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In a new study, researchers from the University of Nottingham looked at the brain to determine what makes yawning contagious.
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 ...
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.
In one study, about 30% of people who had PTSD (post-traumatic stress disorder) talk in their sleep. [4] A 1990 study showed that Vietnam War veterans having PTSD report talking more in their sleep than do people without PTSD. [5] Sleep-talking can also be caused by depression, sleep deprivation, day-time drowsiness, alcohol, and fever.
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 ...
As a result, sexual content has increased in K-pop music videos. [7] A video content analysis by Bohye Song of MelOn Hot 100 chart listings of the most popular Korean music videos of 2004, 2005, 2014, and 2015 analyzed their sexual content and increases over time. [7] Content observed were sexual innuendos, sexual acts, and provocative clothing.
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