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Clinical Chiropractic: The Wrist and Hand

Chiro.Org Blog: Clinically, the most important articulation in the elbow is formed by the proximal ulna and the distal radius forms the most important articulation in the wrist. The carpals articulate with the ulna only during extreme wrist adduction. The distal row of carpals forms a complex joint with the proximal row. Because they are loosely connected, the navicular and trapezium spread during wrist abduction and approximate during adduction. The proximal carpals rock and glide toward the ulna during wrist abduction and toward the radius during adduction. Adduction is slightly greater in pronation because the styloid pro cess of the ulna restricts motion when the hand is supinated. During adduc tion, the styloid swings backward out of the way. As the A-P curve of the proximal carpals is more acute than the transverse curve, greater excursion is allowed in wrist flexion and extension than in lateral motion. The more deli cate the patient’s bone structure, the greater the mobility. […]