A multisensory integration model of human stance control
A multisensory integration model of human stance control
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DOI：
10.1007/s004220050527
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发表时间：
1999-05-01
影响因子：
1.9
通讯作者：
Grootenboer, H
中科院分区：
文献类型：
--
作者：
van der Kooij, H;Jacobs, R;Grootenboer, H
基于最优估计理论，提出了一种研究和量化所有可用感官信息对人体站立的贡献的模型。在该模型中，延迟的感觉信息以这样一种方式被整合，从而获得对身体方向的最佳估计。模型方法与目前关于人体平衡控制目标的理论是一致的。该模型不是基于纯粹的倒立摆体动力学，而是基于一个站在可移动支撑基座上的人的三连杆分段模型。此外，该模型是非线性的，明确地解决了多感觉整合和神经时间延迟的问题。控制器中包含一个预测元件，以补偿时间延迟，这是保持直立身体方向所必需的。感觉扰动对全身摆动的模型结果与实验结果非常接近。尽管有内部和外部的扰动，控制器能够稳定一个固有不稳定的站立人的模型，其神经时间延迟为100毫秒。结果表明，该模型能够对人体姿态控制中的多感觉整合进行研究和量化。我们的目标是将该模型应用于(1)假肢和矫形器的设计和开发以及(2)神经平衡障碍的诊断。
A model is presented to study and quantify the contribution of all available sensory information to human standing based on optimal estimation theory. In the model, delayed sensory information is integrated in such a way that a best estimate of body orientation is obtained. The model approach agrees with the present theory of the goal of human balance control. The model is not based on purely inverted pendulum body dynamics, but rather on a three-link segment model of a standing human on a movable support base. In addition, the model is non-linear and explicitly addresses the problem of multisensory integration and neural time delays. A predictive element is included in the controller to compensate for time delays, necessary to maintain erect body orientation. Model results of sensory perturbations on total body sway closely resemble experimental results. Despite internal and external perturbations, the controller is able to stabilise the model of an inherently unstable standing human with neural time delays of 100 ms. It is concluded, that the model is capable of studying and quantifying multisensory integration in human stance control. We aim to apply the model in (1) the design and development of prostheses and orthoses and (2) the diagnosis of neurological balance disorders.