Upper limb

Extrinsic wrist ligaments (Palmar and dorsal radio- and ulnocarpal ligaments)

Ligamenta radiocarpalia, ulnocarpalia et radioulnaria

Origin

Distal radius, ulnar styloid, and TFCC complex

Insertion

Proximal and distal carpal rows (scaphoid, lunate, triquetrum, capitate, pisiform)

Function

Primary extrinsic stabilizers preventing ulnar and volar translocation of the carpus on the inclined radial articular surface

Innervation

Anterior and posterior interosseous nerves (C6–C8)

Movement & chain

Coordinates multi-planar carpal row kinematics

Palpation

Palpable along volar and dorsal wrist creases

Clinical

Wrist sprain; perilunate dislocation and lesser arc injuries; radiocarpal instability.

Segmental innervation

C6–C8

In clinical practice

Proprioceptive wrist rehab, carpal stability taping, and Gilula lines radiographic evaluation

Region in the model

Upper limb