Is It Okay To Crack Your Knuckles?

Is It Okay To Crack Your Knuckles?

How many times did you crack your knuckles while watching this?

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MUSIC
“Pizza Take”
Licensed via Warner Chappell Production Music Inc.

SFX provided by Audioblocks. 
(https://www.Audioblocks.com)

STILLS
Dr Donald Unger
Karen Quincy Loberg / vcstar.com

VIDEO
Real-time cine magnetic resonance imaging of the human metacarpalphalangeal joint undergoing traction. by Kawchuk et al. is licensed under a Creative Commons Attribution 4.0 International License.

Film Footage courtesy of Shutterstock, Inc.
Used with Permission

SOURCES
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0119470
http://mic.com/articles/115668/never-before-seen-gif-shows-what-really-happens-when-you-crack-your-knuckles
http://www.huffingtonpost.com/2015/04/15/cracking-your-knuckles_n_7074354.html
http://www.livescience.com/50495-knuckles-cracking-pop-explained.html

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