These pads fill the radial and coronoid fossa anteriorly during extension, and the olecranon fossa posteriorly during flexion.
3.
A few of these fibres stretch across the olecranon fossa without attaching to it and form a transverse band with a free upper border.
4.
Close to the elbow, the ulna has a bony process, the olecranon process, a hook-like structure that fits into the olecranon fossa of the humerus.
5.
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.
6.
The "'olecranon fossa "'is a deep triangular depression on the posterior side of the humerus, superior to the trochlea, in which the summit of the olecranon is received during extension of the forearm.
7.
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.
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