Sensory reweighting as a method of balance training for labyrinthine loss.
Sensory reweighting as a method of balance training for labyrinthine loss.
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DOI：
10.1097/npt.0b013e31818dee39
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发表时间：
2008-12
期刊：
影响因子：
--
通讯作者：
Keshner EA
中科院分区：
文献类型：
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作者：
Haran FJ;Keshner EA
不稳定是双侧肾上腺皮质激素缺乏个体发生福尔斯的重要危险因素。本病例报告的目的是描述一种干预，我们发现，使用基于感觉重新加权假设的训练范例，可以改善双侧甲状腺功能障碍患者的平衡。参与者是一名女性，双侧肾上腺皮质激素缺乏发作后10年。参与者被指示在站在动态平台上时专注于她的臀部和膝盖的运动，该动态平台是静止的或与她的质心（COM）的偏移相匹配，但在相反的方向上并且具有逐渐增加的幅度。在训练前和训练后的两个阶段，她都接受了在感官冲突条件下保持平衡的能力测试。减少前后和mediolateral运动的COM之间的pretest和posttests与一个固定的和移动的平台时，在黑暗中和感官冲突的条件下观察。利用近似熵的方法，我们发现在与COM运动相匹配的平台上，从前测到后测，压力中心（center of pressure，COP）反应的复杂性在前后和内外两个方向上都增加了。结果表明，在动态平台上的训练减少了相互冲突的感觉信号的不稳定作用。此外，在COP中观察到COM运动减少和复杂性增加之间的关系，COP代表了一个更自组织的系统。这一发现表明，改进的稳定性可能与COP轨迹的复杂性增加有关。
Instability is a significant risk factor for falls in individuals with a bilateral labyrinthine deficit. The purpose of this case report is to describe an intervention that we found to improve balance in a patient with bilateral labyrinthine deficit using a training paradigm based on the sensory reweighting hypothesis. The participant was a female and 10 years post-onset of bilateral labyrinthine deficit. The participant was instructed to focus on the motion of her hips and knees while standing on a dynamic platform that was either stationary or matched to the excursion of her center of mass (COM) but in the opposite direction and with gradually increasing amplitude. She was tested for her ability to maintain her balance under conditions of sensory conflict both before the training and on two periods after training. Decreases in anteroposterior and mediolateral motion of the COM were observed between the pretest and both posttests with a stationary and a moving platform when in the dark and under conditions of sensory conflict. Using the method of approximate entropy, we found that the complexity of the center of pressure (COP) response increased in both the anteroposterior and medolateral directions from the pretest to both posttests when on the platform matched to the COM motion. Results indicated that training on a dynamic platform diminished the destabilizing effect of conflicting sensory signals. Additionally, a relationship was observed between decreased COM motion and increased complexity in COP, which represents a more self-organized system. This finding suggests that improved stability may be associated with an increased complexity in the COP trajectory.