By means of some articular surfaces, a connection is made with the humerus. Others are designed for articulation with segments of the wrist.
The elbow and radius bone on their length have a triangular shape. There are three edges and three surfaces. One surface is directed forward, the other is facing back. The third - the ulnar bone - inside, and the ray - outside.
Of all three edges sharp one. It divides the posterior and anterior surfaces, facing the adjacent bone, limiting the space between the bones. In this connection, it has one more name - the interosseous region.
It should be noted that the components of the skeleton of the forearm, in addition to common features, have distinctive features.
Thus, the radius is located on the outside of the forearm. The lower epiphysis of this segment is more massive. At the top end is the head of the bone. There is a small depression in it. The head edge has an articular circumference.
Just below the head is the neck. The radial bone is also endowed with a special tuberosity, the place of attachment of the biceps brachial muscle.
The radius of the radialis differs somewhat by its widened lower end. On the inside there is a tenderloin. It comes in the ulna.
On the opposite side there is a styloid process, going downwards. The lower surface has a concave carpal articular surface. With the help of the ledge, it is divided into two sections for the semilunar and scaphoid bone.
Fracture of the radius with displacement is characterized by some shortening of the forearm. The patient supports the injured limb with a healthy arm. Mobility of the fragments provokes a sharp pain at the moment of palpation of the site, lateral compression of the forearm site removed from the injury site and under the axial load.