Definition of yawning
Stoning is an involuntary process carried out by the human being and the animal. Even the child in his mother’s womb is wheezing even though he does not breathe through the lungs. The aim of yawning is to fill the lungs with air as much as possible. When yawning, the person opens his mouth Where the size of the pharynx is four times greater than the normal size at normal times, and the duration of yawning is six seconds and in these six seconds contractions of the muscles of the neck and face with the closure of the eyes when yawning, and yawning to open the channel Ostacious between the ear Left and pharynx.
It must be noted that when yawning depends on all the sensory information for a period of time is the period that a person needs to yawn and isolate the person from his world for a certain period depending on the duration of yawning.
Causes of yawn
- When feeling sleepy.
- When feeling tired and bored.
- The yawning person yawns to alert him and make him alert because when yawning the muscles of the face contract, leading to blood rush more force to the brain and that when moving the jaw wake up senses.
- The person is wheezing when the oxygen level is lower than the body’s normal rate and the body’s carbon dioxide is high.
- When you want to change a theme or escape from a particular subject.
- A reflex reaction that works to protect the lung from degeneration.
- Increase the activity of the body instead of idle and indicates the conflict between self and sleep on the one hand and between the body and his need to sleep on the other.
- Remove the contaminated air from the lungs.
- Re-flow blood to the brain.
- When you feel hungry.
- When sleep time approaches.
- When relaxing and relaxing.
- When feeling tired and unable to do extra effort.
- When waking up from sleep.
- When feeling anxious and tense.
The process of yawning is a very useful process for the body because it works to replenish the air, and improve the level and quantity of oxygen and carbon dioxide in the body, works to expand the lungs, and work to increase the effectiveness of joints, muscles and heart, gives the body activity and a sense of vigilance, and yawning helps to brain on Confronting changing attitudes.
Yawning is considered to be a process of transmission from one person to another through infection. It is enough for one person to yawn to spread yawning among others. It is enough for a person to think about yawning or reading about it until it starts to yawn.