How does yawning affect breathing

As this theory goes, our bodies take in less oxygen because our breathing has slowed. Therefore, yawning helps us bring more oxygen into the blood and move more carbon dioxide out of the blood. Yawning, then, 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.

There is generally a feeling of relaxation immediately after the yawn. Answering this question is not nearly as easy as defining the action. There are a number of theories about why we yawn, but remarkably little good research on this topic. There are several agreed upon causes for yawning, however. First, it that when changing elevation rapidly as in an airplane, you will both voluntarily on purpose yawn and also involuntarily not on purpose yawn to try and equalize pressures within your ear.

This works and is an accepted reason for yawning. Another indisputable cause of yawning is called social empathy. In fact psychologists have proven that the more empathetic you are, the more likely you are to yawn when someone else does. Although not fully understood, yawning appears to be not only a sign of tiredness but also a much more general sign of changing conditions within the body.

Studies have shown that we yawn when we are fatigued, as well as when we are awakening, and during other times when the state of alertness is changing. You are correct in thinking that yawns are catching. Seeing, hearing or thinking about yawning can trigger the event, but there is little understanding of why it is contagious.

A number of theories regarding the genesis of yawning have been presented over the years. Some evidence suggests that yawning is a means of communicating changing environmental or internal body conditions to others. If so, then its contagious nature is most likely a means of communication within groups of animals, possibly as a means to synchronize behavior.

If this is the case, yawning in humans is most likely vestigial and an evolutionarily ancient mechanism that has lost its significance. Yawning is a stereotypical reflex characterized by a single deep inhalation with the mouth open and stretching of muscles of the jaw and trunk. It occurs in many animals, including humans, and involves interactions between the unconscious brain and the body, though the mechanism remains unclear. As for the etiology of yawning, for many years it was thought that yawns served to bring in more air because low oxygen levels were sensed in the lungs.

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