The metacarpophalangeal joints are better known as your what?
The metacarpophalangeal joints are the large knuckles of the hand, where the fingers and thumb meet the palm. There are five separate metacarpophalangeal joints that connect each metacarpal bone to the corresponding proximal phalanx of each finger. This joint is commonly injured in closed-fist activities and is often known as a boxer's fracture. The primary movements of the metacarpophalangeal joints are flexion, extension, adduction, abduction, and circumduction. Studies show that as many as 54 percent of people crack their knuckles.
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