Extensor Muscles Of Forearm(deep layer) Flashcards
(20 cards)
Supinator d.a.
Lateral, posterior, and anterior surfaces of proximal third of radius
Supinator p.a.
LEH
Supinator innervation
Deep branch of radial nerve
C7c8
Supinator action
Supinates forearm
Abductor pollicis longus p.a.
Posterior surface of proximal halves of ulna, radius, and interosseous membrane
Abductor pollicis longus d.a.
Base of first metacarpal
Abductor pollicis longus innervation
Posterior interosseous nerve
C7c8
Cont. of deep branch of radial nerve
Abductor pollicis longus action
Abducts thumb and extends it at carpometacarpal joint
Extensor pollicis longus p.a.
Posterior surface of middle third of ulna and interosseous membrane
Extensor pollicis longus d.a.
Dorsal aspect of base of distal phalanx of thumb
Extensor pollicis longus innervation
Posterior interosseous nerve
C7c8
Cont. of deep branch of radial nerve
Extensor pollicis longus action
Extends distal phalanx of thumb at interphalangeal joint
Extensor pollicis brevis p.a.
Posterior surface of distal third of radius and interosseous membrane
Extensor pollicis brevis d.a.
Dorsal aspect of base of proximal phalanx of thumb
Extensor pollicis brevis innervation
Posterior interosseous nerve
C7c8
Cont. of deep branch of radial nerve
Extensor pollicis brevis action
Extends proximal phalanx of thumb at metacarpophalangeal joint
Extensor indicis p.a.
Posterior surface of distal third of ulna and interosseous membrane
Extensor indicis d.a.
Extensor expansion of 2nd finger
Extensor indicis innervation
Posterior interosseous nerve
C7c8
Cont. of deep branch of radial nerve
Extensor indicis action
Extends 2nd finger(enabling its independent extension)
