%A Tchumatchenko,Tatjana %A Geisel,Theo %A Volgushev,Maxim %A Wolf,Fred %D 2010 %J Frontiers in Computational Neuroscience %C %F %G English %K correlation coefficient,count correlations,population models,Spike correlations,synchrony %Q %R 10.3389/neuro.10.001.2010 %W %L %M %P %7 %8 2010-April-08 %9 Original Research %+ Mrs Tatjana Tchumatchenko,Bernstein Center for Computational Neuroscience,Göttingen,Germany,tatjana.tchumatchenko@brain.mpg.de %+ Mrs Tatjana Tchumatchenko,Göttingen Graduate School for Neurosciences and Molecular Biosciences,Göttingen,Germany,tatjana.tchumatchenko@brain.mpg.de %+ Mrs Tatjana Tchumatchenko,Max Planck Institute for Dynamics and Self-Organization,Göttingen,Germany,tatjana.tchumatchenko@brain.mpg.de %# %! Synchrony signatures in count correlations %* %< %T Signatures of synchrony in pairwise count correlations %U https://www.frontiersin.org/articles/10.3389/neuro.10.001.2010 %V 4 %0 JOURNAL ARTICLE %@ 1662-5188 %X Concerted neural activity can reflect specific features of sensory stimuli or behavioral tasks. Correlation coefficients and count correlations are frequently used to measure correlations between neurons, design synthetic spike trains and build population models. But are correlation coefficients always a reliable measure of input correlations? Here, we consider a stochastic model for the generation of correlated spike sequences which replicate neuronal pairwise correlations in many important aspects. We investigate under which conditions the correlation coefficients reflect the degree of input synchrony and when they can be used to build population models. We find that correlation coefficients can be a poor indicator of input synchrony for some cases of input correlations. In particular, count correlations computed for large time bins can vanish despite the presence of input correlations. These findings suggest that network models or potential coding schemes of neural population activity need to incorporate temporal properties of correlated inputs and take into consideration the regimes of firing rates and correlation strengths to ensure that their building blocks are an unambiguous measures of synchrony.