– Located in the subcutaneous tissue above the cubital fossa is a very superficial vein: the median cubital vein. Three main nerves begin together at the shoulder the radial nerve, the ulnar nerve and the medial nerve. There are actually three articulations involved with the elbow joint. While flexion and extension are the only movements that can occur at the elbow joint itself, movement is also afforded at the proximal radioulnar joint, which contributes to the elbow joint. The elbow is a hinge, but it isn’t just a single joint. It includes two articulations: (a) humero-ulnar articulation, between the trochlea of the humerus and trochlear notch of the ulna, and (b) humero-radial articulation, between the capitulum of the humerus and the head of radius. Elbow Anatomy and Techniques . The ends of the bones are covered with cartilage. Learning anatomy is a massive undertaking, and we're here to help you pass with flying colours. Smooth movement at these joints is provided by a highly viscous synovial fluid, which acts as a lubricant. Each bone … The radiohumeral and proximal radioulnar joint allows axial rotation or a pivoting (trochoid) type of motion. The rounded distal end of the humerus is divided into two joint processes — the trochlea on the … St. Louis, MO 63110, 13001 N Outer Forty Road Pronation and supination are easily visualised when the elbow is flexed at 90°. 2. The long head originates from the infraglenoid tubercle of the scapula, the lateral head originates from the lateral aspect of the humerus above the radial groove, and the medial head originates from the medial aspect of the humerus below the level of the radial groove. Ligaments: principally the radial and ulnar collateral ligaments and the annular ligament of the radius. Elbow Anatomy The elbow is where the two bones of the forearm – the radius on the thumb side of the arm and the ulna on the pinky finger side – meet the bone of the upper arm -- the humerus. The unique positioning and interaction of the bones in the joint allows for a small amount of rotation as well as hinge action. Together these ligaments provide the main source of stability for the elbow, holding the humerus and the ulna tightly together. Elbow, in human anatomy, hinge joint formed by the meeting of the humerus (bone of the upper arm) and the radius and ulna (bones of the forearm). Without the elbow, many simple daily activities such as eating, toileting, and getting dressed would be very difficult to perform. Quiz quiz which has been attempted 1656 times by avid quiz takers. A fibrous capsule encloses the joint, and is lined internally by a synovial membrane. The proximal radioulnar joint is the articulation between the circumferential head of the radius and a fibro-osseous ring formed by the radial groove of the ulna and the annular ligament that hold the head of the radius in this groove. This rotation is easily noticed during activities such as hand-to-mouth eating motions. The outside (lateral) bump just above the elbow is called the lateral epicondyle. The elbow joint articulation is classified as a trochoginglymoid joint. While the biceps brachii and the brachialis muscles are the main flexors of the elbow joint, the brachioradialis muscle is also involved in flexion of the forearm at this joint. A third ligament, the annular ligament, holds the radial head tight against the ulna. For medial evaluation, the elbow is slightly flexed to bring the anterior bundle of … It is a synovial joint structurally but functionally is a hinge joint. The distal fibres blend with the annular ligament that encloses the head of the radius, as well as with the fibres of the supinator and the extensor carpi radialis brevis muscles. The following two study units will teach you that topic in a fun and engaging way. Elbow Joint: Anatomy, Movement & Muscle involvement. You’ve got the humerus, the radius and the ulna. A common cause is tendinitis, an inflammation or injury to the tendons that attach muscle to bone. 77 The ulnohumeral joint resembles a hinge (ginglymus), allowing flexion and extension. It’s actually comprised of three different bones and three different joints. Synovial joints, also called diarthroses, are free movable joints. The radial collateral ligament has a low attachment to the lateral epicondyle of the humerus. The elbow is a synovial variety of hinge joint, formed within the distal end of the humerus and the proximal ends of the ulna and radius in the forearm. Epicondylitis is inflammation of the soft tissues surrounding the epicondyles of the humerus. It is also classified structurally as a compound joint, as there are two articulations in the joint. Here are is a mnemonic that can help you remember the articulations involved in the elbow joint. The annular ligament also reinforces the joint by holding the radius and ulna together at their proximal articulation. The proximal radioulnar joint is functionally a pivot joint, allowing a rotational movement of the radius on the ulna. Pronation in the anatomical position is movement of the forearm so that the palm is facing posteriorly. Francesca Salvador MSc Anatomy of the Elbow The elbow is a hinge joint made up of the humerus, ulna and radius. Muscles and tendons help the elbow joint move. And proximal radioulnar joint … the anatomy of the bones are covered with cartilage elbow becomes child 's play you. 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