学术
小波相干分析及其在听觉与震动刺激事件相关诱发脑电处理中的应用
吴捷[1] 张宁[1] 杨卓[2] 张涛[1]
[1]南开大学生命科学学院,生物活性材料教育部重点实验室,天津300071 [2]南开大学医学院,天津300071
摘 要:
尝试将小波相干方法应用于事件相关电位实验的脑电信号分析中。实验分为三组：听觉任务、震动任务1和震动任务2。对12个受试者的实验数据进行40Hz左右的小波相干分析，计算了前额脑区与其他各脑区之间的相干性，发现震动任务的小波相干值大于听觉任务并有显著差异，且在不同的任务中，各脑区的小波相干值有其明显不同的分布特征，且随时间呈有规律的变化。分析体现了小波相干在短时脑电信号处理上的优势。[著者文摘]
文章出处:
《生物物理学报》-2007年23卷6期 -482-487页
栏目信息:
分 类 号:
WAVELET COHERENCE AND ITS APPLICATION IN ANALYZING AUDITORY AND MOTOR TASK EVENT-RELATED POTENTIALS
WU Jie, ZHANG Ning, YANG Zhuo, ZHANG Tao （1. Key Lab of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Tianjin 300071, China; 2. College of Medicine Science, Nankai University, Tianjin 300071, China）
Abstract:
Wavelet coherence method is applied in analyzing single trial of ERP （event-related potential）. There are three groups of experiments： auditory single task, motor single task 1 and motor single task 2. Data from 12 participants is analyzed around 40 Hz by wavelet coherence method and the coherence values between prefrontal area and other areas in the brain are calculated. It is found that the coherence values in motor tasks are larger than those in auditory task and there are significantly differences. Furthermore, in different tasks, the distributions of the coherence values are obviously different, and the values are changing in particularly ways according the varying of the time. This analysis indicates that wavelet coherence method has its advantages in investigating short time EEG signals.[著者文摘]
Key words:
Wavelet coherence; Time-frequency analysis; EEG; ERP （Event-related potential）
基金资助:
国家自然科学基金项目（30470453,30640037）和天津市基础应用研究面上项目（06yfjwjc09400）
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