Wrist And Hand Flashcards
Most commonly broken carpal
Scaphoid
Carpal bones
8 short bones
Lateral to medial
Prox: scaphoid. Lunate. Triquetral: pisiform.
Distal: trapezium. Trapezoid. capitate. Hamulus.
Most commonly dislocated carpal
Lunate
Scaphoid
Carpal.
Proximal, most lateral
Most commonly broken
Boat shaped
Articulates with radius (radiocarpal joint)
Has a tubercle which anchors flexor retinaculum
Lunate
Carpal
Most frequently dislocated
Crescent shaped
Articulates with radius (radiocarpal joint)
Triquetrum
Carpal
Articulates with ulna via meniscis
Ulnomeniscotriquestral joint
Pisiform
Carpal
Sits on triquetal bones.
Acts as Sesamoid for FCU
Anchors flexor retinaculum
Trapezium
Carpal
Distal, most lateral
Saddle shaped. Articulates with 1st metacarpal
Tubercle anchors flexor retinaculum.
Trapezoid
Distal
Supports base of 2nd metacarpal
Capitate
Carpal
“Keystone”
Mid carpal, centre of wrist
Cube shaped.
Hamate
Distal, most lateral carpal
Contains hook of hamate which anchors flexor retinaculum.