Lateral supracondylar ridges

Lateral supracondylar ridges are anatomical features found on the humerus bone of the upper arm. These ridges are located on the distal end of the humerus, just above the lateral epicondyle. They serve as important attachment points for muscles and ligaments.

Anatomy

The lateral supracondylar ridge is a bony prominence that extends proximally from the lateral epicondyle of the humerus. It is more pronounced than the medial supracondylar ridge and provides attachment for the brachioradialis and extensor carpi radialis longus muscles. These muscles are involved in the flexion and extension of the forearm and wrist.

Function

The primary function of the lateral supracondylar ridge is to serve as an attachment site for muscles that control movements of the forearm and wrist. The brachioradialis muscle, which attaches to this ridge, is responsible for flexing the forearm at the elbow. The extensor carpi radialis longus muscle, also attached to this ridge, extends and abducts the wrist.

Clinical Significance

Injuries to the lateral supracondylar ridge can occur due to trauma or overuse. Such injuries may result in pain, swelling, and limited movement of the elbow and wrist. Conditions such as lateral epicondylitis (tennis elbow) can also affect the muscles attached to this ridge, leading to inflammation and discomfort.

Related Structures

• Medial supracondylar ridge
• Lateral epicondyle
• Medial epicondyle
• Humerus
• Brachioradialis
• Extensor carpi radialis longus

See Also

• Lateral epicondylitis
• Humerus
• Elbow joint
• Forearm muscles