tailieunhanh - Báo cáo hóa học: " Research Article Comparison of Synchronization Indices: Behavioral Study"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Comparison of Synchronization Indices: Behavioral Study | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2009 Article ID510235 7 pages doi 2009 510235 Research Article Comparison of Synchronization Indices Behavioral Study Pierre Dugue 1 Regine Le Bouquin-Jeannes EURASIP Member 2 and Gerard Faucon3 IINSERM U642 35000 Rennes France 2LTSI Universite de Rennes 1 35000 Rennes France 3LTSI Universite de Rennes 1 Campus de Beaulieu 35042 Rennes Cedex France Correspondence should be addressed to Regine Le Bouquin-Jeannes Received 4 September 2008 Revised 19 January 2009 Accepted 1 April 2009 Recommended by George Tombras The synchronization of a neuronal response to a given periodic stimulus is usually measured by Goldberg and Brown s vector strength metric. This index does not take omitted spikes into account. This particular limitation has motivated the development of two new indices the corrected vector strength index and the corrected phase variance index both including a penalty factor linked to the firing rate. In this paper a theoretical study on the normalization of the corrected phase variance index is conducted. Both indices are compared to four existing ones using a simulated dataset which considers three desynchronizing disturbances irregularity in firing added spikes and omitted spikes. In the case of unimodal responses the two new indices are satisfying and appear the more promising in the case of real signals. In the multimodal case the entropy-based index is better than the others even if this index is not drawback-free. Copyright 2009 Pierre Dugue et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction Three criteria are generally used to analyze neuronal responses to periodic stimuli post stimulus time histogram or period histogram in this context