The palmar radiocarpal ligaments (radioscaphocapitate, long and short radiolunate) are the primary stabilisers of the radiocarpal joint, running from the volar radial rim to the proximal carpal row. Disruption produces carpal instability. The RSC ligament forms the floor of the Poirier space that opens in perilunate dislocations.
| Origin | Palmar rim of the distal radius |
|---|---|
| Insertion | Scaphoid, lunate, and triquetrum |
| Actions | Primary palmar wrist stabilisers; prevent dorsal carpal translocation |
|---|
Volar Barton fracture involves the palmar lip of the radius carrying the carpus volarward, requiring surgical fixation to restore the radiocarpal ligament attachment and volar buttress.
Palmar radial rim shear fracture with radiocarpal ligament disruption producing carpal subluxation requiring surgical fixation.
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