Yawn
Appearance
Yawn | |
---|---|
Joseph Ducreux pandiculatin (baith yawnin an stretchin); sel-portrait c. 1783 | |
Organisms | Vertebrates |
Biological seestem | Nervish seestem |
Heal | Unaffectit or benefeecial |
Action | Involuntar |
Stimuli | Fatigue Boredom Stress Sleepiness Ithers mirror neuron reflex |
Method | Complete extension o jaw, inhalation, een close, stretchin o he eardrum, exhalation |
Duration | 8 seiconts |
A yawn is a reflex conseestin o the simultaneous inhalation o air an the stretchin o the eardrums, follaed bi an exhalation o braith.