Finger Crack the stock mystery solved – Helsingborgs Dagblad

Try Personal became Jerome Fryer, appropriately enough chiropractor by profession, with a pronounced ability to “crack” each finger on both hands.

It turned out that each finger buckling resulted in a gas-filled cavity formed in less than 310 milliseconds inside the finger joint.

– When the joint surfaces are separated, there is no more joint fluid that can fill the void, whereupon a cavity occurs, and that is when it is formed as where the sound is coming, says Greg Kawchuk.

According to the researchers found no evidence that the “finger-crunching” is harmful. On the contrary. It may well be that this ability is a sign of healthy joints, say the researchers in PLoS One.