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題名:Hand Orthosis Controlled Using Brain-computer Interface     (16點)
著者:Chih-Wei ChenChou-Ching K. LinMing-Shaung Ju
出版地區:台灣
出版城市:台南市
學科:醫學綜合
關鍵字:Brain-computer interface BCI ; Orthosis hand ; Orthosis ; Biofeedback training
刊名:Journal of Medical and Biological Engineering
卷期:29卷5期(2009.10)
頁碼:234-241
語言:英語
摘要: 英文摘要PDF

The purpose of this study was to construct a brain-computer-interface (BCI) based orthotic hand, including a prototype BCI system and a custom-made orthotic hand. The BCI can generate tri-state commands by processing a subject's mu wave while imaginary movement is performed, and the orthotic hand can be controlled to grasp, open and hold an object still. A BCI-based cursor control interface (visual feedback) with a simple classifier is designed to pre-train a naïve subject for performing imaginary movements. Then the classifier is adjusted to adapt to the subjects' EEG features for controlling the orthotic hand. The orthotic hand can be controlled under position and force modes, which are switched automatically by a logic controller depending on the commands and the current status of the orthotic hand. Three performance indices, namely, reaction time, information transfer rate and mean-squared error of force, were defined for evaluating the performance of the BCI-based orthosis under position and force control modes. The averaged success rates of three subjects were improved from 42% to 86% in 120 trials after pre-training. With the adaptive classifier, the averaged reaction time was reduced from 5 to 2 seconds under the position control mode, and the averaged information transfer rate was increased from 0.2 to 1.3 bit/trial. The mean-squared error of force was about 0.326 N while grasping an object under force control mode.


    

本卷期目次
Journal of Medical and Biological Engineering 29卷5期 (2009.10)
Review: Applications of Near Infrared Spectroscopy and Imaging for Motor Rehabilitation in Stroke Patients/ Pei-Yi LinSang-I LinTrevor PenneyJia-Jin Jason Chen
Compressible Image Registration for Thoracic Computed Tomography Images/ Edward CastilloRichard CastilloYin ZhangThomas Guerrero
Hand Orthosis Controlled Using Brain-computer Interface/ Chih-Wei ChenChou-Ching K. LinMing-Shaung Ju
Multi-class Classification of Ultrasonic Supraspinatus Images Based on Radial Basis Function Neural Network/ Ming-Huwi HorngShu-Min Chen
Computer Simulation of 3-D Temperature and Power Distributions in Tissue with a Countercurrent Blood Vessels Network during Hyperthermia/ Huang-Wen HuangTzu-Ching ShihChihng-Tsung LiauhTzyy-Leng Horng
Consistent Rendering for Comparison of Multiple Radiographs in an Intensive Care Unit/ Sheng ChenPei Wang
Inverse Diamond Search Algorithm for 3D Medical Image Set Compression/ Wen-Jan ChenHui-Min Chen
A Variant-based Biometric Authentication Scheme Based on Rotor Machine for Home Security/ Ping WangChih-Chiang Ku
 
   
 
   

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