The palmar carpal ligament (PCL) is a thick, dense estruture that firmly attaches to the carpal bones and forms the dorsal wall of the CT (REEF, 1998).
Caption: Figure 4 (A, B, C)--Palmar carpus: PIL = palmar intercarpal ligament, CS = carpal sheath, SDFT = superficial digital flexoi tendon, PODDFT = proximal origin of the deep digital flexor tendon, CT = carpal tunel, PCL = palmar carpal ligament, intermediate carpal bone.
CT is particularly useful for diagnosis of injuries affecting the carpal bones (sclerosis, fracture), the wall and contents of the carpal sheath (deep digital flexor tendon, superficial digital flexor tendon, accessory ligament of the superficial digital flexor tendon, flexor retinaculum, palmar carpal ligament), and the proximal attachment of the suspensory ligament (Bergman & Saunders, 2011).
The palmar carpal ligament formed by thickening of the fibrous layer of the joint capsule and is composed of obliquely crossing fibers arranged in layers.
Its roof is formed by the palmar carpal ligament
, (antebrachial fascia), and the palmaris brevis muscle, the floor is formed by the hypothenar muscles and the flexor retinaculum.