2024年3月15日 · Yawning is a common reflex in which you open your jaw wide, take a deep breath, and then quickly breathe out. It lasts about 4-7 seconds and often happens when you're waking up or falling asleep....

2025年2月26日 · Yawning is a mostly involuntary process of opening the mouth, breathing in deeply, and filling the lungs with air. While there’s no precise cause of yawning, it’s often viewed as a natural...

2023年10月16日 · Yawning is the opening of your airway and mouth to take a long, deep breath of air. It’s a complex muscular movement. In seconds, your entire airway fully dilates (expands). And surrounding muscles powerfully stretch or tense, most significantly around your throat (pharynx). Another term for yawning is oscitation.

2022年12月5日 · Yawning, the involuntary act of opening your mouth, taking a deep breath, and exhaling, is the body's natural response to being tired or bored. But yawning that happens excessively (or more often than usual) could indicate an underlying health issue. This article discusses the potential causes behind yawning more than usual.

A yawn is a reflex in vertebrate animals characterized by a long inspiratory phase with gradual mouth gaping, followed by a brief climax (or acme) with muscle stretching, and a rapid expiratory phase with muscle relaxation, which typically lasts a few seconds. [2][3] For fish and birds, this is described as gradual mouth gaping, staying open for...

Yawning is associated with some hormones that are released that briefly increase the heart rate and alertness. So actually the reason that one yawns when tired or bored is the body’s attempt to keep you alert and awake — if only for a brief time.

2024年10月21日 · Everybody yawns, but why? Discover the possible reasons for yawning, why it seems to be so contagious, and if it can ever pose a risk to health.

2023年10月4日 · Excessive yawning may be due to an underlying medical condition, such as sleep issues, stress, or others. Less often, it may be a sign of a more serious medical condition, such as MS or liver...

2022年7月17日 · Yawning is an easy and intuitive way to stretch your face. If you’ve been doing a lot of talking, chewing, or shouting, you may have irritated the muscles around your mouth or neck. Yawning is a reflexive way to stretch these muscles. The yawning should go away if you relax for a bit and don’t talk.

2023年12月22日 · Yawning is a natural involuntary response to feeling tired or bored. Yawns can also be “contagious.” We yawn when we see, hear, or even think about yawns. However, if you find yourself constantly yawning, it may be a symptom of a sleep disorder or other medical concern. People who yawn excessively tend to have an underlying issue causing the yawns.