Design and Clinical Assessment of Feedback Controlled FES System for Hemiplegia in Balance Training

• Main Authors: Chao-Jen Chen, 陳昭仁
• Other Authors: Walter. H. Chang
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/18028126955275543413

碩士 === 中原大學 === 醫學工程研究所 === 93 === 　　In this study , a micro accelerometer is included in this functional balance training control system.This system can capture both the trajectory of 2-dimensional center of pressure(COP) and center of gravity(COG) in real time and 3-dimensional trajectory with time variation for hemiplegia on the force plate .These all can be represented in the forms of graphical demonstrations.It is proved that the direction between COP and COG trajectory are similar . 　　In this study ,some results have been carried out in clinical test of normal persons and hemiplegia .The control system’s reproduction is fine across twice test from ten normal .In addition, we separated Visual Feedback group(Gr V) from Visual Feedback+FES group(Gr V+FES) to hemiplegia in the clinical experiment, and aimed at hemiplegia’s (1)weight-transfer capabilities (2)COP maximum displacement and (3)affected side loading to make objective assessment for improvement condition after training. We find that Gr V and Gr V+FES have been improved after two weeks training. At the increase rate comparison, the improvement of balance control is more prominent in Gr V+FES than Gr V. Otherwise, hemiplegia’s balance control was improved stimulated by FES from questionary. 　　It was found that the back knee and pusher syndrome are important indexes in balance training . To overcome the difficulties, we suggested to increase the numbers of the corresponding feedback signals to gather more physical status of the patients. And using the controller developed by our system, we can help the hemiplegia to find other suitable balance modes.