Lateral supraepicondylar ridge

Study entry

Description

Sharp ridge that runs down the lateral border of the distal third of the humerus to the lateral epicondyle.

Relations

Origin of the brachioradialis and of the extensor carpi radialis longus.

Source: cap. 3, «Huesos del miembro superior: húmero»

Clinical correlation

Nerve injury in fracture of the shaft of the humerus; supracondylar fracture

A fracture of the middle of the humerus may injure the radial nerve in the radial groove; the triceps hardly stops, because the nerves to two of its heads leave above. A fracture near the supraepicondylar ridges (supracondylar) may displace the distal fragment forward or backward; the brachialis and the triceps pull it over the proximal one and shorten the limb, and the fragments may wound the neighboring brachial nerves and vessels.

Related clinical cases

• Nerve injury in fracture of the shaft of the humerus; supracondylar fracture

Other structures in this region

• Conoid tubercle
• Trapezoid line
• Scapular notch
• Glenoid cavity
• Supraglenoid tubercle
• Infraglenoid tubercle
• Subscapular fossa
• Supraspinous fossa