5. Wrist & Hand Flashcards
CMC
Carpometacarpal joint; thumb joint; saddle-joint
MCP
Metacarpal-phalangeal joints; Collateral ligaments; knuckles
IP
Interphalangeal joints; hinge joints; collateral ligaments; thumb = 1 joint; Digits 2-5 have PIP & DIP
Ulnar n.
Travels between pisiform & hamate; Peripheral nerve innervation palmar and dorsal surface of hand 1/2 of 4th digit & all of 5th
Median n.
Travels between pisiform & scaphoid; carpal tunnel; Peripheral nerve innervating majority of palmar hand surface & dorsal tips of digits 2, 3, & 1/2 of 4.
Radial n.
Travels under radial styloid; Innervates majority of dorsal hand surface & dorsal thumb
Radial a.
Under styloid process of radius
Ulnar a.
BIFURCATES AROUND HAMATE
Wrist extensors
Extensor carpi radialis (longus & brevis); Extensor carpi ulnaris
Wrist flexors
Flexor carpi radialis; Flexor carpi ulnaris
Ulnar deviators
Extensor carpi ulnaris; Flexor carpi ulnaris
Radial deviators
Extensor carpi radialis; Flexor carpi radialis
Thumb Abductor
Abductor pollicus longus (radial)
Thumb Extensors
Extensor pollicus brevis (radial); Extensor pollicus longus (ulnar); Abductor pollicus longus (radial)
Thumb Flexor
Flexor pollicus
Finger flexion
Flexor digitorum superficialis & profundus
Finger extension
Extensor digitorum; Extensor indicis
Thenar eminence innervation
Median n.
Hypothenar eminence innervation
Ulnar n.
Carpal Tunnel Syndrome Tests
Tinel sign; Phalan’s; Reverse Phalan’s