Hand Flashcards
joints of hand?
distal/proximal interphalangeal joints
interphalangeal joint (thumb)
Metacarpophalangeal joints
carpometacarpal joints
midcarpal joint
radiocarpal joint
carpal bones?
hamate, capitate, trapezoid, trapezium, scaphoid, lunate, triquetrum, pisiform
what are the muscles of the hand divided into? what are their locations and functions?
extrinsic - in forearm, power grips
intrinsic - in hand, precision grips
what 3 muscles make up the thenar eminence from medialish to lateralish? innervation?
flexor pollicis brevis (medial)
abductor pollicis brevis (lateral)
opponens pollicis (deep)
recurrent branch of median nerve
what is located deep to thenar eminence? what is it innervated by?
adductor pollicis (transverse and oblique head)
ulnar nerve
3 muscles in hypothenar eminence and their innervation?
abductor digiti minimi
flexor digiti minimi brevis
opponens digiti minimi
ulnar nerve
which muscles attach to tendons of flexor digitorum profundus
lumbricals
lumbricals action?
flex metacarpophalangeal joints
extend interphalangeal joints
muscles deep to lumbricals? innervation?
palmar and dorsal interossei
ulnar nerve
function of palmar and dorsal interossei
Palmar ADducts
Dorsal ABducts
PAD-DAB
which palmar arch is supplied by which artery?
superficial palmar arch - ulnar
deep palmar arch - radial
venous drainage of the hand
dorsal venous network to cephalic/basilic veins, then axillary vein
(if via basilic vein then basilic->brachial->axillary)
what does the median nerve innervate in the hand
motor to thenar eminence and lateral 2 lumbrical muscles
sensory to palm and lateral 2 digits
what does the ulnar nerve innervate in the hand
motor to intrinsic hand muscles other than thenar eminence and lateral 2 lumbrical muscles
sensory to medial two digits
what forms the roof of the carpal tunnel
flexor retinaculum
