Investigation of the non-markovity spectrum as a cognitive processing measure of deep brain microelectrode recordings

P. A. Meehan, P. A. Bellette, A. P. Bradley, J. E. Castner, H. J. Chenery, David A. Copland, J. D. Varghese, T. Coyne, Peter A. Silburn

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

3 Citations (Scopus)

Abstract

Previous research has shown that changes in complexity-based measures of deep brain (DB) microelectrode recordings (MER) from conscious human patients, show correlations with different linguistic tasks. These statistical mechanics based measures are further expanded in this research to look at the spectra of an adapted non-Markovity parameter in different frequency ranges as a measure of synchronous neuronal networked behaviour. Results presented show statistically significant interaction between hemisphere of recording, epoch of brain function and semantic category in the fast frequency range (80-200Hz). Processing of similar semantic words appeared to be associated with increased synchrony in the left hand hemisphere. Evidence for substantial left and right hemispherical interactions was found. Similar, but less important trends were found in the beta band (10-30Hz). Significant but less specific correlations were also found in the theta (4-10Hz) and gamma (30-80Hz) frequency bands.

Original languageEnglish
Title of host publicationBIOSIGNALS 2011 - Proceedings of the International Conference on Bio-Inspired Systems and Signal Processing
Place of PublicationAustralia
PublisherIOS Press
Pages144-150
Number of pages7
ISBN (Print)9789898425355
Publication statusPublished - 2011
Externally publishedYes
EventInternational Conference on Bio-Inspired Systems and Signal Processing, BIOSIGNALS 2011 - Rome, Rome, Italy
Duration: 26 Jan 201129 Jan 2011

Conference

ConferenceInternational Conference on Bio-Inspired Systems and Signal Processing, BIOSIGNALS 2011
CountryItaly
CityRome
Period26/01/1129/01/11

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