Spontaneous Slow Fluctuation of EEG Alpha Rhythm Reflects Activity in Deep-Brain Structures: A Simultaneous EEG-fMRI Study.

The emergence of the occipital alpha rhythm on brain electroencephalogram (EEG) is associated with brain activity in the cerebral neocortex and deep brain structures. To further understand the mechanisms of alpha rhythm power fluctuation, we performed simultaneous EEGs and functional magnetic resona...

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Autores principales:	Kei Omata, Takashi Hanakawa, Masako Morimoto, Manabu Honda
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/11ab95f20ac14d6c9832561f7055a80b
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spelling	oai:doaj.org-article:11ab95f20ac14d6c9832561f7055a80b2021-11-18T07:41:19ZSpontaneous Slow Fluctuation of EEG Alpha Rhythm Reflects Activity in Deep-Brain Structures: A Simultaneous EEG-fMRI Study.1932-620310.1371/journal.pone.0066869https://doaj.org/article/11ab95f20ac14d6c9832561f7055a80b2013-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0066869https://doaj.org/toc/1932-6203The emergence of the occipital alpha rhythm on brain electroencephalogram (EEG) is associated with brain activity in the cerebral neocortex and deep brain structures. To further understand the mechanisms of alpha rhythm power fluctuation, we performed simultaneous EEGs and functional magnetic resonance imaging recordings in human subjects during a resting state and explored the dynamic relationship between alpha power fluctuation and blood oxygenation level-dependent (BOLD) signals of the brain. Based on the frequency characteristics of the alpha power time series (APTS) during 20-minute EEG recordings, we divided the APTS into two components: fast fluctuation (0.04-0.167 Hz) and slow fluctuation (0-0.04 Hz). Analysis of the correlation between the MRI signal and each component revealed that the slow fluctuation component of alpha power was positively correlated with BOLD signal changes in the brain stem and the medial part of the thalamus and anterior cingulate cortex, while the fast fluctuation component was correlated with the lateral part of the thalamus and the anterior cingulate cortex, but not the brain stem. In summary, these data suggest that different subcortical structures contribute to slow and fast modulations of alpha spectra on brain EEG.Kei OmataTakashi HanakawaMasako MorimotoManabu HondaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 6, p e66869 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kei Omata Takashi Hanakawa Masako Morimoto Manabu Honda Spontaneous Slow Fluctuation of EEG Alpha Rhythm Reflects Activity in Deep-Brain Structures: A Simultaneous EEG-fMRI Study.
description	The emergence of the occipital alpha rhythm on brain electroencephalogram (EEG) is associated with brain activity in the cerebral neocortex and deep brain structures. To further understand the mechanisms of alpha rhythm power fluctuation, we performed simultaneous EEGs and functional magnetic resonance imaging recordings in human subjects during a resting state and explored the dynamic relationship between alpha power fluctuation and blood oxygenation level-dependent (BOLD) signals of the brain. Based on the frequency characteristics of the alpha power time series (APTS) during 20-minute EEG recordings, we divided the APTS into two components: fast fluctuation (0.04-0.167 Hz) and slow fluctuation (0-0.04 Hz). Analysis of the correlation between the MRI signal and each component revealed that the slow fluctuation component of alpha power was positively correlated with BOLD signal changes in the brain stem and the medial part of the thalamus and anterior cingulate cortex, while the fast fluctuation component was correlated with the lateral part of the thalamus and the anterior cingulate cortex, but not the brain stem. In summary, these data suggest that different subcortical structures contribute to slow and fast modulations of alpha spectra on brain EEG.
format	article
author	Kei Omata Takashi Hanakawa Masako Morimoto Manabu Honda
author_facet	Kei Omata Takashi Hanakawa Masako Morimoto Manabu Honda
author_sort	Kei Omata
title	Spontaneous Slow Fluctuation of EEG Alpha Rhythm Reflects Activity in Deep-Brain Structures: A Simultaneous EEG-fMRI Study.
title_short	Spontaneous Slow Fluctuation of EEG Alpha Rhythm Reflects Activity in Deep-Brain Structures: A Simultaneous EEG-fMRI Study.
title_full	Spontaneous Slow Fluctuation of EEG Alpha Rhythm Reflects Activity in Deep-Brain Structures: A Simultaneous EEG-fMRI Study.
title_fullStr	Spontaneous Slow Fluctuation of EEG Alpha Rhythm Reflects Activity in Deep-Brain Structures: A Simultaneous EEG-fMRI Study.
title_full_unstemmed	Spontaneous Slow Fluctuation of EEG Alpha Rhythm Reflects Activity in Deep-Brain Structures: A Simultaneous EEG-fMRI Study.
title_sort	spontaneous slow fluctuation of eeg alpha rhythm reflects activity in deep-brain structures: a simultaneous eeg-fmri study.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/11ab95f20ac14d6c9832561f7055a80b
work_keys_str_mv	AT keiomata spontaneousslowfluctuationofeegalpharhythmreflectsactivityindeepbrainstructuresasimultaneouseegfmristudy AT takashihanakawa spontaneousslowfluctuationofeegalpharhythmreflectsactivityindeepbrainstructuresasimultaneouseegfmristudy AT masakomorimoto spontaneousslowfluctuationofeegalpharhythmreflectsactivityindeepbrainstructuresasimultaneouseegfmristudy AT manabuhonda spontaneousslowfluctuationofeegalpharhythmreflectsactivityindeepbrainstructuresasimultaneouseegfmristudy
_version_	1718423079040843776

Spontaneous Slow Fluctuation of EEG Alpha Rhythm Reflects Activity in Deep-Brain Structures: A Simultaneous EEG-fMRI Study.

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