打喊露

打喊露（粵拼：daa2 haam3 lou6；英文：yawn），又叫放飛蚊，官話叫呵欠，加埋伸懶或者伸懶腰，係種反射動作，令人吸大啖空氣，然後呼返出來。伸懶亦都令肌肉緊張啲。呢種動作唔單只係人會做，好多動物都會做^[1]。人通常係喺攰同眼睏、或者悶嗰陣最易打喊露，而且會人傳人。

响廿一世紀初，打喊露同伸懶嘅進化成因未明。早期認爲打喊露進化出嚟係為咗要吸多啲氧氣，但研究結果係打喊露反而會令人吸少啲空氣，唔支撐句假說。家吓認爲，打喊露嘅存在原因係要刺激個人，等啲人精神啲，提高警覺。而人傳人可以令一班人提高警覺。

對於西方文化，打喊露太大聲係冇禮貌嘅。

傳染

淨係睇到第個人「打喊露」，好多人就會不自覺噉一齊打埋一份，呢種「傳染性」嘅行為並非只係喺人類身上出現，第啲有社會性嘅動物，好似係黑猩猩同獅子噉，都有類似嘅行為；事實上，好可能脊椎動物冚唪唥都會用「打喊露」嚟調節身體內部嘅運作^[2]。

打喊露嘅傳染有個體差異，有啲人好易受到傳染。有啲研究指，呢種差異可能源於同理心上嘅差異，不過呢種講法到咗 2022 年仲未有定論。

有研究者認為，傳染性喊露呢種行為可能已經進化到變成群體同步行為——「打喊露」成日硬係喺一日嘅某啲指定時間出現，絕大部份係喺重要活動之間嗰啲過渡時間發生嘅。有研究指，見到同伴打喊露會提升一隻動物嘅警覺性。

睇埋

文獻

Gallup, A.C. (2022). The causes and consequences of yawning in animal groups. Animal Behaviour, Vol 187, May 2022, p209-219. doi: 10.1016/j.anbehav.2022.03.011.
Gallup, A.C. & Meyers, K. (2022). Seeing others yawn selectively enhances vigilance: an eye‑tracking study of snake detection. Animal Cognition (2021) 24:583-592. doi: 10.1007/s10071-020-01462-4

攷

↑ Seuntjens, Wolter (2010), "The Hidden Sexuality of the Yawn and the Future of Chasmology", in Walusinski, O. (ed.), The Mystery of Yawning in Physiology and Disease, Frontiers of Neurology and Neuroscience, vol. 28, Basel: KARGER, pp. 55-62.
↑ Gallup, A.C. (2022). The causes and consequences of yawning in animal groups. Animal Behaviour, Vol 187, May 2022, p209-219. doi: 10.1016/j.anbehav.2022.03.011.

[1] Seuntjens, Wolter (2010), "The Hidden Sexuality of the Yawn and the Future of Chasmology", in Walusinski, O. (ed.), The Mystery of Yawning in Physiology and Disease, Frontiers of Neurology and Neuroscience, vol. 28, Basel: KARGER, pp. 55-62.

[2] Gallup, A.C. (2022). The causes and consequences of yawning in animal groups. Animal Behaviour, Vol 187, May 2022, p209-219. doi: 10.1016/j.anbehav.2022.03.011.

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