Anticipatory postural adjustments in a bimanual, whole-body lifting task seem not only aimed at minimising anterior-posterior centre of mass displacements
Anticipatory postural adjustments in a bimanual, whole-body lifting task seem not only aimed at minimising anterior-posterior centre of mass displacements
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DOI：
10.1016/s0966-6362(01)00098-4
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发表时间：
2001-07-01
期刊：
影响因子：
2.4
通讯作者：
Hirschfeld, H
中科院分区：
文献类型：
--
作者：
Commissaris, DACM;Toussaint, HM;Hirschfeld, H
预期姿势调整（APAs）进行了研究，在双手全身举重任务，使用机械分析的向下运动阶段之前加载与卸载升降机。后向地面反作用力中的APAs导致了-400 ms的扰动前向箱反作用力，从而引起了后向质心动量。阿帕发作和幅度都作为要提升的负载的函数进行缩放。我们的结论是，在这个提升任务中，APA服务于产生一个适当的延伸的地面反作用力的时刻后，箱回升，而不是传统定义的目标，最大限度地减少前后中心的质量位移。(C)2001 Elsevier Science B. V.保留所有权利。
Anticipatory postural adjustments (APAs) were studied in a bimanual whole-body lifting task, using a mechanical analysis of the downward movement phase preceding loaded versus unloaded lifts. APAs in the backward ground reaction force were found to lead the perturbing forward box reaction with - 400 ms, thus inducing a backward cent re of mass momentum. Both the APA onset and magnitude were scaled as a function of the load to be lifted. We conclude that, in this lifting task, the APAs served the generation of an appropriate extending moment of the ground reaction force after box pick-up, rather than the traditionally defined goal of minimising anterior-posterior centre of mass displacements. (C) 2001 Elsevier Science B.V. All rights reserved.