Ordinal patterns in epileptic brains: Analysis of intracranial EEG and simultaneous EEG-fMRI

Rummel, Christian; Abela, Eugenio; Hauf, Martinus; Wiest, Roland; Schindler, Kaspar (2013). Ordinal patterns in epileptic brains: Analysis of intracranial EEG and simultaneous EEG-fMRI. The European Physical Journal Special Topics, 222(2), pp. 569-585. Springer Berlin Heidelberg 10.1140/epjst/e2013-01860-9

Preview

Text Rummel2013_Epjst.pdf - Published Version Available under License Publisher holds Copyright. Download (1MB) | Preview

Epileptic seizures are associated with high behavioral stereotypy of the patients. In the EEG of epilepsy patients characteristic signal patterns can be found during and between seizures. Here we use ordinal patterns to analyze EEGs of epilepsy patients and quantify the degree of signal determinism. Besides relative signal redundancy and the fraction of forbidden patterns we introduce the fraction of under-represented patterns as a new measure. Using the logistic map, parameter scans are performed to explore the sensitivity of the measures to signal determinism. Thereafter, application is made to two types of EEGs recorded in two epilepsy patients. Intracranial EEG shows pronounced determinism peaks during seizures. Finally, we demonstrate that ordinal patterns may be useful for improving analysis of non-invasive simultaneous EEG-fMRI.

Interest & Impact

Downloads

183 since deposited on 17 Jun 2014
26 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item