Common extensor tendon

Common Extensor Tendon is a tendon located in the forearm that serves as the attachment point for the muscles that extend the wrist and fingers. This tendon is crucial for the proper functioning of the hand and arm, and injuries to it can result in significant impairment.

Anatomy

The Common Extensor Tendon originates from the lateral epicondyle of the humerus, a bony prominence on the outside of the elbow. It is the convergence point for the tendons of several muscles, including the extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris. These muscles are responsible for extending the wrist and fingers, and they all share the common extensor tendon as their point of attachment to the bone.

Function

The primary function of the Common Extensor Tendon is to facilitate the extension of the wrist and fingers. This is achieved through the coordinated contraction of the muscles attached to it. When these muscles contract, they pull on the tendon, which in turn pulls on the bones of the wrist and fingers, causing them to extend.

Clinical Significance

Injuries to the Common Extensor Tendon, such as tendonitis or tendon rupture, can result in significant pain and disability. One of the most common conditions affecting this tendon is lateral epicondylitis, also known as "tennis elbow". This condition is characterized by inflammation of the tendon where it attaches to the lateral epicondyle, causing pain and tenderness on the outside of the elbow.

Treatment for injuries to the Common Extensor Tendon typically involves rest, physical therapy, and in some cases, surgery. Early diagnosis and treatment are crucial to prevent long-term complications and to ensure a full recovery.

See Also

• Tendon
• Forearm
• Lateral epicondyle
• Extensor carpi radialis brevis
• Extensor digitorum
• Extensor digiti minimi
• Extensor carpi ulnaris
• Tendonitis
• Tendon rupture
• Lateral epicondylitis