Joints of the forearm
In the elbow joint, the three compartments each form a joint, so that the elbow joint consists of three partial joints. The humerus is connected to both the ulna and the radius (Articulatio radioulnaris proximalis). The distal ulna-spoke joint (Articulatio radioulnaris distalis) also allows the spoke to rotate around the ulna and thus the palm of the hand to move up (supination) and down (pronation). In addition, the ulna and radius with the adjacent proximal carpal bones form the proximal wrist. This enables the
- Distal end of the humerus, and the
- The proximal ends of ulna and radius are joined together in an articulated joint.
- Elle (Articulatio humeroulnaris) and with the
- Spoke (Articulatio humeroradialis) in articulated connection.
- Diffraction (flexion) and
- Stretching (extension) and the
- Rotation of the forearm or palm upwards (supination) and downwards (pronation) possible.
- Diffraction (flexion) and
- Stretching (extension), and the
- Spreading to the ulna (ulnar abduction) and to the radius (radial abduction).
Vessels of the forearm
Arteries The forearm receives its supply mainly from the large arm artery (brachial artery) coming from the upper arm. In the crook of the arm, this artery splits into numerous smaller and larger branches, which then supply the forearm and the muscles and finally flow into the vascular network of the hand. Veins The deep large veins run along with the arteries and are also named like them.
Furthermore, the large superficial veins are the Vena intermedia antebrachii. It runs relatively centrally on the front of the forearm. In the crook of the elbow there is a connection between the intermedia antebrachii and the forearm. Since it is easily visible and palpable from the outside, it is often used for intravenous injections or for taking blood samples.
- Side (radial artery) and the
- Side of the ulna (Arteria ulnaris).
- The vena cephalica on the spoke side and the
- On the elbow side the vena basilica is visible as superficial veins.
- Outer vena cephalic vein and the
- Internal basilica vein.