olecranon fossa

It is also proximal to the olecranon fossa.

A few of these fibres stretch across the olecranon fossa without attaching to it and form a transverse band with a free upper border.

It also prevents the elbow joint capsule being pinched in the olecranon fossa during extension of the elbow.

It is also distinguished by the presence of a trochlear-form ulnar articulation and a distal olecranon fossa.

It is directly inferior to the coronoid fossa anteriorly and to the olecranon fossa posteriorly.

The posterior fat pad is normally pressed in the olecranon fossa by the triceps tendon, and hence invisible on lateral radiograph of the elbow.

Extension is limited by the olecranon reaching the olecranon fossa, tension in the anterior ligament, and resistance in flexor muscles.

Proximally, the ulna has a bony process, the olecranon process, a hook-like structure that fits into the olecranon fossa of the humerus.

Limb bones with rounded shafts; distal humerus with rounded capitulum, deep olecranon fossa and prominent trochlear keels.

These pads fill the radial and coronoid fossa anteriorly during extension, and the olecranon fossa posteriorly during flexion.

It is bent forward at the summit so as to present a prominent lip which is received into the olecranon fossa of the humerus in extension of the forearm.

On the humerus, it extends up from the articular margins and covers the coronoid and radial fossae anteriorly and the olecranon fossa posteriorly.

The lower extremity consists of 2 epicondyles, 2 processes (trochlea & capitulum), and 3 fossae (radial fossa, coronoid fossa, and olecranon fossa).

Above the back part of the trochlea is a deep triangular depression, the olecranon fossa, in which the summit of the olecranon is received in extension of the forearm.

Above, it is attached to the humerus immediately behind the capitulum and close to the medial margin of the trochlea, to the margins of the olecranon fossa, and to the back of the lateral epicondyle some little distance from the trochlea.

The transverse fibers form a strong band which bridges across the olecranon fossa; under cover of this band a pouch of synovial membrane and a pad of fat project into the upper part of the fossa when the joint is extended.

It passes medialward upon the Brachialis, and piercing the medial intermuscular septum, winds around the back of the humerus between the Triceps brachii and the bone, forming, by its junction with the profunda brachii, an arch above the olecranon fossa.