Weather of Arabia - A recent study suggests that yawning may be a natural way to regulate brain temperature, as researchers monitored the frequency of yawning for 80 people in the winter and 80 others in the summer and found differences between the two seasons.
Yawning is considered contagious. After showing a picture of people yawning, nearly half of the participants yawned when they were outdoors in the winter, compared to less than a quarter of people when they were outdoors in the summer.
The results showed that people yawn less when the temperature in the atmosphere (outside the body) is higher than the body temperature , which is what happens in the summer , which suggests that yawning is the natural way to refresh the brain.
These results provide support for the expression of how yawning is associated with physiology and thermoregulation, since for short periods of time researchers did not know the biological function of yawning.
The theory of yawning for brain resuscitation or thermoregulation in the brain suggests that yawning increases when the brain temperature rises. Therefore, the physiological effects of yawning are to enhance brain resuscitation and cooling, by deep inhaling cold air and increasing blood flow to the brain due to jaw expansion.