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   -> Volume 6, Issue 9

Preprint: TF analysis of electroencephalogram series.
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Alejandra Figliola (

PostPosted: Tue Aug 19, 1997 8:34 pm    
Subject: Preprint: TF analysis of electroencephalogram series.
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#3 Preprint: TF analysis of electroencephalogram series.

Title: Time-frequency analysis of electroencephalogram series (III):
Wavelet Packets and Information Cost Function.

Authors S. Blanco, A. Figliola R. Quian Quiroga, O. A. Rosso and
E. Serrano

Address Instituto de Calculo,
Facultad de Ciencias Exactas y Naturales,
Universidad de Buenos Aires.
Pabellon II,
Ciudad Universitaria.
1428 Buenos Aires, Argentina.



Signals obtained during tonic-clonic epileptic seizures are usually
neglected for analysis by the physicians due to the presence of noise
caused by muscle contractions. Although noise obscures completely the
recording, some information about the underlying brain activity can be
obtained with Wavelet Transform by filtering those frequencies
associated with muscle activity. One great advantage of this method
over traditional filtering is that the filtered frequencies do not
modify the pattern of the remanent ones. An accurate analysis of the
different seizure stages was achieved using the Wavelet Packets method
and throught the ICF the brain dynamical behavior can be accessed.
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