Dorsal Radioulnar Ligament

Description

Dorsal radioulnar ligament

Anatomy of the TFCC including the dorso radioulnar ligament

Anatomic relationship between ECU sheath floor, prestyloid recess, and triangular fibrocartilage complex (TFCC), which comprises ulnocarpal ligamentous complex (UCLC), disk, and palmar and dorsal radioulnar (RU) ligaments.

The dorsal radiocarpal ligament, dorsal distal radioulnar ligament and dorsal intercarpal ligament

Name

• Dorsal Radioulnar Ligament (DRUL)
• Ligamentum Radioulnare Dorsale
• Posterior Radioulnar Ligament
• Dorsal radioulnar ligament of the TFCC
• Dorsal radioulnar component of the TFCC
• Dorsal distal radioulnar ligament
• Dorsal DRUJ ligament
• Posterior distal radioulnar ligament
• Dorsal radioulnar capsular ligament

General

• One of the primary stabilizers of the distal radioulnar joint
• Contributes to the triangular fibrocartilage complex

Gross Anatomy

• Deep and superficial division can be considered separate laminae
• Attach into the radial fovea and ulnar styloid respectively

Anatomic Relationships

• Intimately related to the volar radioulnar ligament
• During pronation, volar ligament is lax and dorsal ligament tightens
• During supination, dorsal ligament relaxes and volar ligament tightens

Vascular Supply

• Palmer and Dorsal Branches of Anterior Interosseous Artery

Innervation

• Anterior Interosseous Nerve
• Posterior Interosseous Nerve

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Clinical Significance

• Distal Radioulnar Joint Dislocation
• Distal Radioulnar Joint Instability
• Distal Radial Ulnar Joint Injection
• Galeazzi Fracture
• Colles Fracture
• Smith Fracture

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See Also

• Wrist Anatomy Main
• Physical Exam Wrist
• Wrist Pain Main

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