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What Is That Horrible Sound When You Crack Your Knuckles?

The article from IFLScience discusses the phenomenon of knuckle-cracking, a common habit that produces a distinctive sound. Contrary to popular belief, the sound does not come from bones grinding together or from gas bubbles collapsing within the synovial fluid of the joints. Instead, research has shown that the noise is produced when the joint is manipulated in a way that stretches the joint capsule, creating a sudden drop in pressure. This pressure drop causes dissolved gases in the synovial fluid to form bubbles, and the sound is the result of these bubbles rapidly forming or collapsing. Studies, including one using MRI scans, have confirmed that the cracking sound occurs when the joint space expands, not when it contracts, debunking the bubble-collapse theory. Furthermore, habitual knuckle-cracking does not lead to arthritis, although it might be associated with other joint issues like reduced grip strength over time.

Read the Full IFLScience Article at:
[ https://www.iflscience.com/what-is-that-horrible-sound-when-you-crack-your-knuckles-78157 ]