Genotypic dependency of spontaneous yawning frequency in the rat.

doi:10.1016/0166-4328(90)90039-h

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Article

Genotypic dependency of spontaneous yawning frequency in the rat.

Behavioural brain research - 30 Oct 1990

Urbá-Holmgren R, Trucios N, Holmgren B, Eguibar J R, Gavito A, Cruz G, Santos A

Abstract excerpt

By inbreeding we have obtained two sublines of Sprague-Dawley rats which differ significantly in spontaneous mean yawning frequency (MYF). In generation F21 of the high-yawning (HY) subline MYF was 21.5 yawns/h (y/h) in males and 1.95 y/h in females, at the age of 2 months. In the low-yawning (LY...

Topics

Age Factors
Animals
Crosses, Genetic
Genotype
Rats
Rats, Inbred Strains
Yawning

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