Articularis cubiti muscle

The triceps brachii muscle, with the articularis cubiti muscle located near the elbow joint.

The articularis cubiti muscle is a small, often overlooked muscle located in the posterior compartment of the arm. It is considered a part of the triceps brachii muscle group and plays a role in the movement and stabilization of the elbow joint.

Anatomy

The articularis cubiti muscle is a derivative of the triceps brachii muscle. It is situated near the elbow, specifically attaching to the posterior capsule of the elbow joint. This muscle is often described as a collection of fibers that arise from the deep surface of the triceps brachii, particularly from the medial head.

Function

The primary function of the articularis cubiti muscle is to retract the joint capsule of the elbow during extension, preventing it from being pinched by the olecranon process of the ulna. This action is crucial for smooth and pain-free movement of the elbow joint.

Innervation

The articularis cubiti muscle is innervated by the radial nerve, which also supplies the triceps brachii muscle. The radial nerve is responsible for the motor control of the posterior compartment of the arm.

Clinical Significance

While the articularis cubiti muscle is not commonly associated with specific pathologies, its function is important in maintaining the integrity of the elbow joint during movement. Dysfunction or injury to this muscle could potentially contribute to joint capsule issues or elbow pain.

Related Pages

• Triceps brachii muscle
• Elbow joint
• Radial nerve