伴随规则节律的运动想象方案设计

Program Design of Motor Imagery with Regular Rhythm

目的提出一种伴随规则节律的运动想象范式,以解决脑机接口运动想象康复机器人分类准确率偏低的问题。方法未经运动想象训练的健康被试10例,通过动作图片提示进行运动想象引导,图片内容为伴随规则节律的运动动作。利用共同空间模式特征提取算法和Fisher分类器进行分类,与传统范式和伴随无规则节律的运动想象范式进行对比。结果伴规则节律的运动想象范式出现更加明显的去同步现象,分类准确率明显提高。结论伴随规则节律的运动想象方案为基于脑机接口的主动康复训练研究提供新思路。

Objective To propose a motor imagery paradigm with regular rhythm to improve the accuracy of classification in braincomputer interface based on motor imagery.Methods Ten untrained healthy subjects were asked to image the movement guided by the picture accompanied with regular rhythm.The common spatial pattern feature extraction algorithm and Fisher classifier were used for classification,and compared with the traditional paradigm and the motor imagery paradigm accompanying with irregular rhythm.Results More desynchronization was found as motor imagery with regular rhythm,while the classification accuracy improved.Conclusion Motor imagery with regular rhythm gives a new idea for active rehabilitation training based on brain-computer interface.