Detection of very high correlation in the alpha band between temporal regions of the human brain using MEG

It is generally believed that alpha band (8–12 Hz) electric and magnetic activity in the area of the left and right temporal regions in the human brain are at best poorly correlated. There are no previous reports of very high alpha band correlation between left and right temporal regions by magnetoe...

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Bibliographic Details
Published in:NeuroImage (Orlando, Fla.) Fla.), 2004-08, Vol.22 (4), p.1432-1437
Main Authors: Cover, K.S, Stam, C.J, van Dijk, B.W
Format: Article
Language:English
Subjects:
Adult
Alpha band
Alpha Rhythm
Dominance, Cerebral - physiology
Electroencephalography
Female
Humans
Hypotheses
Magnetic fields
Magnetoencephalography
Magnetoencephalography - statistics & numerical data
Male
Middle Aged
Multiple sclerosis
Nerve Net - physiology
Reference Values
Statistics as Topic
Temporal Lobe - physiology
Temporal regions
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Summary:It is generally believed that alpha band (8–12 Hz) electric and magnetic activity in the area of the left and right temporal regions in the human brain are at best poorly correlated. There are no previous reports of very high alpha band correlation between left and right temporal regions by magnetoencephalography (MEG) or electroencephalography (EEG). We present whole head magnetoencephalography (MEG) results that demonstrate that, for temporal channels in the majority of healthy subjects tested, the alpha band signals are highly to very highly correlated and are antiparallel in direction. A correlation as high as −0.97 was found for a limited time in one subject. We suggest that the correlation found may be the consequence of strong direct or indirect coupling between homologue areas in left and right temporal regions rather than a common source. The correlation may provide a valuable index of loss of connectivity in the brain due to disease as well providing valuable insight to brain function and deserves further investigation.
ISSN:1053-8119
1095-9572
DOI:10.1016/j.neuroimage.2004.04.016