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Investigation of the non-markovity spectrum as a cognitive processing measure of deep brain microelectrode recordings
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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 (S0-200Hz). 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 (I 0-30Hz). Significant but less specific correlations were also found in the theta (4-lOHz) and gamma (30-80Hz) frequency bands.
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Keyword:
1711 Signal Processing; 2204 Biomedical Engineering; Deep brain; Linguistics; Microelectrode recordings; Neural networks; Non-Markovity; Synchrony
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URL: https://espace.library.uq.edu.au/view/UQ:238153
https://espace.library.uq.edu.au/view/UQ:238153/UQ_4511_001.pdf
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