文献类型：期刊文献

中文题名：基于听觉提示汉字书写的运动想象范式

英文题名：Chinese Characters Writing Task Based Motor Imagery Paradigm Using Auditory Cues

作者：邱朝阳[1];金晶[1];王行愚[1]

机构：[1]华东理工大学化工过程先进控制和优化技术教育部重点实验室,上海200237

年份：2018

卷号：44

期号：6

起止页码：876

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

基金：国家自然科学基金(91420302;61573142);高等学校学科创新引智计划(111计划;B17017);中央高校基本科研业务费专项基金(WH1516018);上海市晨光计划(14CG31)

语种：中文

中文关键词：脑-机接口;运动想象;实验范式;听觉提示

外文关键词：brain-computer interface;motor imagery;experiment paradigm;auditory cues

摘要：基于运动想象的脑-机接口系统为残疾人提供了一种新的控制外部设备的途径。本文针对传统范式中只提示想象对象(左手或右手)不提示想象内容的不足,设计了一种新的基于汉字书写的运动想象范式。该范式通过左右声道提示被试进行想象汉字书写的任务。将新范式与传统范式进行了对比实验,8名健康被试参与了本项研究。实验结果表明,基于听觉提示的运动想象书写范式获得了更高的准确率(t检验概率值p<0.05),并且有效降低了实验任务的难度。
Motor imagery based brain-computer interface(BCI)systems can provide an effective communication channel for the physically impaired to control external devices.The performance of MI based BCI mainly depends on the individual’s ability to self-modulate EEG signals and proper training can help individual learn to modulate brain activity proficiently.Because the MI based BCI system typically involves abstract motor tasks that is time-consuming for training subjects,it is important for improving the performance of BCI systems to design a reasonable interactive motor imagery paradigm.Aiming at the deficiency of the traditional paradigm only prompting imaginary object(left or right hand),not the specific content of imagination,this paper proposes a novel motor imagination paradigm based on Chinese character writing,which can prompt individual to imagine writing Chinese characters by left and right channels.Comparison experiments with eight healthy individuals(5male,3female,at the age of23-27,mean24.5)have been made,in which every individual’s task is to imagine hand movements following the sequence of writing strokes in the Chinese character and individual’s EEG signals are collected and analyzed.Experimental results show that the proposed paradigm can attain significantly better classification accuracies(p<0.05)than the traditional paradigm.Writing Chinese characters is more complex than squeezing one of the hands and other simple tasks,due to involving in the movement sequences.Imagining writing characters could greatly increase the activation of motor areas compared with imagining a simple task,so it can ensure more reliable signals for classification.According to the questionnaire replies,most individuals think that the proposed paradigm can reduce the difficulty of the motor imagery task effectively.