CMCgewricht

The CMC joint, or carpometacarpal joint, refers to the articulation between the carpal bones of the wrist and the metacarpal bones of the hand. There are five CMC joints in each hand, corresponding to each of the five digits. The CMC joint of the thumb, located between the trapezium carpal bone and the first metacarpal bone, is particularly important. This saddle-shaped joint allows for a wide range of motion, including flexion, extension, abduction, adduction, and opposition, which is crucial for grasping and manipulating objects. The other four CMC joints are formed between the distal row of carpal bones and the second through fifth metacarpals. These joints are generally less mobile than the thumb's CMC joint and are more constrained by the surrounding ligaments. Inflammation or degeneration of the CMC joints, particularly the thumb CMC joint, can lead to conditions like osteoarthritis, causing pain, stiffness, and reduced hand function. Treatment for CMC joint issues often involves pain management, physical therapy, and in severe cases, surgical intervention.