Posterior Forearm - Deep layer Flashcards
Extensor pollicis brevis origin
posterior surface of distal third radius and interosseous membrane
extensor pollicis brevis action
- extension of hand
- extension of carpometacarpal and metacarpophalangeal joint
extensor pollicis brevis insertion
base of proximal phalanx of thumb
extensor pollicis brevis nerve and blood supply
Posterior interosseous
extensor pollicis longus origin
posterior surface of middle third of ulna and interosseous membrane
extensor pollicis longus insertion
base of distal phalanx of thumb
extensor pollicis longus nerve and blood supply
posterior interosseous
extensor pollicis longus action
- extension at wrist
- extension of distal phalanx at interphalangeal joint
- extension at carpometacarpal and metacarpophalangeal joints of digit 1
extensor indicis insertion
extensor expansion of digit 2
extensor indicis nerve and blood supply
posterior interosseous
extensor indicis origin
posterior surface of distal third of ulna and interosseous membrane
extensor indicis action
- extension of hand
- extension of digit 2
abductor pollicis longus origin
- posterior surface of proximal halves of ulna
- radius
- interosseous membrane
abductor pollicis longus insertion
base of 1st metacarpal
abductor pollicis longus nerve and bs
posterior interosseous
abductor pollicis longus action
- extension at wrist
- abduction of digit 1
- extension at carpometacarpal joint
supinator action
supination of forearm
supinator origin
- lateral epicondyle
- radial collateral and annular ligaments
- supinator fossa
- crest of ulna
supinator insertion
lateral, posterior, and anterior surfaces of proximal third of radius
supinator nerve and bs
deep branch of radial nerve
radial recurrent artery
