The palmar intercarpal ligaments connect adjacent carpal bones on their palmar surfaces, maintaining the carpal arch and resisting dorsal carpal displacement. The most important are the palmar radioscaphoid, radiocapitate, and the short radiolunate ligaments. Their disruption in carpal instability allows the carpus to collapse into DISI or VISI patterns.
| Origin | Palmar surfaces of the proximal carpal bones |
|---|---|
| Insertion | Palmar surfaces of the adjacent carpal bones |
| Actions | Maintain palmar carpal arch; resist dorsal carpal subluxation; limit excessive intercarpal motion |
|---|
Wrist arthroscopy systematically assesses both the dorsal and palmar intercarpal ligaments via the radiocarpal and midcarpal portals. Palmar SLIL (volar SL ligament) tears are visualised from the midcarpal portal. Thermal shrinkage of lax palmar intercarpal ligaments provides temporary improvement in dynamic carpal instability.
Palmar intercarpal complex failure contributing to dynamic carpal instability managed with wrist arthroscopy and ligament repair or reconstruction.
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