A study conducted by Alessia Leone and her team suggests there are different types of yawns to convey different information e. Leone's research involved a type of monkey called a gelada, but it's possible human yawns also vary according to their function.
It's clear yawning is caused by physiological factors. Fluctuations in neurotransmitter levels trigger a yawn. The biological benefits of yawning are clear in some other species, but not so obvious in humans.
At a minimum, yawning briefly increases alertness. In animals, the social aspect of yawning is well-documented. While yawning is contagious in humans, researchers have yet to determine whether the psychology of yawning is a leftover from human evolution or whether it still serves a psychological function today.
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Measure content performance. Develop and improve products. List of Partners vendors. Share Flipboard Email. Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels. Facebook Facebook Twitter Twitter. Updated March 25, A yawn is a reflex in response to sleepiness, stress, boredom, or seeing another person yawn.
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Health Conditions Discover Plan Connect. Medically reviewed by Cameron White, M. Is yawning contagious? Ways to stop yawning. Read this next. Medically reviewed by Deborah Weatherspoon, Ph. Jaw Popping. We find someone close to us yawning and then we join in.
Not because it feels good or because we want to. Countless researchers and scientists over the years have attempted to unravel this mystery. But no one has really been able to decode this subject comprehensively. Usually, it is assumed that humans yawn when they are tired or are bored. Yawning is automatic as its roots are in the brainstem. There are multiple triggers that can cause yawning — apart from boredom and sleepiness, temperature too can cause yawning. Contagious yawning can occur in humans as a result of hearing, seeing, or even thinking about yawning.
Do you feel like yawning even as you read this? Pause and think for a second. And read that line about yawning again. You are likely to feel that urge to yawn and may well end up yawning too. Chimpanzees, humans, baboons, bonobos, wolves, and, even dogs, are known to be affected by contagious yawning.
But while we have ascertained that contagious yawning is a phenomenon do we have any answers to why do we yawn when someone else does?
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