Lateral supracondylar ridge

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Lateral supracondylar ridge

The lateral supracondylar ridge is a prominent anatomical feature of the humerus, the long bone in the upper arm. It is located on the lateral side of the humerus, extending from the lower part of the deltoid tuberosity to the lateral epicondyle of the humerus. This ridge serves as an important attachment site for muscles and ligaments involved in the movement of the elbow and forearm.

Anatomy

The lateral supracondylar ridge is part of the distal humerus and is situated above the lateral epicondyle. It provides attachment for the brachioradialis muscle, which is involved in flexing the forearm at the elbow. Additionally, the extensor carpi radialis longus muscle, which extends and abducts the hand at the wrist, also attaches to this ridge.

Function

The primary function of the lateral supracondylar ridge is to serve as an attachment point for muscles that facilitate the movement of the elbow and wrist. The brachioradialis muscle, originating from this ridge, plays a crucial role in flexing the forearm, especially when the forearm is in a mid-pronated position. The extensor carpi radialis longus muscle, also originating from this ridge, is essential for wrist extension and abduction.

Clinical Significance

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

Related Structures

• Medial supracondylar ridge
• Lateral epicondyle
• Medial epicondyle
• Deltoid tuberosity
• Brachioradialis
• Extensor carpi radialis longus

See Also

• Humerus
• Elbow joint
• Forearm muscles
• Wrist joint