The articulation between the radius and the ulna at the elbow is known as the proximal radioulnar joint.ĭistally, it articulates with the ulna again at the distal radioulnar joint. Proximally, the head of the radius articulates with the capitulum of the humerus and the radial notch of the ulna at the elbow. The bones of the forearm are the radius (located on the lateral side) and the ulna (located on the medial side)īones of forearm, radius on left and ulna on the right Radius These veins can be used for cannularisation or venipuncture, although the cubital fossa is a preferred site for getting blood. The main superficial veins of the forearm are the cephalic, median antebrachial and the basilic vein. These usually run on the anterior face of the radius and ulna down the whole forearm. The radial and ulnar arteries and their branches supply the blood to the forearm. The ulnar nerve also runs the length of the forearm. The flexor muscles are more massive than the extensors because they work against gravity and act as anti-gravity muscles. The anterior compartment contains the flexors and is mainly supplied by the median nerve. The posterior compartment contains the extensors of the hands, which are supplied by the radial nerve. In cross-section, the forearm can be divided into two fascial compartments. The forearm contains many muscles, including the flexors and extensors of the wrist, flexors and extensors of the digits, a flexor of the elbow ( brachioradialis), and pronators and supinators that turn the hand to face down or upwards, respectively. Ultimately, the forearm is covered by skin, the anterior surface usually being less hairy than the posterior surface. The interosseous membrane connects these bones. The forearm contains two long bones, the radius and the ulna, forming the two radioulnar joints. It is homologous to the region of the leg that lies between the knee and the ankle joints, the crus. The term forearm is used in anatomy to distinguish it from the arm, a word which is used to describe the entire appendage of the upper limb, but which in anatomy, technically, means only the region of the upper arm, whereas the lower "arm" is called the forearm. The deep compartment of the contains the flexor digitorum profundus, flexor pollicis longus, and pronator quadratus.Ĭopyright © 2023, StatPearls Publishing LLC.The forearm is the region of the upper limb between the elbow and the wrist. The intermediate compartment contains the flexor digitorum superficially. The superficial compartment contains the pronator teres, the flexor carpi radialis, and the flexor carpi ulnaris. The muscles are separated into deep, intermediate, and superficial groups. The anterior compartment contains muscles that act to flex the wrist and digits. The mobile wad consists of three muscles: the brachioradialis, extensor carpi radialis longus, and extensor carpi radialis brevis. The deep group includes the supinator, abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus, and extensor indicia. The superficial group includes the extensor digitorum communis, extensor digiti minimi, extensor carpi ulnaris, and anconeus. The muscles are further broken down into deep and superficial groups. The muscles found in the posterior compartment primarily function to extend the wrists and digits. The compartments of the forearm are separated by an interosseous membrane found between the radius and ulna in addition to a lateral intermuscular septum. These include the anterior compartment, posterior compartment, and the mobile wad. It consists of several muscles and an extensive neurovascular network encased in three compartments. The forearm is the region of the body spanning from the elbow to the wrist.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |