Role of Alpha Oscillations During Short Time Memory Task Investigated by Graph Based Partitioning

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Küçük Resim

Tarih

2013

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Spolecnost Pro Radioelektronicke Inzenyrstvi

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

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.

Açıklama

Anahtar Kelimeler

EEG, brain, graph theory, memory, spectral clustering, information theory, Eeg-Alpha, Mutual Information, Brain, Synchronization, Increase, Load

Kaynak

Radioengineering

WoS Q Değeri

Q3

Scopus Q Değeri

Q3

Cilt

22

Sayı

1

Künye