Extensor carpi ulnaris muscle

Extensor carpi ulnaris muscle is one of the muscles of the human forearm. It is located on the ulnar side and is responsible for the extension and adduction of the wrist. The term "extensor carpi ulnaris" is derived from Latin, with "extensor" meaning "to extend", "carpi" referring to the "wrist", and "ulnaris" indicating its location near the ulna, one of the two bones in the forearm.

Origin and Insertion

The extensor carpi ulnaris originates from the lateral epicondyle of the humerus and the posterior border of the ulna. It inserts into the base of the fifth metacarpal bone.

Function

The primary function of the extensor carpi ulnaris is to extend and adduct the wrist. This means it helps in moving the wrist upwards and towards the little finger side of the hand. It also provides stability to the wrist during gripping activities.

Clinical Significance

Injury or overuse of the extensor carpi ulnaris can lead to conditions such as tennis elbow or golfer's elbow. These conditions are characterized by pain and tenderness on the outer or inner side of the elbow, respectively. Treatment usually involves rest, physical therapy, and in some cases, surgery.

Related Terms

• Extensor muscles: A group of muscles that help in extending or straightening parts of the body.
• Carpal bones: The eight small bones that make up the wrist.
• Ulnar deviation: The movement of the wrist towards the ulna or the little finger side of the arm.

See Also

• Flexor carpi ulnaris muscle
• Extensor carpi radialis muscle
• Extensor digitorum muscle

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