Why can we snap our fingers?
snap = The clicking sound some get when they press their knuckles.
Here's something for a start: http://en.wikipedia.org/wiki/Cracking_joints Can anybody give something solid.
Well the 'Synovial fluid cavitation' part on the wiki link you gave seems to have a good reference. I'm pretty sure I've heard that reason elsewhere aswell.
the Synovial fluid cavitation is the reasoning i've heard of most when discussing with fellow physicians.
snapping your fingers is a noise created by the impact of your finger against your skin. Cracking your knuckles is a bit more biological.
We were told about tendons in medical school.
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