vidal, J. L.;Clark, J. E.
先前的一项调查正常发育儿童和发育协调障碍（DCD）儿童视觉适应的实验表明，对突然引起的视觉干扰的适应不良。在目前的研究中，使用类似的中心向外绘图任务，但管理突然或逐渐扰动，以及两倍的适应试验，我们表明，通常发展中的儿童能够成功地更新现有的内部模型，以响应60度旋转的视觉反馈，独立的扰动条件。然而，患有DCD的儿童在暴露于突然的视觉扰动时比逐渐的视觉扰动时更有效地更新了他们的内部地图。这可能表明，DCD儿童的适应过程对小与大的视觉差异的反应不同。鉴于小脑在提供必要的错误信号以更新内部模型以响应逐渐的视觉失真中的已知作用，我们的研究结果增加了越来越多的证据表明DCD中小脑功能受损。(c)2006 Elsevier B.V.保留所有权利。
A previous experiment investigating visuomotor adaptation in typically developing children and children with Developmental Coordination Disorder (DCD) suggested poor adaptation to an abruptly induced visuomotor perturbation. In the current study, using a similar center-out drawing task, but administering either an abrupt or a gradual perturbation, and twice as many adaptation trials, we show that typically developing children are well able to successfully update an existing internal model in response to a 60 degrees rotation of the visual feedback, independent of the perturbation condition. Children with DCD, however, updated their internal map more effectively during exposure to an abrupt visuomotor perturbation than to a gradual one. This may suggest that the adaptation process in children with DCD responds differently to small vs. large steps of visuomotor discrepancies. Given the known role of the cerebellum in providing an error signal necessary for updating the internal model in response to a gradual visuomotor distortion, the results of our study add to the growing body of evidence implicating compromised cerebellar function in DCD. (c) 2006 Elsevier B.V. All rights reserved.