Correlation dimension and integral do not predict epileptic seizures

M A F Harrison, Ivan Osorio, M G Frei, S Asuri, Ying-Cheng Lai

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)


Reports in the literature have indicated potential value of the correlation integral and dimension for prediction of epileptic seizures up to several minutes before electrographic onset. We apply these measures to over 2000 total hours of continuous electrocortiogram, taken from 20 patients with epilepsy, examine their sensitivity to quantifiable properties such as the signal amplitude and autocorrelation, and investigate the influence of embedding and filtering strategies on their performance. The results are compared against those obtained from surrogate time series. Our conclusion is that neither the correlation dimension nor the correlation integral has predictive power for seizures. (C) 2005 American Institute of Physics.

Original languageEnglish
Article number033106
Number of pages15
Issue number3
Publication statusPublished - Sept 2005


  • brain electrical activity
  • time-series analysis
  • interspike intervals
  • strange attractors
  • clinical onset
  • synchronization
  • reconstruction
  • system


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