The ligaments of wrist can be volar or dorsal depending on whether they are on dorsal aspect or volar.
Each is further of two types – extrinsic and intrinsic.
Extrinsic ligaments are the ligaments that link the carpal bones to the radius, ulna, and metacarpals. These ligaments are attached to roughened areas on the dorsal and palmar surfaces of the carpal bones.
Intrinsic ligaments are the ligaments that connect the carpal bones to each other.
Ligaments of wrist are most highly developed on palmar side of wrist as compared to dorsal side.
Here is the list of intrinsic and extrinsic ligaments of wrist
• Scapholunate ligament (dorsal segment)
• Lunotriquetral ligament (dorsal segment)
• Dorsal scaphotriquetral ligament
• Dorsal scaphotrapeziotrapezoid ligament
• Scapholunate ligament (SLIL, palmar segment)
• Lunotriquetral ligament (LTIL, palmar segment)
• Palmar scaphotriquetral ligament
• Radial bundle of the collateral ligament
• Ulnar bundle of the collateral ligament
• Palmar scaphotrapeziotrapezoid ligament
• Interosseous ligament joining trapezium, trapezoid, capitate, and hamate Radial side
• Radial collateral ligament
• Ulnar collateral ligament (UC)
• Dorsal radiotriquetral ligament (DRT)
• Dorsal ulnotriquetral ligament
• Radioscaphocapitate ligament (RSC)
• Radiolunotriquetral ligament
• Radioscapholunate ligament (RSL)
• Short radiolunate ligament (SRL)
• Ulnolunate ligament (UL)
• Palmar ulnotriquetral ligament (UT)
Other Important Volar and Dorsal Structures of Wrist
Following are main categories of ligaments of wrist on volar aspect
- Palmar aponeurosis
- Radial Collateral
- Triangular Fibrocartiage complex
- Flexor Retinaculum
Following are main categories of ligaments of wrist on doral aspect
Superficial Extensor Retinaculum
Radial intrinsic ligaments arise on palmar facet of radial styloid passing on to capitate
Ulnar sided intrinsic ligaments
- Capitohamate ligaments
- Lunotriquetral ligaments
Palmar Ulnar Extrinsic ligaments:
- Ulnotriquetral ligaments
- Ulnolunate ligaments
Palmar Radial Extrinsic Ligaments:
Short Radiolunate igament
It arises from palmar fibers of TFCC, distal part of radius and inserts into proximal part of palmar surface of lunate
Long Radiolunate ligament
It runs from the palmar rim of the distal part of the radius to the radial margin of palmar horn of lunate.
The radiolunate ligament continues further and pass from lunate to triquetrum as lunotriquetral ligament.
It is radial expansion of radiocapitate ligament and inserts onto the tuberosity of scaphoid.
This ligament arises from palmar aspect of ridge between scaphoid & lunate fossae & inserts into scapholunate interosseous ligament.
From volar aspect of radial styloid process, runs across scaphoid through groove , and inserts into palmar side of capitate. It forms a fulcrum over which the scaphoid rotates.
Radiocapitate ligament is primary stabilizer of capitolunate joint, and is the primary stabilizer of the distal carpal row on proximal one.
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