摘要
目的采用独立分量分析提取兔体感诱发电位。方法麻醉兔,以0.5Hz频率刺激兔下肢隐神经,3764Hz采样率收集兔头皮电位。建立连续刺激同一采集点,采集3次混合背景噪声的信号,构建独立分量分析模型,用独立分量分析技术分解信号。结果获得了独立的体感诱发电位成分。结论连续延迟的信号源模型适合脑诱发电位,独立分量分析技术可以提取出诱发电位成分。
Objective To extract rabbit somatosensory evoked potentials (SEP), by using a new technique named independent component analysis. Method The rabbit was narcotized and stimulated with 0.5 Hz electric pulse. Potentials at scalp was sampled at 3 764 Hz. Response signals to repeated stimulations for 3 times mixed with background noise was acquired at the same collection point. Independent component analysis (ICA) for SEP was established. The mixed signals were decomposed by ICA to observe the independent components. Result Independent SEP was acquired. Conclusion A time lag of continuous signal source is suitable to SEP model. ICA can extract signals of SEP components.
出处
《航天医学与医学工程》
CAS
CSCD
北大核心
2005年第2期112-116,共5页
Space Medicine & Medical Engineering
基金
国家自然科学基金(60471041)
重庆邮电学院自然科学基金(A200461)
关键词
独立分量分析
诱发电位
脑电提取
单次提取
independent component analysis
evoked potentials
potentials extraction
single-trail
