Yawning is deep, enduring breath a wide open mouth and a quick exhale. Yawning is not only in humans but also in other mammals, birds and reptiles. Yawn even children in the womb. In healthy people yawning occurs with fatigue, lack of sleep or drowsy when you are in a stuffy room.
Yawning is directly related to the needs of the brain. Him for normal operation requires a certain amount of oxygen. If the brain senses a lack of oxygen, it sends a signal about the body, which tends to quickly to compensate for the shortage of oxygen. And this is done through yawning.
During oscitations is unfolding spivshihsya alveoli in the lungs, increasing their surface. Long, deep breath and a fast exhale oxygen quickly gets to the brain. Often, strong yawn person stretches the whole body - it is also the result of an instinctive desire to eliminate local stagnation of blood and align improper distribution of blood. In the yawning involved the major systems of the body: muscle, vascular, skeletal, respiratory, and nervous. The muscles of the mouth, face, neck increases the speed of blood flow in the vessels of the head. This improves blood flow to brain cells, they are supplied with more nutrients, oxygen, and removes waste products, carbon dioxide.
Recently revealed. that's one reason why yawning is overheating brain. Yawning is a physiological adaptation for maximum cooling of the brain. If a person is exhausted and wants to sleep in such conditions increases the temperature of the brain and flowing through his blood. To remedy the situation, the brain sends the body the signal to yawn.
The feeling of sleepiness and boredom that people experience before you yawn, it is the result of lack of oxygen for the needs of the brain. Yawning is often associated with lack of sleep and boredom, but actually when you yawn additional air enriches the blood, making a person more cheerful - yawning helps the brain to Wake up!
It is necessary to activate the brain, increasing alertness explains why sometimes yawning overcome when we are nervous and excited. For example, people often yawn when looking for something exciting events. Yawning is often attacked by the athletes before competition or to students before the exam.
Experts advise not to restrain yourself when you want to yawn, because this reflex helps to relieve fatigue, mental strain, stress, refresh the air in the lungs. While yawning respiratory tract wide open, and the muscles relax. Yawning activates circulation, clarifies the mind, nourishes the brain cells and the body's energy, promotes activity of the lacrimal glands. Dry eyes moistened and I feel much better. Relax the muscles of the temples, face, neck, nape, shoulders, abdomen and diaphragm. Improves mood.
Interesting facts about yawning
- The usual yawn, the average time lasts 6 seconds.
- The man yawns every 68 seconds.
- Men and women yawn equally often, however, men rarely cover their mouth.
- If you look, you are unlikely to miss!
- Some animals yawn to show what they have big teeth.
- Yawn still need to be able to. Often after a bad blunder you have to set the jaw!
- People who are immune to the yawning, at the same time are more restrictive in character.