Final answer:
Lateral epicondylitis, known as 'tennis elbow', involves overuse of forearm extensor muscles, especially the extensor carpi radialis brevis, which originate from the lateral epicondyle of the humerus. This condition leads to inflammation and tendinitis, often diagnosed by clinical examination and sometimes requiring surgery.
Step-by-step explanation:
Lateral epicondylitis, commonly known as 'tennis elbow,' is associated with the overuse of the muscles in the forearm that extend the wrist and fingers. These muscles, particularly the extensor carpi radialis brevis, originate from the lateral epicondyle of the humerus. This condition is often seen in individuals performing repetitive movements that strain the extensor muscles and their tendinous attachments at the lateral epicondyle, leading to tendinitis
Continuous, repetitive activities can lead to microtrauma and the initiation of an inflammatory response in the tendons, manifesting as pain and tenderness around the lateral elbow. This is frequently diagnosed by clinical examination and, in severe cases, may be investigated with X-rays to exclude bone injuries. Non-invasive treatments, such as rest and physical therapy, are often recommended, while surgical intervention may be necessary in severe tendon injuries.