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Most people yawn because they’re tired, but it can also happen unexpectedly and without any triggers. While yawning is typically harmless and only lasts about five to 10 seconds, when it occurs ...
In a new study, researchers from the University of Nottingham looked at the brain to determine what makes yawning contagious.
But there's a window: People yawn most when it's around 68 degrees. When it's really hot outside, people are less likely to yawn because it would have very little impact on the brain's temperature.
Snakes yawn, both to realign their jaws after a meal and for respiratory reasons, as their trachea can be seen to expand when they do this. Dogs, and occasionally cats, often yawn after seeing people yawn [11] [65] and when they feel uncertain. [66] Dogs demonstrate contagious yawning when exposed to human yawning.
Narcolepsy is a chronic neurological disorder that impairs the ability to regulate sleep–wake cycles, and specifically impacts REM (rapid eye movement) sleep. [1] The pentad symptoms of narcolepsy include excessive daytime sleepiness (EDS), sleep-related hallucinations, sleep paralysis, disturbed nocturnal sleep (DNS), and cataplexy. [1]
Consequently, results have shown that those who sleep less do poorly. In the United States, sleep deprivation is common with students because almost all schools begin early in the morning and many of these students either choose to stay awake late into the night or cannot do otherwise due to delayed sleep phase syndrome. [22]
This explains why people with medical conditions that cause an increased core body temperature like multiple sclerosis (MS), epilepsy, anxiety, and head trauma experience excessive yawning ...
Children's literature portal; Dr. Seuss's Sleep Book, also known as The Sleep Book, [1] is an American children's book written by Dr. Seuss in 1962. The story centers on the activity of sleep as readers follow the journey of many different characters preparing to slip into a deep slumber. [2]