by Marcin Gornsiewicz, M.D.
Entwine your fingers together and then bend them back. Do you hear the popping sound? Chances are you do. We have all done and heard it before, and some kids do it all the time just for fun or to make their parents crazy. Knuckle cracking is a common habit. Where is the noise coming from? To understand it, you need to know a bit about joint anatomy. Read more →