Multiresolution wavelet analysis of evoked potentials
- 1 January 1993
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Biomedical Engineering
- Vol. 40 (11) , 1085-1094
- https://doi.org/10.1109/10.245625
Abstract
Neurological injury, such as from cerebral hypoxia, appears to cause complex changes in the shape of evoked potential (EP) signals. To characterize such changes we analyze EP signals with the aid of scaling functions called wavelets. In particular, we consider multiresolution wavelets that are a family of orthonormal functions. In the time domain, the multiresolution wavelets analyze EP signals at coarse or successively greater levels of temporal detail. In the frequency domain, the multiresolution wavelets resolve the EP signal into independent spectral bands. In an experimental demonstration of the method, somatosensory EP signals recorded during cerebral hypoxia in anesthetized cats are analyzed. Results obtained by multiresolution wavelet analysis are compared with conventional time-domain analysis and Fourier series expansions of the same signals. Multiresolution wavelet analysis appears to be a different, sensitive way to analyze EP signal features and to follow the EP signal trends in neurologic injury. Two characteristics appear to be of diagnostic value: the detail component of the MRW displays an early and a more rapid decline in response to hypoxic injury while the coarse component displays an earlier recovery upon reoxygenation.Keywords
This publication has 16 references indexed in Scilit:
- Detection of late potentials by means of wavelet transformPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Adaptive Fourier series modeling of time-varying evoked potentials: study of human somatosensory evoked response to etomidate anestheticElectroencephalography and Clinical Neurophysiology/Evoked Potentials Section, 1991
- A theory for multiresolution signal decomposition: the wavelet representationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1989
- Time-frequency distributions-a reviewProceedings of the IEEE, 1989
- Adaptive Fourier estimation of time-varying evoked potentialsIEEE Transactions on Biomedical Engineering, 1989
- Multifrequency channel decompositions of images and wavelet modelsIEEE Transactions on Acoustics, Speech, and Signal Processing, 1989
- Continuous and Simultaneous Monitoring of EEG Spectra and Brainstem Auditory and Somatosensory Evoked Potentials in the Intensive Care Unit and the Operating RoomJournal Of Clinical Neurophysiology, 1987
- ANALYSIS OF SOUND PATTERNS THROUGH WAVELET TRANSFORMSInternational Journal of Pattern Recognition and Artificial Intelligence, 1987
- Methods for the identification of evoked response components in the frequency and combined time/frequency domainsElectroencephalography and Clinical Neurophysiology/Evoked Potentials Section, 1986
- Progressive alteration of somatosensory evoked potential waveforms with lowering of cerebral tissue Po2in the rabbitArchives Internationales de Physiologie et de Biochimie, 1978