Week 3 Flashcards
Function of wrist complex
Control length tension relationship in hand muscles and permit fine adjustments of grip
Two compound joints of wrist
Radiocarpal and midcarpal (called wrist complex)
Carpal bones list
Scaphoid, lunate, triquetrum, pisifiomr, hamate, capitate, trapezoid, trapezium
Bones of radoiocarpal joint and movement inclinations
Radius, radioulnar disc, scaphoid, lunate, triquetrum; favors ulnar deviation and flexion
Midcarpal joint bones and movement inclinations
Proximal carpal row (minus pisiform) and distal carpal row; is condyloid joint with 2deg freedom; favors extension and radial deviation
Axis of rotation for flexion vs extension
Flexion is proximal carpal row, extension is capitate
Carpal row initiation of flexion vs extension
Extension initiated at distal row w/capitate at center, flexion imitated at proximal row
Carpal movement of ulnar deviation
Radoiocarpal joint: scaphoid, lunate, and tri roll ulnar and slide radial; midcarpal joint: cap rolls ulnar and slides radial
Carpal movement of radial deviation
RC joint: scaphoid, lunate, and tri roll radial and slide ulnar; MC joint: cap rolls radial and slides ulnar; limited by styloid process
Volar wrist muscles
Palmaris longus, flexor carpi radialis, FC ulnaris, flexor digitorum superficialis, FD profundus, flexor pollicis longus
Dorsal wrist muscles
Extensor carpi radialis longus and brevis, EC ulnaris, extensor digitorum, ext digiti minimi, ext indicis, Abd pollicis longus, ext pollicis longus and brevis
All wrist flexors pass under ___ except ___
flexor retinaculum; palmaris longus
Prime movers and assist for wrist flexion
FCR and FCU prime movers, PL assist
Prime movers for wrist ext
ECRL, ECRB, ECU
