What is YAWNING?

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

the act of pulling in a volume of air via the mouth which is much bigger than that inspired in typical respiration, serving to enhance oxygen that goes to the brain. Some findings imply that yawning is mediated by the same neurotransmitters inside the brain which impact feelings, disposition, hunger, etc.

YAWNING: "Candice was asked to leave class because she was yawning too often. "

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