why do we yawn ?

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https://www.webmd.com › sleep-disorders › what-to-know-about-yawning

https://www.webmd.com › sleep-disorders › what-to-know-about-yawning
What Causes Yawning? Why It Happens and What You Can Do About It – WebMD
Change in elevation. If you’re in an airplane or driving in different elevations, you might yawn on purpose or as an automatic response from your body. This is your body equalizing the pressure…

https://www.newscientist.com › question › why-do-we-yawn

https://www.newscientist.com › question › why-do-we-yawn
Why do we yawn? | New Scientist
Humans Mathematics Chemistry Subscribe now Why do we yawn? Cavan Images / Alamy Many animals yawn but we are not entirely sure why. Perhaps it makes us more alert, reduces anxiety, or cools…

https://www.sleepfoundation.org › sleep-faqs › why-do-you-yawn

https://www.sleepfoundation.org › sleep-faqs › why-do-you-yawn
Why Do We Yawn? | Sleep Foundation
11 oct. 2023Yawning may aid in brain thermoregulation by increasing blood flow to the head. The contagiousness of yawning suggests it may be an empathetic response and social behavior. Excessive yawning may be a sign of underlying health conditions, so consult with your doctor about any feelings of sleepiness.

https://www.healthline.com › health › why-do-we-yawn

https://www.healthline.com › health › why-do-we-yawn
Why Do We Yawn and Is It Contagious? – Healthline
One popular theory is that yawning helps your body bring in more oxygen. But this theory has been mostly debunked. Keep reading to see what current research suggests yawning says about you,…

https://www.sleepfoundation.org › physical-health › excessive-yawning

https://www.sleepfoundation.org › physical-health › excessive-yawning
Causes of Excessive Yawning | Sleep Foundation
18 avr. 2022Scientists have identified a number of possible reasons that we yawn: Sleepiness or Drowsiness: We commonly yawn when we’re drowsy or excessively sleepy. Yawning occurs both after waking up and before bedtime. Yawns are part of your body’s process of staying awake. The stretching you do when you also helps prevent you from falling asleep.

https://en.wikipedia.org › wiki › Yawn

https://en.wikipedia.org › wiki › Yawn
Yawn – Wikipedia
A yawn is a reflex characterized by a long inspiratory phase with gradual mouth gaping, followed by a brief climax (or acme) with muscle stretching, and a rapid expiratory phase with muscle relaxation, which typically lasts a few seconds. For fish and birds, this is described as gradual mouth gaping, staying open for at least 3 seconds and subsequently a rapid closure of the mouth.

https://www.verywellhealth.com › why-do-we-yawn-7966527

https://www.verywellhealth.com › why-do-we-yawn-7966527
Reasons We Yawn: Why Is This Reflex Contagious? – Verywell Health
10 oct. 2023Respiration Yawning may have something to do with a lack of oxygen. Hypoxia (lack of oxygen) is one of the oldest theories as to why we yawn and dates back to 1755. This theory suggests that yawning is triggered when blood or brain oxygen is insufficient.

https://www.houstonmethodist.org › blog › articles › 2021 › feb › why-do-we-yawn-and-are-yawns-really-contagious

https://www.houstonmethodist.org › blog › articles › 2021 › feb › why-do-we-yawn-and-are-yawns-really-contagious
Why Do We Yawn & Are Yawns Really Contagious?
The overarching theory is that — given that the air around you is of optimal temperature — yawning can serve to help cool your brain. If true, this concept would provide physiological relevance to yawning. Cooling your brain via yawning could possibly help ensure optimal cognitive performance.

https://health.clevelandclinic.org › why-do-you-yawn-and-is-it-contagious

https://health.clevelandclinic.org › why-do-you-yawn-and-is-it-contagious
Why Do We Yawn and Is it Contagious? – Cleveland Clinic
25 avr. 2023Theory 1: It’s your brain’s way of waking you up It’s no coincidence that you frequently yawn when you feel your eyelids droop and you start daydreaming about your warm bed. In fact, a yawn might be your brain attempting to jolt you awake when you’re sleepy.

https://www.verywellhealth.com › why-we-yawn-4155112

https://www.verywellhealth.com › why-we-yawn-4155112
Why Do We Yawn and Is It Contagious? – Verywell Health
3 août 2022Yawning most likely occurs because you’re feeling drowsy. Decreased arousal: Research has also suggested that you’re more likely to yawn when you are in a less stimulating environment (i.e. you’re bored). lesoutrali bot