Role of Alpha Oscillations During Short Time Memory Task Investigated by Graph Based Partitioning
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Date
2013-04
Authors
Aydin, Cagatay
Oktay, Oytun
Gunebakan, Adem Umut
Ademoglu, Ahmet
Ciftci, Rifat Koray
ORCID
Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Společnost pro radioelektronické inženýrství
Abstract
In this study, we investigate the clustering pattern of alpha band (8 Hz - 12 Hz) electroencephalogram (EEG) oscillations obtained from healthy individuals during a short time memory task with 3 different memory loads. The retention period during which subjects were asked to memorize a pattern in a square matrix is analyzed with a graph theoretical approach. The functional coupling among EEG electrodes are quantified via mutual information in the time-frequency plane. A spectral clustering algorithm followed by bootstrapping is used to parcellate memory related circuits and for identifying significant clusters in the brain. The main outcome of the study is that the size of the significant clusters formed by alpha oscillations decreases as the memory load increases. This finding corroborates the active inhibition hypothesis about alpha oscillations.
Description
Citation
Radioengineering. 2013, vol. 22, č. 1, s. 123-131. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2013/13_01_0123_0131.pdf
http://www.radioeng.cz/fulltexts/2013/13_01_0123_0131.pdf
Document type
Peer-reviewed
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Published version
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Language of document
en