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.
Volar Ligaments of Wrist
Following are main categories of ligaments of wrist on volar aspect
- Palmar aponeurosis
- Radial Collateral
- Triangular Fibrocartiage complex
- Flexor Retinaculum
- Palmar Radiocarpal Ligaments
- Palmar Ulnocarpal Ligaments
- Palmar Intercarpal Ligaments
- Palmar Carpometacarpal Ligaments
In terms of intrinsic and extrinsic, the important ligaments are as follows
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
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.
Dorsal Ligaments of Wrist
Following are main categories of ligaments of wrist on doral aspect
- Radial Collateral Ligament
- Ulnar Collateral Ligament
- Dorsal Radiocarpal Ligaments
- Dorsal Intercarpal Ligaments [trapezoidal-triquetral ligament]
- Dorsal Carpometacarpal Ligaments
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