Lateral epicondyle of the humerus
Lateral epicondyle of the humerus is a bony prominence on the humerus (the bone of the upper arm) located on its outer side. It serves as an attachment point for the muscles and ligaments of the forearm, playing a crucial role in the movement and stability of the elbow joint. The lateral epicondyle is positioned opposite the medial epicondyle of the humerus, and together, they provide attachment points for the muscles that extend and flex the wrist and fingers.
Anatomy
The lateral epicondyle is a small, tuberculated eminence, slightly posterior to the axis of the humerus bone. It gives attachment to the radial collateral ligament of the elbow joint, which is important for the joint's stability. The area surrounding the lateral epicondyle is known as the common extensor origin, where several muscles of the forearm, particularly those involved in extending the wrist and fingers, originate. These muscles include the extensor carpi radialis brevis, extensor digitorum, extensor carpi ulnaris, and extensor digiti minimi.
Clinical Significance
One of the most common conditions associated with the lateral epicondyle is lateral epicondylitis, also known as tennis elbow. This condition is characterized by pain and tenderness over the lateral epicondyle, often due to overuse or strain of the muscles and tendons attached to this area. It is particularly prevalent among athletes and individuals engaging in repetitive wrist and arm movements.
Treatment
Treatment for conditions affecting the lateral epicondyle, such as lateral epicondylitis, typically involves rest, ice, and anti-inflammatory medications to reduce pain and swelling. Physical therapy exercises aimed at strengthening and stretching the forearm muscles are also beneficial. In severe cases, corticosteroid injections or surgery may be considered to relieve symptoms.
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Contributors: Prab R. Tumpati, MD
