Anticipatory responses to perturbation of co-ordination in one-handed catching
Anticipatory responses to perturbation of co-ordination in one-handed catching
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DOI：
10.1016/s0001-6918(01)00052-x
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发表时间：
2002-01-01
影响因子：
1.8
通讯作者：
Savelsbergh, GJP
中科院分区：
文献类型：
--
作者：
Button, C;Davids, K;Savelsbergh, GJP
在动态拦截行动的协调中，对扰动的预期响应很少被研究。在这项研究中，运动学的球捕捉在熟练的捕手时，捕捉臂的机械扰动是预期和意外的。在预期扰动的试验期间，参与者比随机扰动试验（223 +/-34 ms）更早地开始运动（207 +/- 32 ms），此外，与基线试验相比，当预期扰动时，几个人也倾向于更快地移动他们的手。个别分析显示，三出八名参与者表现出变化的把握阶段的相对时间，以适应特定的操作任务的限制。预期反应不仅表现在动作开始时的变化中，还表现在接球的伸手和抓握阶段协调的适应性变化中。当捕捉者无法预测扰动时，运动策略建议使用基于连续跟踪的控制模式，而不是基于预测的控制模式。(C)2002年爱思唯尔科学BN。All rights reserved.
Anticipatory responses to perturbation have rarely been studied in the co-ordination of dynamic interceptive actions. In this study, the kinematics of ball catching were examined in skilled catchers when mechanical perturbation of the catching arm was expected and unexpected. During trials where the perturbation was anticipated, participants initiated movements earlier (207 +/- 32 ms) than in randomly perturbed trials (223 +/- 34 ms), Furthermore, several individuals also tended to move their hand faster when perturbations were expected compared to baseline trials. Individual analyses revealed that three out of eight participants exhibited changes in the relative timing of the grasp phase to adapt to the specific manipulation of task constraints. Anticipatory responses were revealed in changes not only at movement initiation but also in the resulting adaptations to the co-ordination of reach and grasp phases of ball catching. When the catchers could not anticipate perturbations, movement strategies suggested the use of a continuous tracking-based mode of control rather than a prediction-based mode of control. (C) 2002 Elsevier Science BN. All rights reserved.