Skip to content


Open Access

Comparison of Synchronization Indices: Behavioral Study

  • Pierre Dugué1,
  • Régine Le Bouquin-Jeannès2Email author and
  • Gérard Faucon3
EURASIP Journal on Advances in Signal Processing20092009:510235

Received: 4 September 2008

Accepted: 1 April 2009

Published: 16 April 2009


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.


Information TechnologyFiring RateQuantum InformationBehavioral StudyPhase Variance

Publisher note

To access the full article, please see PDF.

Authors’ Affiliations

INSERM, Rennes, France
LTSI, Rennes, France
LTSI, Campus de Beaulieu, France


© Pierre Dugué et al. 2009

This article is published under license to BioMed Central Ltd. 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.