| 在单一模式和双模式刺激下gamma节律与ERP的同步效应 |
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| 引用本文： | 王明时 刘瑾 诸强 陈韵. 在单一模式和双模式刺激下gamma节律与ERP的同步效应[J]. 生物医学工程学杂志, 2005, 22(5): 884-889 |
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| 作者姓名： | 王明时 刘瑾 诸强 陈韵 |
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| 作者单位： | 天津大学精密仪器与光电子工程学院生物医学工程与科学仪器系 天津300072(王明时，刘瑾)，北方交通大学计算机与信息技术学院生物医学工程系 北京100044(诸强)，天津大学精密仪器与光电子工程学院生物医学工程与科学仪器系 天津300072(陈韵) |
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| 基金项目： | 国家自然科学基金资助项目(30170308) |
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| 摘 要： | 探讨视觉单一刺激、听觉单一刺激和视听双模式刺激的情况下,诱发脑电中的gamma节律的活动与刺激和ERP成分的同步效应。利用小波变换提取EEG诱发电位中的gamma节律成分,并用Gabor变换对其进行时频分析,结果发现gamma节律的活动不仅与外源性的刺激信号有关,而且与ERP的内源性成分(如N2b、P300)也具有明显的同步关系。同时,通过gamma节律在视听交叉模式下的活动规律也体现了人脑在多感觉模式下感觉的交叉与综合。根据在听力信号刺激后100~200ms左右出现的gamma活动增强,认为gamma波活动可能与大脑对声音信号的感知有关。
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| 关 键 词： | gamma节律 双感觉模式 事件相关电位 P300 N2b |
| 收稿时间： | 2003-07-28 |
| 修稿时间： | 2003-07-282003-12-10 |
Synchronization of the Activity of Gamma Oscillation and ERP Components |
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| Wang Mingshi, Liu Jin, Zhu Qiang, Chen Yun. Synchronization of the Activity of Gamma Oscillation and ERP Components[J]. Journal of biomedical engineering, 2005, 22(5): 884-889 |
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| Authors: | Wang Mingshi Liu Jin Zhu Qiang Chen Yun |
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| Affiliation: | 1.Department of Biomedical Engineering and Scientific Instruments, College of Precision Instruments and Optoelectronic Engineering, Tianjin University, Tianjin 300072,China; 2 .Department of Biomedical Engineering, College of Computer and Information Technology, Beijing Jiaotong University, Beijing 100044,China |
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| Abstract: | In the present study the activity of the gamma oscillation synchronized with the stimuli and ERP is investigated by means of unimodal and bimodal experiments. The multiresolution wavelet algorithm is used for signal extraction and Gabor transform is employed to represent the temporal evolution of the selected frequency components. The results show that the gamma oscillation is strongly phase-locked not only with the exogenous stimuli in the three experiments, but also with the endogenous components of ERPs (N2b,P300). And the ERP and the gamma oscillation induced by the bimodal stimuli show the audio-visual bisensory integration and relationship. In addition, the results from the experiments with the auditory stimuli show that the gamma oscillation may be closely related to the perception of auditory signals. |
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| Keywords: | Gamma oscillation Bisensory Event-related potentials(ERP) P300 N2b |
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