Lateral supracondylar ridge

Lateral Supracondylar Ridge

The lateral supracondylar ridge is a prominent bony ridge located on the lateral aspect of the distal end of the humerus bone. It is an important anatomical landmark that serves as an attachment site for various muscles and ligaments.

Anatomy

The lateral supracondylar ridge is a raised bony ridge that extends laterally from the distal end of the humerus bone. It is located just above the lateral epicondyle, which is another prominent bony landmark on the humerus. The ridge runs in an oblique direction and provides attachment points for several structures.

Function

The lateral supracondylar ridge serves as an attachment site for various muscles and ligaments involved in the movement and stability of the elbow joint. Some of the important structures that attach to this ridge include:

• Brachioradialis muscle: This muscle originates from the lateral supracondylar ridge and inserts into the styloid process of the radius bone. It plays a role in flexing the forearm at the elbow joint.

• Extensor carpi radialis longus muscle: This muscle also originates from the lateral supracondylar ridge and inserts into the base of the second metacarpal bone. It is involved in extending and abducting the wrist joint.

• Lateral collateral ligament: This ligament attaches to the lateral supracondylar ridge and provides stability to the lateral aspect of the elbow joint.

Clinical Significance

The lateral supracondylar ridge is an important landmark for various clinical procedures and assessments. Some of its clinical significance includes:

• Elbow arthroscopy: Surgeons often use the lateral supracondylar ridge as a reference point during elbow arthroscopy procedures to locate and access the joint.

• Elbow fractures: Fractures involving the lateral supracondylar ridge can occur due to trauma or repetitive stress. These fractures may require surgical intervention for proper alignment and healing.

• Elbow instability: In cases of elbow instability, the integrity of the lateral collateral ligament, which attaches to the lateral supracondylar ridge, may be compromised. This can lead to recurrent dislocations or subluxations of the elbow joint.