Does visual feedback during walking result in similar improvements in trunk control for young and older healthy adults?
Does visual feedback during walking result in similar improvements in trunk control for young and older healthy adults?
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DOI：
10.1186/1743-0003-10-110
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发表时间：
2013-11-26
影响因子：
5.1
通讯作者：
Jeka, John
中科院分区：
文献类型：
--
作者：
Anson, Eric;Rosenberg, Russell;Jeka, John
背景资料：目前大多数应用视觉反馈来改善姿势控制的方法都局限于固定的支撑基础，并且在改善姿势控制和转移到功能任务方面产生了混合的结果。目前，在行走时提供关于躯干运动的视觉反馈的选项很少。我们已经开发了一个低成本的平台，以提供视觉反馈的躯干运动在步行过程中。在这里，我们调查是否增强视觉位置反馈将减少躯干运动的变异性在年轻和老年健康adults.Methods：参加的受试者是10名年轻人和10名老年人。受试者在视觉位置反馈和无反馈的条件下在跑步机上行走。视觉反馈包括受试者在跑步机行走过程中躯干的前后（AP）和内外（ML）位置。傅立叶变换的AP和ML躯干运动学被用来计算功率谱密度被集成为频率箱“下面的步态周期”和“步态周期和以上”为analysis purpose.Results：视觉反馈减少运动功率在非常低的频率腰椎和颈部的平移，但不是躯干角度在两个年龄组。在非常低的身体运动频率下，老年人在有反馈的情况下的运动变异性水平与没有反馈的年轻人相当。较低的变异性是特定的平移（而不是角度）躯干运动。视觉反馈并没有影响任何测量的下肢步态模式的特点，任何一组，这表明变化没有调用不同的步态pattery.Conclusions：减少平移的变化，而走在跑步机上反映了更精确的控制，保持在跑步机上的中心位置。这种反馈可以提供一种重要的技术来增强康复，以最大限度地减少行走时的身体平移。在行走过程中平衡不佳的个人可以从这种类型的训练中受益，以提高地面运动过程中的路径一致性。
Background: Most current applications of visual feedback to improve postural control are limited to a fixed base of support and produce mixed results regarding improved postural control and transfer to functional tasks. Currently there are few options available to provide visual feedback regarding trunk motion while walking. We have developed a low cost platform to provide visual feedback of trunk motion during walking. Here we investigated whether augmented visual position feedback would reduce trunk movement variability in both young and older healthy adults.Methods: The subjects who participated were 10 young and 10 older adults. Subjects walked on a treadmill under conditions of visual position feedback and no feedback. The visual feedback consisted of anterior-posterior (AP) and medial-lateral (ML) position of the subject's trunk during treadmill walking. Fourier transforms of the AP and ML trunk kinematics were used to calculate power spectral densities which were integrated as frequency bins "below the gait cycle" and "gait cycle and above" for analysis purposes.Results: Visual feedback reduced movement power at very low frequencies for lumbar and neck translation but not trunk angle in both age groups. At very low frequencies of body movement, older adults had equivalent levels of movement variability with feedback as young adults without feedback. Lower variability was specific to translational (not angular) trunk movement. Visual feedback did not affect any of the measured lower extremity gait pattern characteristics of either group, suggesting that changes were not invoked by a different gait pattern.Conclusions: Reduced translational variability while walking on the treadmill reflects more precise control maintaining a central position on the treadmill. Such feedback may provide an important technique to augment rehabilitation to minimize body translation while walking. Individuals with poor balance during walking may benefit from this type of training to enhance path consistency during over-ground locomotion.