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Various silly groups of people go to sleep together, such as a "Hinkle Horn Honking Club". Various creatures go to sleep too, such as a Collapsible Frink and the Chippendale Mupp. The narrator explains that they count the number of people and creatures asleep using an "Audio Telly O-Tally O-Count" which spies on people to know when they went to ...
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.
Merely thinking about or seeing someone yawning can make you yawn. But why?
Whether you’re tired, bored, or see someone else do it, we all yawn. But the yawning when you’re tired scenario makes sense. ... The same imitation phenomenon is also seen in people with ...
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.
One of the important questions in sleep research is clearly defining the sleep state. This problem arises because sleep was traditionally defined as a state of consciousness and not as a physiological state, [14] [15] thus there was no clear definition of what minimum set of events constitute sleep and distinguish it from other states of partial or no consciousness.
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 ...
NREM sleep consists of sleep stages 1–4, and is where movement can be observed. A person can still move their body when they are in NREM sleep. If someone sleeping turns, tosses, or rolls over, this indicates that they are in NREM sleep. REM sleep is characterized by the lack of muscle activity.