Olecranon process

Olecranon Process

The Olecranon Process (pronounced: oh-LEK-rah-non) is a prominent feature of the ulna, one of the two bones in the forearm. It is a large, bony prominence that can be easily felt at the back of the elbow.

Etymology

The term "Olecranon" is derived from the Greek words "olekranon" which means "elbow". The term "process" in anatomy refers to a projection or outgrowth on a body part or bone.

Anatomy

The Olecranon Process is the rounded bony extension of the ulna, fitting into the olecranon fossa of the humerus when the arm is extended. It forms the point of the elbow and receives the force from the muscles that extend the forearm.

Function

The primary function of the Olecranon Process is to provide leverage for the triceps brachii muscle, which is the large muscle on the back of the arm that allows for extension of the forearm. It also serves as an attachment site for muscles and ligaments, including the ulnar collateral ligament.

Related Terms

Ulna: One of the two bones in the forearm, the other being the radius. The ulna is larger and longer than the radius and is located on the side of the little finger.
Humerus: The bone of the upper arm or forelimb, forming joints at the shoulder and the elbow.
Triceps brachii muscle: A large muscle on the back of the upper limb of many vertebrates. It is the muscle principally responsible for extension of the elbow joint.
Ulnar collateral ligament: One of the main stabilizing ligaments in the elbow, especially with movements of flexion and extension.