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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
4
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pubmed:dateCreated |
1997-2-19
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pubmed:abstractText |
Yawning is a complex event that depends largely on the autonomic nervous system. Microneurographic techniques were used to study the mechanism involved in yawning. A series of spontaneous yawns displayed by a healthy 39-year-old male offered us the opportunity to study the muscle sympathetic nerve activity (MSNA) during this phenomenon. It was found that 2 s of yawning inhibited the MSNA recorded at the right peroneal nerve in the lateral knee area, while 3 s of slow expiration succeeding a yawn provoked an MSNA discharge. Blood pressure decreased with each slow expiration by 5-6 mmHg, and increased again with the renewed MSNA discharge. We conclude that yawning is associated with a sympathetic suppression that favours a parasympathetic dominance, as indicated by the MSNA and the decrease in blood pressure. The slow expiration following a yawn is associated with a sympathetic activation marked by an MSNA discharge and an increase in blood pressure.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
|
pubmed:status |
MEDLINE
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pubmed:month |
Aug
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pubmed:issn |
0959-9851
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
6
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
237-9
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pubmed:dateRevised |
2004-11-17
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pubmed:meshHeading |
pubmed-meshheading:8902321-Adult,
pubmed-meshheading:8902321-Blood Pressure,
pubmed-meshheading:8902321-Humans,
pubmed-meshheading:8902321-Male,
pubmed-meshheading:8902321-Microelectrodes,
pubmed-meshheading:8902321-Muscle, Skeletal,
pubmed-meshheading:8902321-Parasympathetic Nervous System,
pubmed-meshheading:8902321-Respiratory Mechanics,
pubmed-meshheading:8902321-Supine Position,
pubmed-meshheading:8902321-Sympathetic Nervous System,
pubmed-meshheading:8902321-Yawning
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pubmed:year |
1996
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pubmed:articleTitle |
Inhibition of muscle sympathetic nerve activity during yawning.
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pubmed:affiliation |
Sleep Medicine Institute, Sheba Medical Centre, Sackler School of Medicine, Tel Aviv University, Israel.
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pubmed:publicationType |
Journal Article,
Case Reports
|