ISSN 0869-6632 (Print)
ISSN 2542-1905 (Online)


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Dumskij D. V., Pavlov A. N., Tupicyn A. N., Makarov V. V. Classification of neuronal action potentials using wavelet-transform. Izvestiya VUZ. Applied Nonlinear Dynamics, 2005, vol. 13, iss. 6, pp. 77-98. DOI: 10.18500/0869-6632-2005-13-5-77-98

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Russian
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Article
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519.6:577.359

Classification of neuronal action potentials using wavelet-transform

Autors: 
Dumskij Dmitrij Viktorovich, Saratov State University
Pavlov Aleksej Nikolaevich, Saratov State University
Tupicyn Anatolij Nikolaevich, Saratov State University
Makarov Vladimir Vladimirovich, Saratov State University
Abstract: 

In this paper, a comparative study of methods for classification of neuronal action potentials is performed, namely, the standard Principal Component Analysis (PCA) and techniques based on the wavelet-transform. It is shown that there are at least two cases when the wavelet-based approaches have advantages: 1) the presence of a small-scale structure in the shapes of spikes, and 2) the presence of slow noise of high intensity. It is stated that the quality of spike-sorting can be increased by signal’s filtering. The problem of choosing optimal wavelet-coefficients for spike classification is discussed. Proposed method is based on combination of the PCA and the wavelet-transform. Main idea of the method consists in the estimation of typical spike waveforms and in the use of those wavelet-coefficients that provide maximal distinctions between the chosen waveforms. The suggested approach allows us to reduce classification errors.

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Received: 
02.06.2005
Accepted: 
03.11.2005
Published: 
28.02.2006
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