Online Control of Prehension Predicts Performance on a Standardized Motor Assessment Test in 8- to 12-Year-Old Children.
Online Control of Prehension Predicts Performance on a Standardized Motor Assessment Test in 8- to 12-Year-Old Children.
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DOI：
10.3389/fpsyg.2017.00374
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发表时间：
2017
影响因子：
3.8
通讯作者：
Holmes NP
中科院分区：
文献类型：
--
作者：
Blanchard CC;McGlashan HL;French B;Sperring RJ;Petrocochino B;Holmes NP
以目标为导向的手部动作是由感官信息引导的，并可能在运动过程中进行在线调整。如果移动的目标意外改变位置，成年人可以在短短100毫秒内启动轨迹校正。这种快速的视觉在线控制在患有发育性协调障碍(DCD)的儿童中受到损害，可能在其他神经发育状况下也是如此。我们研究了儿童在“中心向外”两步到达和抓握任务中对手运动的视觉控制，并研究了这种视觉运动控制的参数与通常用于典型和非典型发育儿童的标准化运动测试中的表现是如何变化的。两组8-12岁的儿童被要求在垂直方向的黑板上拿到并抓住一个发光的中心球。在一定比例的试验中，在运动开始时，照明不可预测地切换到其他四个中外球中的一个(左、右、上或下)。当目标移动时，除一名儿童外，所有儿童都能够在到达初始目标之前纠正他们的动作，至少在一些试验中是这样，但启动这些纠正的潜伏期比成人文献中通常报道的更长，从211到581ms不等。这些后来的纠正可能是由于儿童运动技能发展较差，或者是因为在四个方向上切换动作的认知和生物力学复杂性增加。在第一组(n=187)中，触手和抓握参数显著预测MABC-2上的标准化运动分数，对瞄准和捕捉部分的预测作用最强。在第二组(n=85)，这些相同的参数对DCDQ‘07家长问卷的得分没有显著预测作用。我们的伸手和握力任务提供了一种灵敏和连续的运动技能测量方法，可以预测用于筛查DCD的标准化运动任务的分数。
Goal-directed hand movements are guided by sensory information and may be adjusted ‘online,’ during the movement. If the target of a movement unexpectedly changes position, trajectory corrections can be initiated in as little as 100 ms in adults. This rapid visual online control is impaired in children with developmental coordination disorder (DCD), and potentially in other neurodevelopmental conditions. We investigated the visual control of hand movements in children in a ‘center-out’ double-step reaching and grasping task, and examined how parameters of this visuomotor control co-vary with performance on standardized motor tests often used with typically and atypically developing children. Two groups of children aged 8–12 years were asked to reach and grasp an illuminated central ball on a vertically oriented board. On a proportion of trials, and at movement onset, the illumination switched unpredictably to one of four other balls in a center-out configuration (left, right, up, or down). When the target moved, all but one of the children were able to correct their movements before reaching the initial target, at least on some trials, but the latencies to initiate these corrections were longer than those typically reported in the adult literature, ranging from 211 to 581 ms. These later corrections may be due to less developed motor skills in children, or to the increased cognitive and biomechanical complexity of switching movements in four directions. In the first group (n = 187), reaching and grasping parameters significantly predicted standardized movement scores on the MABC-2, most strongly for the aiming and catching component. In the second group (n = 85), these same parameters did not significantly predict scores on the DCDQ′07 parent questionnaire. Our reaching and grasping task provides a sensitive and continuous measure of movement skill that predicts scores on standardized movement tasks used to screen for DCD.