why do we yawn. explain it
Answers
Answer:
A yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the eardrums, followed by an exhalation of breath. Yawning most often occurs in adults immediately before and after sleep, during tedious activities and as a result of its contagious quality.
Yawning, would be an involuntary reflex (something we can't really control) to help us control our oxygen and carbon dioxide levels. Sounds good, but other studies have shown that breathing more oxygen does not decrease yawning. Likewise, breathing more carbon dioxide does not increase yawning. Hmmm. Now what?
Another theory is that yawning stretches the lungs and lung tissue. Stretching and yawning may be a way to flex muscles and joints, increase heart rate, and feel more awake.
Explanation:
Causes of Excessive Yawning
- drowsiness, tiredness, or fatigue.
- sleep disorders, such as sleep apnea or narcolepsy.
- side effects of medications that are used to treat depression or anxiety, such as selective serotonin reuptake inhibitors (SSRIs)
- bleeding in or around the heart.
The reason that it's hard to stifle a yawn — especially when someone nearby is doing it and you're trying hard not to — appears to reside in the area of the brain that's responsible for motor function, a new study from England finds.
why do we yawn when we see someone else yawning
Scientists refer to the urge to yawn when you see someone else doing it as contagious yawning. This is a type of "echophenomenon." In other words, it's an automatic imitation of another person, according to the study, published online today (Aug. 31) in the journal Current Biology. Other types of echophenomena include "echolalia" (imitation of someone's words) and "echopraxia" (imitation of someone's actions.
does yawning cool our brain
Yawning Cools Down The Brain, Study Finds. To most, yawning is a sign of sleepiness. ... The researchers concluded that warmer temperatures provide no relief for overheated brains, which, according to the thermoregulatory theory of yawning, stay cool via a heat exchange with the air drawn in during a yawn.
Answer:
Yawning helps to cool your brain down from that clotting. Another reason you may yawn is because the body wants to wake itself up. The motion helps stretch the lungs and their tissues, and it allows the body to flex its muscles and joints. It may also force blood toward your face and brain to increase alertness.
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