| 刺激前后脑电α波相位重排现象研究 |
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| 引用本文： | 李凌,尧德中,刘铁军,赵丽娜.刺激前后脑电α波相位重排现象研究[J].电子科技大学学报(社会科学版),2006(1). |
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| 作者姓名： | 李凌 尧德中 刘铁军 赵丽娜 |
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| 作者单位： | 电子科技大学生命科学与技术学院 成都610054 |
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| 基金项目： | 国家自然科学基金资助项目(90208003)，高等学校博士学科点专项科研基金资助项目 |
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| 摘 要： | 对8个被试在视听觉同步刺激模式下采集的脑电数据,选择O1电极探讨刺激前后,从自发脑电到诱发脑电过程中α波(8～13Hz)相位重排现象。计算每次刺激前的幅度(Pr)、相位(φ),和刺激后的第一个正(P)波和第一个负(N)波的潜伏期与幅度共6个参数。提出了Pr和P、N波幅度之间的3次多项式模型;采用线性回归中异常值检验法量化相位重排的程度,结果表明:从自发脑电到诱发脑电的过程中,α波的相位存在明显的重排现象。
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| 关 键 词： | 自发脑电 诱发脑电 相位重排 α波 统计检验 |
A Study of the Phase Resetting from Ongoing EEG to Single Trial EPs of Alpha Wave |
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| LI Ling,YAO De-zhong,LIU Tie-jun,ZHAO Li-na.A Study of the Phase Resetting from Ongoing EEG to Single Trial EPs of Alpha Wave[J].Journal of University of Electronic Science and Technology of China(Social Sciences Edition),2006(1). |
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| Authors: | LI Ling YAO De-zhong LIU Tie-jun ZHAO Li-na |
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| Abstract: | The phase resetting from pre-stimulus to post-stimulus alpha wave (8~13 Hz) in eight healthy subjects is studied. The six parameters of single trail alpha wave are computed and analyzed: pre-stimulus amplitude and phase angle, post-stimulus amplitude and latency of first positive and negative peak. The amplitude relationship between pre-and two post-stimuli can be described by a cubic polynomial model. By using the method of outlying cases test in linear regression, we can quantitatively analyze the degree of phase resetting. The results demonstrate that there is partial phase resetting from pre-to post-stimuli in the band of alpha wave. |
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| Keywords: | electroencephalogram evoked potentials phase resetting alpha wave statistical test |
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