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

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology
04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic and Interventional Neuroradiology

UniBE Contributor:

Rummel, Christian; Abela, Eugenio; Hauf, Martinus; Wiest, Roland and Schindler, Kaspar Anton

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1951-6401

Publisher:

Springer Berlin Heidelberg

Language:

English

Submitter:

Valentina Rossetti

Date Deposited:

17 Jun 2014 11:31

Last Modified:

26 Jun 2018 14:50

Publisher DOI:

10.1140/epjst/e2013-01860-9

BORIS DOI:

10.7892/boris.53789

URI:

https://boris.unibe.ch/id/eprint/53789

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