WRIST LIGAMENTS ANATOMY AND FUNCTION
Wrist ligament nomenclature has evolved with increased anatomic and functional knowledge
Early anatomincal classification have given way to a more functional assessment

List of wrist ligaments grouped by location:

      • Extracapsular
               Flexor retinaculum
               Pisi-Hamate ligament
               Pisi- Metacarpal ligament
      • Intracapsular
               Radial collateral ligament
               Ulnar collateral ligament
               Dorsal radiotriquetral ligament
               Dorsal ulnotriquetral ligament
               Radioscaphocapitate ligament
               Radiolunotriquetral ligament
               Radioscapholunate ligament
               Short radiolunate ligament
               Ulnolunate ligament
               Palmar ulnotriquetral ligament
      • Intraarticular
               Scapholunate ligament (dorsal segment)
               Lunotriquetral ligament (dorsal segment)
               Dorsal scaphotriquetral ligament
               Dorsal scaphotrapeziotrapezoid ligament
               Scapholunate ligament (palmar segment)
               Lunotriquetral ligament (palmar segment)
               Palmar scaphotriquetral ligament
               Radial bundle collateral ligament
               Ulnar bundle of the collateral ligament
               Palmar scaphotrapeziotrapezoid ligament
               Interosseous ligament joining trapezium, trapezoid, capitate, and hamate

WRIST LIGAMENT ALTERNATIVE GROUPING

      • JOINT
          eg Scapholunate
      • ORIENTATION
          transverse, longitudinal, oblique
      • STABILISING FUNCTION
          antopronation, antisupination

The helical antipronation group are those that keep the wrist stable during axial compression or pronation
The scaphoid rotates forward - constrained by the radio- scapho-capitate lig
The triqyetral extends - constrained by the ulnotriquetral and ulnolunate ligs
The dorsal scapholunate and radio-scapho-triquetral ligs

The helical antisupination group protect against traction and over supination
Ther are two groups, medial and lateral
The medial are The lateral are a line of ligaments extending from the ulna to the tripezium on the volar surface
The medial group protect the ulnar corner and are the dorsal radio-scapho-lunate and the
Palmar triquetro-hamate-capitate