Anatomy of the Shoulder Joint

The connection between the humerus and radius bones in the elbow joint, specifically occurring at the capitulum (humerus) and the head of the radius.

The articulation between the humerus and ulna, primarily through the trochlea (humerus) and the trochlear notch (ulna).

Bending of the forearm at the elbow joint, where the trochlear notch moves relative to the trochlea.

Straightening of the forearm at the elbow joint, with the olecranon moving into the olecranon fossa and the coronoid process exiting the coronoid fossa.

Supporting structures of the elbow joint, including the medial collateral ligament (ulnar), lateral collateral ligament (radial), and annular ligament.

The three bones comprising the true elbow joint: the humerus, radius, and ulna.

Projections of the humerus, acting as origins for many forearm muscles.

A part of the distal humerus, serving as an articular surface for the ulna during elbow movement.

Allows supination and pronation of the forearm by rotating the radius around the ulna.

The elbow joint can only flex and extend.

The radiocarpal joint has ligaments (collateral, anterior, posterior) to limit excess movement during flexion and extension.

The triangular fibrocartilage complex (TFCC) connects the ulna to the wrist joint, increasing wrist stability.

Radial and ulnar collateral ligaments stabilize the wrist by limiting adduction and abduction, preventing excessive movement.

Palmar radiocarpal and palmar ulnocarpal ligaments form the anterior ligamentous complex, further stabilizing wrist flexion and extension.

The biceps brachii, brachialis, and brachioradialis are the three key muscles responsible for elbow flexion.

The medial collateral ligament (MCL) has anterior, posterior, and intermediate fibers.

The upper end of the humerus, forming the glenohumeral joint and having attachment sites for muscles (greater & lesser tubercles).

A bony bump on the radius where the biceps brachii tendon attaches.

Originates from the coracoid process of the scapula, a bony part of the shoulder.

Attaches to the ulna tuberosity.

Has three heads (long, lateral, medial) with different scapular and humeral origins that converge at a single tendon.

Inserts into the olecranon process of the ulna.

The lower end of the humerus, articulating with the ulna and radius to form the elbow joint.

Where a muscle ends and attaches to a bone.