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| 兔皮层体感诱发电位时频特征分析 | |
| 引用本文： | 李章勇,孟立,陆杰,向天雨,牛永红,马厚勋,谢正祥.兔皮层体感诱发电位时频特征分析[J].生物医学工程学杂志,2006,23(1):30-32. |
| 作者姓名： | 李章勇 孟立 陆杰 向天雨 牛永红 马厚勋 谢正祥 |
| 作者单位： | 1. 重庆邮电学院,生物信息学院,重庆,400065;重庆医科大学,生物医学工程研究室,重庆,400016 2. 重庆医科大学,生理学教研室,重庆,400016 3. 重庆医科大学,生物医学工程研究室,重庆,400016 |
| 基金项目： | 中国科学院资助项目;重庆市科委资助项目;重庆医科大学校科研和教改项目;重庆邮电学院校科研和教改项目 |
| 摘 要： | 分析兔皮层体感诱发电位的时域和频域特性。兔麻醉开颅，从大脑体感运动皮层引导诱发电位。连续多次刺激，以3800Hz采样率采样。测量每次诱发电位各个波形成分的峰潜伏期。分析诱发电位的功率谱。比较单次和叠加平均电位的时频特性。结果显示诱发成分时域变异性在一个刺激周期内随时间逐渐增大，诱发电位的频谱包括3个主要频谱包。叠加平均技术使信号产生波形融合，新波形产生，后发放成份消失等多种畸变。 |
| 关 键 词： | 体感诱发电位 频谱 单次提取 |
| 收稿时间： | 2003-07-01 |
| 修稿时间： | 2003-07-012003-12-30 |
Analysis on Time-Frequency Feature of Rabbit Cortical Somatosensory Evoked Potential |
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| Li Zhangyong,Meng Li,Lu Jie,Xiang Tianyu,Niu Yonghong,Ma Houxun,Xie Zhengxiang.Analysis on Time-Frequency Feature of Rabbit Cortical Somatosensory Evoked Potential[J].Journal of Biomedical Engineering,2006,23(1):30-32. | |
| Authors: | Li Zhangyong Meng Li Lu Jie Xiang Tianyu Niu Yonghong Ma Houxun Xie Zhengxiang |
| Institution: | 1 College of Bio-information, Chongqing University of Posts and Telecommunications, Chongqing 400065 ,China; 2 Dept. of Physiology, Chongqing University of Medical Sciences, Chongqing 400016,China; 3 Dept. of Biomedical Engineering, Chongqing University of Medical Sciences, Chongqing 400016 |
| Abstract: | This experiment was carried out to analyze the time-frequency feature of rabbit cortical somatosensory evoked potential(SEP).Rabbit was narcotized and subjected to craniotomy.SEP was from sensory and motor cortex.Stimulation was continuing many times and signal was sampled at(3 800 Hz.)The peak latency of each waveform was measured.Power spectrum of SEP was analyzed.The time-frequency feature of single-trial was compared with that of average SEP.It was found that the variability of single-trial SEP latency enlarges with time in a stimulation period.The spectrum of SEP includes three main frequency spectrum packages.The technique of summation makes a lot of signal aberration such as waveform confluence,new waveform emerging and after-discharging components dismissing. |
| Keywords: | Somatosensory evoked potential(SEP) Spectrum Single-trial extraction |
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