Olecranon fossa

 ( Bones Of The Upper Limb ) 

The olecranon fossa is a deep triangular depression on the posterior side of the humerus, superior to the trochlea. It provides space for the olecranon of the ulna during extension of the forearm.

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Structure The olecranon fossa is located on the posterior side of the distal humerus.

The joint capsule of the elbow attaches to the humerus just proximal to the olecranon fossa.

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Function The olecranon fossa provides space for the olecranon of the ulna during extension of the forearm, from which it gets its name.

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Other animals

The olecranon fossa is present in various Mammal, including Dog.

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Additional images

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External links

• Photo of model at Waynesburg College skeleton3/olecranonfossa
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• Imaging at umich.edu

Categories: Bones Of The Upper Limb, Humerus

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