Development of multisensory reweighting for posture control in children
Development of multisensory reweighting for posture control in children
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DOI：
10.1007/s00221-007-1057-2
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发表时间：
2007-12-01
影响因子：
2
通讯作者：
Clark, Jane E.
中科院分区：
文献类型：
--
作者：
Bair, Woei-Nan;Kiemel, Tim;Clark, Jane E.
对多感觉输入的重新加权自适应地有助于稳定和灵活的直立姿势控制。然而，很少有研究研究儿童在多早的时候发展多感官重能力，或者这种能力是如何在童年期间发展的。这项研究的目的是描述4-10岁儿童直立姿势控制的多感觉重新加权的发展图景。在五种独立改变刺激幅度的条件下，儿童分别被呈现出同时以0.28和0.2赫兹的小幅度躯体感觉和视觉环境运动。主要的衡量标准是身体相对于每个刺激的摆动幅度：触觉增益和视力增益。我们发现，从4岁起，孩子们就可以重新调整体重，以适应多感官输入。具体地说，通道内权重重在4岁以下的儿童中表现出来；然而，通道间权重重仅在年龄较大的儿童中观察到。加权量随着年龄的增长而增加，表明有更好的适应能力发展。我们的结果严格地证明了在儿童的姿势控制中，同时对两个感觉输入进行重加权的发展。本研究结果进一步证明，多感官加权的发展有助于更稳定和灵活地控制直立姿势，这最终为运动和伸展等功能性行为奠定了基础。
Reweighting to multisensory inputs adaptively contributes to stable and flexible upright stance control. However, few studies have examined how early a child develops multisensory reweighting ability, or how this ability develops through childhood. The purpose of the study was to characterize a developmental landscape of multisensory reweighting for upright postural control in children 4-10 years of age. Children were presented with simultaneous small-amplitude somatosensory and visual environmental movement at 0.28 and 0.2 Hz, respectively, within five conditions that independently varied the amplitude of the stimuli. The primary measure was body sway amplitude relative to each stimulus: touch gain and vision gain. We found that children can reweight to multisensory inputs from 4 years on. Specifically, intra-modal reweighting was exhibited by children as young as 4 years of age; however, inter-modal reweighting was only observed in the older children. The amount of reweighting increased with age indicating development of a better adaptive ability. Our results rigorously demonstrate the development of simultaneous reweighting to two sensory inputs for postural control in children. The present results provide further evidence that the development of multisensory reweighting contributes to more stable and flexible control of upright stance, which ultimately serves as the foundation for functional behaviors such as locomotion and reaching.