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Magnetic detection of sleep spindles in normal subjects.

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1
Institute of Brain Diseases, Tohoku University School of Medicine, Sendai, Japan.

Abstract

The magnetoencephalogram (MEG) and electroencephalogram (EEG) were recorded simultaneously from 3 normal subjects during light sleep. The extracranial magnetic field patterns associated with the ionic currents within the brain (MEG) were measured using a SQUID magnetometer in a magnetically shielded room. Although a previous report indicated that there are few sleep spindles in MEG records, we observed many in all 3 subjects. We believe this is because measurements were made vertically at the vertex region.

PMID:
1697240
[Indexed for MEDLINE]
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