Zijevanje
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Zijevanje je refleks simultanog udisaja zraka i širenja bubnjića praćeno izdisajem.
Zijevanje je povezano sa umorom, stresom, pretjeranim radom, nedostatkom stimulacije ili dosadom. Postoji nekoliko teorija šta uzrokuje zijevanje. Najčešće zijevanje se povezuje sa nedostatkom kisika, ali nije naučno dokazano jer zijevanjem se unosi manja količina kisika nego običnim disanjem.[1]
Psiholozi koji su pratili 44 ispitanika su zaključili kako zijevanje omogućuje hladnom zraku da dopre do mozga, pomažući mu tako da ostane u "stanju pripravnosti".[2]
Reference
- ^ http://www.americanscientist.org/template/AssetDetail/assetid/47361
- ^ "Arhivirana kopija". Arhivirano s originala, 27. 3. 2009. Pristupljeno 4. 3. 2009.CS1 održavanje: arhivirana kopija u naslovu (link)
Vanjski linkovi
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