| NONINVASIVE DETECTION OF BRAIN ACTIVITY VARIATION UNDER DIFFERENT DEPTH OF ANESTHESIA BY EEG COMPLEXITY |
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| 作者姓名： | 徐进 李雯雯 郑崇勋 景桂霞 刘雪良 |
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| 作者单位： | [1]The Key Laboratory of Biomedical Information Engineering of Ministry of Education, and Institute ofBiomedical Engineering, Xi＇an Jiaotong University, Xi＇an 710049, China. [2]Department of Information and Communication Engineering, School of Electronic ＆ Information, Xi＇an Jiaotong University, Xi＇an710049, China. [3]The First Affiliated Hospital of Medical School, Xi＇an Jiaotong University, Xi＇an 710061, China |
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| 摘 要： | Objective To detect the change of brain activity under different depth of anesthesia （DOA） noninvasively. A,fethods The Lempel-Ziv complexity C（n） was used to analyze EEG and its four components （delta, theta, alpha, beta）, which was recorded from SD rats under different DOA. The relationship between C（n） and DOA was studied. Results The C（n） of EEG will decrease while the depth of anesthesia increasing and vice versa. It can be used to detect the change of DOA sensitively. Compared with power spectrum, the change of C（n） is opposite to that of power spectrum. Only the C （n） of delta rhythm has obvious variations induced by the change of DOA, and the variations of delta is as similar as the EEG＇s. Conclusion The study shows that the desynchronized EEG is replaced by the synchronized EEG when rat goes into anesthesia state from awake, that is just the reason why complexity and power spectrum appear corresponding changes under different DOA. C（n） of delta rhythm dynamic change leads to the change of EEG, and the delta rhythm is the dominant rhythm during anesthesia for rats.
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| 关 键 词： | 脑活力 深度差异 麻醉 脑电图 |
| 文章编号： | 1671-8267（2006）01-0036-04 |
NONINVASIVE DETECTION OF BRAIN ACTIVITY VARIATION UNDER DIFFERENT DEPTH OF ANESTHESIA BY EEG COMPLEXITY |
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| Xu Jin,Li Wenwen,Zheng Chongxun,Jing Guixia,Liu Xueliang.NONINVASIVE DETECTION OF BRAIN ACTIVITY VARIATION UNDER DIFFERENT DEPTH OF ANESTHESIA BY EEG COMPLEXITY[J].Academic Journal of Xi’an Jiaotong University,2006,18(1):36-39. |
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| Authors: | Xu Jin Li Wenwen Zheng Chongxun Jing Guixia Liu Xueliang |
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| Abstract: | Objective To detect the change of brain activity under different depth of anesthesia (DOA) noninvasively. Methods The Lempel-Ziv complexity C(n) was used to analyze EEG and its four components (delta, theta, alpha, beta), which was recorded from SD rats under different DOA. The relationship between C(n) and DOA was studied. Results The C(n) of EEG will decrease while the depth of anesthesia increasing and vice versa. It can be used to detect the change of DOA sensitively. Compared with power spectrum, the change of C(n) is opposite to that of power spectrum. Only the C(n) of delta rhythm has obvious variations induced by the change of DOA, and the variations of delta is as similar as the EEG's. Conclusion The study shows that the desynchronized EEG is replaced by the synchronized EEG when rat goes into anesthesia state from awake, that is just the reason why complexity and power spectrum appear corresponding changes under different DOA. C(n) of delta rhythm dynamic change leads to the change of EEG, and the delta rhythm is the dominant rhythm during anesthesia for rats. |
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| Keywords: | complexity EEG depth of anesthesia (DOA) |
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