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5 Weird Involuntary Behaviors Explained!

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Published on Jan 26, 2015

Yawns, hiccups, twitchy eyes (and more) explained!
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Our bodies do a lot of weird things, and many of them are completely involuntary. Why do we often jerk our bodies awake right before falling asleep? Why do we yawn? Why do we hiccup? Why do some people sneeze when they look at the sun? And why does your eye twitch? This week we’ll look at the science behind these crazy involuntary behaviors!

MY T-SHIRT: http://www.cognitive-surplus.com/prod...

Read more:

Aristotle’s “Book of Problems” free online: http://www.gutenberg.org/files/12699/...
(it was probably not written by Aristotle, but instead collected after his death)

Yawns: http://www.bbc.com/future/story/20140...

Eye twitches: http://www.straightdope.com/columns/r...

Sun sneezes: http://www.ncbi.nlm.nih.gov/pmc/artic...

Hiccups: http://www.bbc.com/future/story/20140...

Sleep twitches: http://www.bbc.com/future/story/20120...
http://www.bbc.com/future/story/20120...

Post-micturition convulsion syndrome: http://io9.com/5810102/the-science-of...

Have an idea for an episode or an amazing science question you want answered? Leave a comment below!

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It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D.
Follow me on Twitter: @jtotheizzoe
Email me: itsokaytobesmart AT gmail DOT com
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For more awesome science, check out: http://www.itsokaytobesmart.com
Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigita...

Joe Hanson - Creator/Host/Writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen Inc.
Kate Eads - Associate Producer
Andrew Matthews - Editing/Motion Graphics
Katie Graham - Director of Photography
John Knudsen - Gaffer
Dalton Allen - Post-Production Intern

Theme music:
“Ouroboros” by Kevin MacLeod

Other music via APM

Stock images from Shutterstock

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Last week’s video:
There’s no such thing as cold: https://www.youtube.com/watch?v=Akd7M...

More videos:
Why Are Some People Left-Handed? https://www.youtube.com/watch?v=NPvMU...
Why Did We Blow on NES Games? https://www.youtube.com/watch?v=4Gf9m...
The Science of Game of Thrones - https://www.youtube.com/watch?v=Utu-L...
There Was No First Human - https://www.youtube.com/watch?v=xdWLh...
How The Elements Got Their Names - https://www.youtube.com/watch?v=mtg9p...

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