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PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
1992-1-8
pubmed:abstractText
To assess how REM/NREM periods can be linked to the determination of the REM/NREM sleep and/or awake state, we have investigated the relationship between the REM/NREM periods and penile tumescence in the human fetus. This study was made on 11 male fetuses from 36 to 41 weeks of gestation. Eye movement and penile tumescence were simultaneously examined with an observation window of 60 min, using two separate real-time ultrasound systems. The mean percentage of the total duration of penile tumescence during the REM period and that during the NREM period was 77.7 and 15.8%, respectively. In all cases, the total duration of penile tumescence during the REM period against REM duration was greater than the duration of tumescence during the NREM period against NREM duration with statistical significance. This indicates that the fetal penile tumescence is strongly associated with REM period and the REM period containing penile tumescence in the human fetus can be considered equivalent to REM sleep in utero. In addition, the finding that there exists a part of the REM period lacking penile tumescence suggests the possible origin of the awake state, brought about by advances in fetal development at this stage of gestation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:issn
0006-3126
pubmed:author
pubmed:issnType
Print
pubmed:volume
60 Suppl 1
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
30-5
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
REM sleep determined using in utero penile tumescence in the human fetus at term.
pubmed:affiliation
Maternity and Perinatal Care Unit, Kyushu University Hospital, Fukuoka, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't