The ‘Space of Poirier’ is a critical anatomical defect in the volar wrist capsule that predisposes the joint to catastrophic lunate and perilunate dislocations. This interval is located strictly between which two strong volar radiocarpal ligaments?

Explanation:
The correct option is d. The Space of Poirier is an inherent, V-shaped weak area in the tough volar radiocarpal ligamentous complex, located directly over the volar aspect of the capitolunate joint. It is bordered radially by the radioscaphocapitate (RSC) ligament and ulnarly by the long radiolunate (LRL) ligament. When the wrist is violently hyperextended, this space gapes open, allowing the lunate to herniate forward into the carpal tunnel, resulting in the classic volar lunate dislocation that severely compresses the median nerve. Reference: Mayfield JK. Mechanism of carpal injuries. Clin Orthop Relat Res.