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2007

Sorting of neural spikes: When wavelet based methods outperform principal component analysis

8 years 11 months ago
Sorting of neural spikes: When wavelet based methods outperform principal component analysis
Sorting of the extracellularly recorded spikes is a basic prerequisite for analysis of the cooperative neural behavior and neural code. Fundamentally the sorting performance is defined by the quality of discriminative features extracted from spike waveforms. Here we discuss two features extraction approaches: principal component analysis (PCA), and wavelet transform (WT). We show that only when properly tuned to the data, the WT technique may outperform PCA. We present a novel method for extraction of spike features based on a combination of PCA and continuous WT. The method automatically tunes its WT part to the data structure making use of knowledge obtained by PCA. We demonstrate the method on simulated and experimental data sets. Key words: clustering, neural spikes, spike sorting, wavelet analysis Abbreviations: PCA – principal component analysis; WF – wave form; WSAC – wavelet shape-accounting classifier; WSPC – wavelet-classifier with superparamagnetic clustering; WSC...
Alexey N. Pavlov, Valeri A. Makarov, Ioulia Makaro
Added 27 Dec 2010
Updated 27 Dec 2010
Type Journal
Year 2007
Where NC
Authors Alexey N. Pavlov, Valeri A. Makarov, Ioulia Makarova, Fivos Panetsos
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