Wrist joint

The radiocarpal joint , articulatio radiocarpea, is formed by the carpal joint surface of the radius and the distal surface of the articular disc, representing a slightly concave articular surface that joins the convex proximal articular surface of the wrist bones: navicular, semilunar, trihedral.

The joint capsule is thin, attached to the edge of the articular surfaces of the bones forming this joint.

The joint is strengthened by the following ligaments:

1. Radial collateral ligament of the wrist, lig. Collaterale capri radiale, stretched between the lateral styloid process and the scaphoid bone. Some of the bundles of this ligament reach the bone-trapezium. The ligament brakes the reduction of the brush.

2. Elbow collateral ligament of the wrist, lig. Collaterale capri ulnare, starts from the medial styloid process and is attached to the trihedral bone and partially
To the pea-bones. The ligament brakes the retraction of the brush.
3. Palmar laparose ligament, lig. Ulno sapreum palmare, begins from the articular disk and the styloid process of the ulna and, going down and inside, is attached to the semilunar, trihedral and cephalic bones. The ligament strengthens not only the arm wrist joint, but also the mid-wrist joint.

4. Back wrist band, lig. Radiolasspreum dorsale, comes from the rear surface of the distal end of the radial bone in the direction of the wrist, where it attaches to the rear of the scaphoid, half moon and trihedral bones. The binder brakes the bending of the brush.

5. The palm radiocarpal ligament, lig. Radiocarpeum palmare, starts from the base of the lateral styloid process of the radius and the carpal margin of the articular surface of the same bone, goes downward and medially, attaching to the bones of the first and second rows of the wrist: scaphoid, semilunar, trihedral and capitate. Bundle inhibits extension of the hand.

In addition to these ligaments, there are interosseous intercostal ligaments, iigg. Intercarore interossea, connecting the bones of the proximal wrist; The individual bones of the wrist are articulated together, forming inter-articular joints, articulationes intercarpeae.

The radiating joint is a kind of biaxial joints - an ellipsoidal joint. In this joint, the following movements are possible: flexion, extension, reduction, retraction, and circular motions.