[Extracting and analyzing rabbit somatosensory evoked potential on the basis of continuous wavelet transform and multi-resolution analysis].
This study was directed at extracting the rabbit somatosensory evoked potential (SEP), locating and analyzing the waveform of rabbit SEP. The rabbit was narcotized and stimulated by 0.5 Hz electric pulse. Potential of scalp was sampled at 3.764 Hz. Rabbit somatosensory evoked potential was extracted by one-dimension multi-resolution analysis, and continuous wavelet transform (CWT) was employed to locate and analyze the wave of SEP. The study results showed that Single-trail SEP can be extracted by Daubechies wavelet, when wavelet transform result of single-trail was compared with the result of averaged SEP. Wave component of SEP can be located precisely through the method of continuous wavelet transform. Frequency feature of SEP can also be analyzed by CWT. The technique of continuous wavelet transform, which can project a one-dimension signal into a two-dimension time-frequency space, shows good application prospect of processing medical electronic signal.
Li
Zhangyong
Z
College of Bio-information, Chongqing University of Posts and Telecommunications, Chongqing 400065, China. li9547@yahoo.com.cn
Zhao
Zhiqiang
Z
Liu
Shengrong
S
Xie
Zhengxiang
Z
Lu
Jie
J
D000465:Algorithms; D000818:Animals; D004558:Electric Stimulation; D005073:Evoked Potentials, Somatosensory / Q000502:physiology*; D005583:Fourier Analysis; D011817:Rabbits; D012815:Signal Processing, Computer-Assisted