Crepitus Definition

Crepitus is the grinding, crackling, or grating sensation in a joint, commonly accompanied by a cracking sound. Even if the sound is muffled or absent completely, the grinding sensation can be felt. The degeneration of a joint’s cushioning due to arthritis causes the bones to contact each other more and, as such, crepitus is a prominent symptom of osteoarthritis. The joint grinding sensation of crepitus is not a definitive diagnosis of arthritis or joint degeneration, and is only considered significant if it is accompanied by pain or if it affects the joint’s mobility.

Highlighting the space between two vertebra where pressure can build and then pop.