Title

Time-frequency representation of electrocorticograms in temporal lobe epilepsy

Document Type

Article

Abstract

Three time-frequency distributions are evaluated in terms of their efficacy in representing nonstationary electrocorticograms (ECoG's) in human temporal lobe epilepsy. The results of a new method, the exponential distribution, are compared with those of the spectrogram and the Wigner distribution. It is shown that the exponential distribution represents a considerable improvement over the spectrogram in terms of resolution and markedly reduces cross-terms present in the Wigner distribution. Exponential distribution representations of ECoG's from different stages of an epileptic record are developed as contour maps. These high-resolution representations offer a lucid display of temporal-spectral features of the rapidly varying signals that constitute ECoG's recorded in temporal lobe epilepsy.

Medical Subject Headings

Adult; Cerebral Cortex (physiopathology); Electroencephalography (methods); Epilepsy, Temporal Lobe (diagnosis, physiopathology); Humans; Mathematics; Time Factors

Publication Date

5-1-1992

Publication Title

IEEE transactions on bio-medical engineering

ISSN

0018-9294

Volume

39

Issue

5

First Page

502

Last Page

9

PubMed ID

1526640

Digital Object Identifier (DOI)

10.1109/10.135544

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