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Increased yawning

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Yawning is involuntary opening of the mouth with respiration, breathing first inward, then outward. It is often caused by the power of suggestion. Arousal, attention, personality and intelligence could all be influencing factors  in susceptibility to contagious yawning. A number of studies found that yawns on video played to a classroom for five minutes would induce a responsive yawn in 55% of the audience, but neither videos nor words will work in children below the age of six years. The greater sensitivity to ‘psychological’ yawn stimuli might reflect enhanced self- and social awareness, related to reading ability. It could be mediated by specific brain cells called “mirror neurons” that allow to learn and empathize

if yawning is accompanied by other common anxiety symptoms, it may be due to an anxiety disorder. It is also associated with tiredness, sleepiness, stress and hunger. According to one theory, bored or tired individuals don't breathe as deeply as usual, taking in less oxygen and yawning helps to compensate for it.

Excessive yawning is yawning that occurs frequently (1 to 4 yawns per minute over an extended period of time), sometimes without any apparent reason. Increased yawning often precedes seizures and migraine headaches, in people with epilepsy and migraines. Yawning excessively may also occur in the presence of a heart defect or disease. 

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