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|Title:||A novel and fully automatic spike-sorting implementation with variable number of features|
|Authors:||Chaure, Fernando J.|
Rey, Hernan G.
Quian Quiroga, Rodrigo
|Publisher:||American Physiological Society|
|Citation:||Journal of Neurophysiology, 2018, 120, pp. 1859-1871|
|Abstract:||The most widely used spike-sorting algorithms are semiautomatic in practice, requiring manual tuning of the automatic solution to achieve good performance. In this work, we propose a new fully automatic spike-sorting algorithm that can capture multiple clusters of different sizes and densities. In addition, we introduce an improved feature selection method, by using a variable number of wavelet coefficients, based on the degree of non-Gaussianity of their distributions. We evaluated the performance of the proposed algorithm with real and simulated data. With real data from single-channel recordings, in ~95% of the cases the new algorithm replicated, in an unsupervised way, the solutions obtained by expert sorters, who manually optimized the solution of a previous semiautomatic algorithm. This was done while maintaining a low number of false positives. With simulated data from single-channel and tetrode recordings, the new algorithm was able to correctly detect many more neurons compared with previous implementations and also compared with recently introduced algorithms, while significantly reducing the number of false positives. In addition, the proposed algorithm showed good performance when tested with real tetrode recordings.|
|Rights:||Copyright © the authors, 2018. This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.|
|Appears in Collections:||Published Articles, Dept. of Neuroscience, Psychology and Behaviour|
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|jn.00339.2018.pdf||Published (publisher PDF)||3.76 MB||Adobe PDF||View/Open|
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