Yawning...?!
Question: Everybody always says you yawn when you're tired. My friend told me it's because you're not getting enough oxygen to your brain. Is this true? And if so, why and what makes them "contagious"?
Answers: Everybody always says you yawn when you're tired. My friend told me it's because you're not getting enough oxygen to your brain. Is this true? And if so, why and what makes them "contagious"?
Why Do We Yawn:
http://faculty.washington.edu/chudler/ya...
Why is yawning contagious:
http://www.world-science.net/exclusives/...
isnt it both? I heard the oxygen fact but dont think its because of lack of oxygen to your brain but a lack of oxygen in general. Also, I think that because it feels good to yawn, we do it when we see others do it.