Document Detail

Topographic mapping of electroencephalography coherence in hypnagogic state.
MedLine Citation:
PMID:  9628119     Owner:  NLM     Status:  MEDLINE    
The present study examined the topographic characteristics of hypnagogic electroencephalography (EEG), using topographic mapping of EEG power and coherence corresponding to nine EEG stages (Hori's hypnagogic EEG stages). EEG stages 1 and 2, the EEG stages 3-8, and the EEG stage 9 each correspond with standard sleep stage W, 1 and 2, respectively. The dominant topographic components of delta and theta activities increased clearly from the vertex sharp-wave stage (the EEG stages 6 and 7) in the anterior-central areas. The dominant topographic component of alpha 3 activities increased clearly from the EEG stage 9 in the anterior-central areas. The dominant topographic component of sigma activities increased clearly from the EEG stage 8 in the central-parietal area. These results suggested basic sleep process might start before the onset of sleep stage 2 or of the manually scored spindles.
H Tanaka; M Hayashi; T Hori
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Psychiatry and clinical neurosciences     Volume:  52     ISSN:  1323-1316     ISO Abbreviation:  Psychiatry Clin. Neurosci.     Publication Date:  1998 Apr 
Date Detail:
Created Date:  1998-09-01     Completed Date:  1998-09-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9513551     Medline TA:  Psychiatry Clin Neurosci     Country:  AUSTRALIA    
Other Details:
Languages:  eng     Pagination:  147-8     Citation Subset:  IM    
Department of Behavioral Sciences, Faculty of Integrated Arts and Sciences, Hiroshima University, Kagamiyama, Higashi-Hiroshima, Japan.
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MeSH Terms
Alpha Rhythm
Brain Mapping*
Cerebral Cortex / physiology
Delta Rhythm
Dreams / physiology*
Fourier Analysis
Signal Processing, Computer-Assisted
Sleep Stages / physiology*

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