Why can we snap our fingers?

Question

anonymous · Answer

snap = The clicking sound some get when they press their knuckles.

anonymous · Answer

Here's something for a start: http://en.wikipedia.org/wiki/Cracking_joints Can anybody give something solid.

trancenova · Answer

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.

anonymous · Answer

the Synovial fluid cavitation is the reasoning i've heard of most when discussing with fellow physicians.

anonymous · Answer

snapping your fingers is a noise created by the impact of your finger against your skin. Cracking your knuckles is a bit more biological.

anonymous · Answer

We were told about tendons in medical school.