站立时姿势控制中视觉反馈的特征。

Characteristics of visual feedback in postural control during standing.

作者信息

Fukuoka Y, Tanaka K, Ishida A, Minamitani H

机构信息

Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Japan.

出版信息

IEEE Trans Rehabil Eng. 1999 Dec;7(4):427-34. doi: 10.1109/86.808946.

DOI:10.1109/86.808946

PMID:10609630

Abstract

In the present study, the visual feedback system in postural control was investigated. To suppress the vestibular and proprioceptive feedback paths, a subject stood on a force-measuring plate with a fixed back support. Because the subject's body was immovable under these conditions, the subject controlled a computer model which simulated body dynamics. Information on the sway angle of the model was fed visually. Under this condition, frequency response functions for the ankle moment in response to the sway angle were calculated. The experimental results suggest that the visual feedback system contains a large time delay and, consequently, the visual system does not by itself allow a subject to maintain an upright posture. Index Terms- Feedback control, frequency characteristics, identification, posture, visual sensory feedback.

摘要

在本研究中，对姿势控制中的视觉反馈系统进行了研究。为了抑制前庭和本体感觉反馈路径，受试者站在带有固定背部支撑的测力板上。由于受试者的身体在这些条件下是不可移动的，因此受试者控制一个模拟身体动力学的计算机模型。模型摆动角度的信息以视觉方式输入。在这种条件下，计算了响应摆动角度的踝关节力矩的频率响应函数。实验结果表明，视觉反馈系统存在较大的时间延迟，因此，视觉系统本身并不能使受试者保持直立姿势。关键词——反馈控制、频率特性、识别、姿势、视觉感觉反馈。