In the field of medicine, specifically anatomy, the joint that connects the ulna and radius to the carpus is known as the wrist. If studied as a whole and not separately, it could be said that it is a condylar joint, this is because it allows movements to be carried out in a transverse axis and in an anteroposterior axis. Carry out flexion and extension movements on the first axis, and radial or ulnar tilt movements on the secondary axis. From the sum of the movements with respect to said axes, the circumduction can be performed. It should be noted that rotation is not possible. The factBecause this structure can carry out multiple movements, it allows the hand to choose different positions and shapes in order to carry out its function as a tool. If you want to know the concept of doll (Toy) enter here
Its structural characteristics give the possibility of carrying out various complex movements. Allowing the movement of the hand in different planes of space. Some consider that the wrist joint is the most complex of all the joints in the body. It includes a complex network of musculotendinous units, made up of muscles and tendons, which make movement possible and give it strength. Not to mention, they also control the carpal bones.
Like other complex structures of the body, the wrist joint is made up of several joints, among which the radiocarpal joint, the external joint of the distal chamber of the wrist, and finally the internal joint of the chamber can be highlighted. distal of the wrist.
In the case of the radiocarpal joint. Its upper part is made up of the radius and added to it an articular disc that is between the carpus and the ulna, while in the lower part, it is composed of the scaphoid, the lunate and the pyramidal. The external articulation of the distal chamber, for its part, has the surface of the scaphoid in the upper area and in its lower region those of the trapezium and trapezoid. Finally, the internal joint of the distal chamber. In the upper portion it has the surface of the scaphoid, lunate, pyramidal and pisiform. While in its lower portion it has large and hamate bones.
