Do people yawn more when they are feeling understimulated? Is yawning related to muscle tone?

During a yawn, muscles around the airway are fully stretched, including chewing and swallowing muscles. ... Due to these strong repositioning muscle movements, ... The localized circulatory changes resulting from this action pattern have led researchers to hypothesize that yawns may function to cool the brain (Gallup and ... Yawning likely has a multifactorial purpose that includes increased vigilance, arousal when drowsiness occurs, social communication, and possibly ... Jun 6, 2023 ... Yawning may have social implications from our early evolution. So to summarize, there are more than one cause of yawning. The purpose of yawning ... Contagious yawning was used as a proxy for yawning in both these experiments for two reasons. Contagious yawning is indistinguishable from spontaneous yawning. Yawning excessively is a condition where a person yawns more often than normal. This condition is caused by various reasons, such as boredom, sleepiness, or ... There have been a variety of theories advanced about the purpose of yawning. Hippocrates suggested that yawning expelled “bad air”, replacing it with good, ... Jul 8, 2020 ... Because the act of yawn itself consists of a prominent respi- ratory pattern, the earliest reason proposed behind it was hypoxia. It has been ... Aug 4, 2023 ... Sleepiness and boredom are the most common causes of excessive or frequent yawning. Some people wonder if too much yawning is a sign of a lack of oxygen. Aug 17, 2017 ... ... as 200 yawns per day! Less innocently however than heat or medication induced yawns are yawns as a clinical symptom. The main reason we yawn ...