摘要
为探究视听感知愉快、愤怒、悲伤、惊讶、厌恶、恐惧6种情绪时,不同脑区之间的脑电同步现象,本文设计了视听情绪诱发实验范式,利用Neuroscan 40导联脑电放大器采集脑电信号,采用AR模型以及相干平均去除基线漂移和自发脑电干扰,小波变换进行脑电特征提取,Hilbert变换获得脑电特征信号的瞬时相位,使用相位同步指数分析脑电活动的同步性.实验结果表明:Hilbert变换得到的相位同步指数能够较好地反映脑电的同步活动,为"大脑半球效价假说"提供了有效的依据.此外,在视听感知愉快情绪时,大脑皮层视觉区域占据主导作用,而感知悲伤情绪时,大脑皮层听觉区域占据主导作用.该研究可以被应用于大脑情绪认知和仿生机器人中.
To investigate the synchronization between different brain regions,an experimental paradigm for audio-visual stimulation based on six basic emotions(happiness,anger,sadness,surprise,disgust,and fear)was designed.By using Neuroscan 40 leads brain event related potentials instrument,EEG signal was collected.AR model and the coherent averaging method were used to remove baseline drift and the EEG interference.The Hilbert transform was used to get the phase of the EEG feature signal which was extracted by Wavelet transform.Then we used the phase synchronization index to analyze the synchronization of brain electrical activity.The result shows that the phase synchronization index based on Hilbert transform can better reflect the synchronization of EEG activity,also provides an effective basis for the hemisphere valence hypothesis.In addition,in the perception of happy mood,visual area in brain plays the dominant role,but in the perception of the sad mood,auditory area plays the dominant role.This research can be applied to the brain's emotional cognition and bionic robot.
出处
《测试技术学报》
2016年第1期86-91,共6页
Journal of Test and Measurement Technology
基金
国家基础科学人才培养基金(J1103210)
山西省自然科学基金资助项目(2013011016-2)
山西省回国留学人员科研资助项目(2014-010)
关键词
视听情绪
脑电信号
小波变换
HILBERT变换
相位同步指数
audio-visual emotion
electroencephalogram(EEG)
wavelet transform(WT)
hilbert transform(HT)
the phase synchronization index