II. Definitions

  1. Yawning
    1. Involuntary deep inspiration with the mouth open, typically stretched to maximal opening, followed by slow expiration
    2. Yawning, on average, lasts 5 seconds, and is often associated with drowsiness or boredom
    3. Often triggered when others yawn (or even reading or thinking about Yawning)

III. Physiology

  1. Yawning has a positive effect on arousal and Heart Rate, possibly from carotid body stimulation
    1. Yawning is often observed during times of low social interaction (e.g. lectures, studying, driving, watching television)
  2. Yawning may also provide another mechanism of Thermoregulation, providing cooling to counter Temperature increase
  3. Yawning clears eustachian tube pressure (similar to Valsalva Maneuver activity)
  4. Yawning is considered among empathy skills in humans (hence the triggered Yawning when others yawn)

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Related Studies

Ontology: Yawning (C0043387)

Definition (NCI) An involuntary deep inhalation with the mouth open, often a sign of drowsiness or boredom.
Definition (MSH) An involuntary deep INHALATION with the MOUTH open, often accompanied by the act of stretching.
Concepts Finding (T033)
MSH D015000
SnomedCT 207061000, 37993006, 248626009, 301250005
LNC LA15892-5
English Yawning, Yawnings, YAWNING, [D]Yawning, [D]Yawning (context-dependent category), Yawning, function, yawning (symptom), yawning, yawn, yawns, [D]Yawning (situation), Yawn, Observation of yawning, Finding of yawning (finding), Finding of yawning, Yawning (finding), Yawning, function (observable entity), Yawning (function)
French BAILLEMENT, Baîllements, Baillement, Bâillement
Portuguese BOCEJO, Bocejo
German GAEHNEN, Gaehnen, Gähnen
Dutch geeuw, geeuwen, Gapen
Italian Sbadigliare, Sbadiglio
Japanese あくび, アクビ
Swedish Gäspning
Spanish [D]bostezos (categoría dependiente del contexto), BOSTEZOS, bostezo - hallazgo, hallazgo relacionado con el bostezo, hallazgo relacionado con el bostezo (hallazgo), bostezo - hallazgo (hallazgo), [D]bostezos, [D]bostezos (situación), bostezar, bostezo (entidad observable), bostezo (función), bostezo (hallazgo), bostezo, oscitación, Bostezos, Bostezo
Czech zívání, Zívat, Zívání
Finnish Haukottelu
Polish Ziewanie
Hungarian Ásítás, Ásít
Norwegian Gjesping, Gjesp

Ontology: Yawning excessive (C0235207)

Concepts Finding (T033)
English YAWNING EXCESSIVE, Yawning excessive, excessive yawning, yawning excessive
Dutch overmatig geeuwen
French Baîllements excessifs, BAILLEMENTS EXCESSIFS
German uebermaessiges Gaehnen, GAEHNEN EXZESSIV
Italian Sbadiglio eccessivo
Portuguese Bocejar excessivo, BOCEJOS EXCESSIVOS
Spanish Bostezos excesivos, BOSTEZOS EXCESIVOS
Japanese あくび過多, アクビカタ
Czech Nadměrné zívání
Hungarian Túlzott mértékű ásítás