Is yawning linked to the circadian rhythm? Can yawning be a sign of anxiety?

There have been a variety of theories advanced about the purpose of yawning. Hippocrates suggested that yawning expelled “bad air”, replacing it with good, ... Feb 22, 2019 ... Reading about yawning makes people yawn. You are probably yawning right now ... Is there a purpose to a yawn? I know it means you're sleepy, but ... One school of thought is that yawning occurs when CO2 levels in the blood are high, and Oxygen levels are low. The yawn acts as a boost to the O2 levels. The ... Yawning is the body's response to fatigue, but excessive yawning could indicate a sleep disorder or another health condition. Jun 23, 2015 ... ... cause the activity changes, or do those activity changes cause the yawning? Also, what physiological purpose does yawning actually serve in ... Sep 19, 2011 ... ... yawning, and there is still no consensus about its purpose among the dozen or so researchers studying the topic today. “Enter the brain ... Jan 10, 2024 ... Yawning frequently or excessively is a common symptom of anxiety disorder. While the reason why we yawn is unknown, anxiety can cause yawning. Contagious yawning was used as a proxy for yawning in both these experiments for two reasons. Contagious yawning is indistinguishable from spontaneous yawning. Oct 1, 2023 ... While the exact cause can vary, one common explanation is the temporary misalignment of the jaw joints when the mouth opens wide during a yawn. During a yawn, muscles around the airway are fully stretched, including chewing and swallowing muscles. ... Due to these strong repositioning muscle movements, ...