Multifractal detrended fluctuation analysis and local scale exponents of inter spike intervals

T. Ceranic, T. Loncar-Turukalo, L. Negyessy, E. Procyk, D. Bajic

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The study presents the analysis of detrended fluctuations (DFA) in inter spike intervals (ISI) of neuronal ensemble from cortex of awake behaving macaque monkeys. The original DFA method was applied to analyze fluctuation of variances from fitted trends of different order. The spectrum of local scale exponent was calculated to investigate the presence of different scaling regions. It was observed that the single scaling exponent is insufficient to describe the firing pattern dynamics, the better fit is achieved using both short-term α1 and long-term α2 scaling coefficients. The validation procedure using phase randomized surrogates provided more reliable local scale exponents' estimates. Generalized DFA analysis revealed the presence of multifractality in ISI time series. Results indicate that multifractality is partly due to the broad probability distribution function and partly due to the presence of long-range correlations. Isodistributional surrogate data were used to test the significance of generalized Hurst exponent spectrum and origin of multifractal behavior. In conclusion, both DFA and its multifractal expansion reveal the presence of long-range correlation in ISI time series indicating the presence of memory in the neuronal firing pattern.

Original languageEnglish
Title of host publication2012 IEEE 10th Jubilee International Symposium on Intelligent Systems and Informatics, SISY 2012
Pages519-524
Number of pages6
DOIs
Publication statusPublished - Dec 12 2012
Event2012 IEEE 10th Jubilee International Symposium on Intelligent Systems and Informatics, SISY 2012 - Subotica, Serbia
Duration: Sep 20 2012Sep 22 2012

Publication series

Name2012 IEEE 10th Jubilee International Symposium on Intelligent Systems and Informatics, SISY 2012

Other

Other2012 IEEE 10th Jubilee International Symposium on Intelligent Systems and Informatics, SISY 2012
CountrySerbia
CitySubotica
Period9/20/129/22/12

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ASJC Scopus subject areas

  • Artificial Intelligence
  • Information Systems

Cite this

Ceranic, T., Loncar-Turukalo, T., Negyessy, L., Procyk, E., & Bajic, D. (2012). Multifractal detrended fluctuation analysis and local scale exponents of inter spike intervals. In 2012 IEEE 10th Jubilee International Symposium on Intelligent Systems and Informatics, SISY 2012 (pp. 519-524). [6339577] (2012 IEEE 10th Jubilee International Symposium on Intelligent Systems and Informatics, SISY 2012). https://doi.org/10.1109/SISY.2012.6339577