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.

Dec 12, 2024 · Yawning is the involuntary action that makes our jaw go wide and the exhalation of the deep breath we take in while our mouth is open. Yawns are more likely to occur in moments of tediousness or drowsiness. If you see, hear, think about, or even read about it, it …

Mar 15, 2024 · 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....

Oct 16, 2023 · Yawning is a common but perplexing human function. Scientists have several theories for why we yawn, but none of them are certain. Common triggers of yawning include tiredness, boredom, waking up and stress. Seeing or hearing other people yawn can also cause you to yawn. What is yawning?

Dec 5, 2022 · Excessive yawning can result from a sleep disorder, the use of certain medications, and (less commonly) the symptom of a neurological or other condition. Check with a healthcare provider if you notice you're yawning more than usual.

Feb 26, 2025 · Although excessive yawning is usually attributed to being sleepy or bored, it may be a symptom of an underlying medical problem. Learn about the possible causes and treatments.

Apr 25, 2023 · Yawning is an involuntary opening of the mouth to take a deep breath. We likely yawn to help regulate our brain’s temperature and yes, yawns can be contagious.

Jul 21, 2017 · People have been seen to yawn when doing something dangerous like jumping out of a plane, and rats yawn when put in a new environment. One study found yawning has a similar impact on the...

5 hours ago · Excessive yawning and nodding off in dull work meetings at work can be serious signs of sleepiness, experts say. Basak Gurbuz Derma/Moment RF/Getty Images ... Man in bed in the morning.

Mar 25, 2019 · In humans, yawning appears to be caused by both physiological and psychological factors. Key Takeaways: Why Do We Yawn? A yawn is a reflex in response to sleepiness, stress, boredom, or seeing another person yawn. The process of yawning (called oscitation) involves inhaling air, stretching the jaw and eardrums, and then exhaling.