Palmar Radioulnar Ligament from the Anterior

Description

Oriented from the anterior aspect of the distal forearm and wrist, the palmar radioulnar ligament is presented as the volar stabilizing band spanning from the distal radius toward the ulnar side of the radiocarpal complex. Its fibers course obliquely and blend with the triangular fibrocartilage disc (articular disc of the distal radioulnar joint), inserting into the distal articular cartilage at the ulnar notch region and adjacent fibrocartilage. Distal to this, the carpal bones form the proximal carpal row beneath the ligamentous plane, with the metacarpals and phalanges extending distally in an anatomic hand posture. Cartilage-bearing articular surfaces are emphasized at the wrist and hand joints. This palmar (volar) ligament is one of the principal soft tissue constraints to dorsal translation of the ulna relative to the radius at the distal radioulnar joint (DRUJ), and it contributes to tensioning of the triangular fibrocartilage complex during forearm rotation. It matters in the setting of TFCC tears and DRUJ instability after a fall on an outstretched hand, where pain localizes to the ulnar wrist and clinical tests often reproduce symptoms during pronation and supination. A hard-working stabilizer. The anterior orientation also mirrors the volar surgical corridor used for certain DRUJ and TFCC procedures, where respecting the ligament’s insertion helps avoid persistent postoperative instability. Use this plate in upper limb anatomy teaching to connect carpal alignment with the DRUJ and TFCC, or in orthopaedic and hand surgery materials discussing ulnar-sided wrist pain, arthroscopic TFCC debridement or repair, and mechanisms of DRUJ subluxation. It also suits radiology and sports medicine publications that need a clear anatomic reference for the articular disc and its volar attachments. Anatomical accuracy verified by SciePro's Medical Advisory Board.