hand 2 Flashcards
finger flexors
- flexor digitorum superficialis
- flexor digitorum profundus
finger extensors
- extensor digitorum
- extensor indicis
- extensor digiti minimi
intrinsic muscles (muscles within the hand)
- interossei
- lumbricals
- opponenes digiti minimi
- adductor pollicis
- abductor digiti minimi
- abductor pollicis brevis
flexor digitorum superficialis
1) origin
2) insertion
3) action
1) medial epicondyle of humerous, coronoid process of ulna and shaft of radius
2) by 4 tendons into middle phalanges of fingers 2-5
3) flexes hand and middle phalanges of fingers 2-5
flexor digitorum profundus
1) origin
2) insertion
3) action
1) anteriomedial surface of ulna & interosseous membrane
2) by 4 tendons into distal phalanges of finger 2-5
3) flexes distal interphalangeal joints of 2-5
extensor digitorum
1) origin
2) insertion
3) action
1) lateral epicondyle of humerous
2) by 4 tendons to distal phalanges of fingers 2-5
3) extends and abducts hand
extensor indicis
1) origin
2) insertion
3) action
1) posterior surface of distal ulna & interosseous membrane
2) joins tendon of extensor digitorum
3) extends index finger
extensor digiti minimi
1) origin
2) insertion
3) action
1) lateral epicondyle of humerous
2) extensor expansion of 5th digit
3) extends little finger at metatcarpophalangeal and interphalangeal joints
oppones digiti minimi
1) location
2) action
1) metacarpal 5
2) assists opposition
abductor digiti minimi
1) location
2) action
1) proximal phalax of little finger
2) abducts little finger
flexor digiti minimi
1) location
2) action
1) proximal phalanx of little finger
2) flexes little finger
lumbricals
1) location
2) action
1) in each finger
2) flex metacarpophalangeal joints and extends interphalangeal joints
palmar interossei
1) location
2) action
1) in space between metacarpals
2) adducts fingers
dorsal interossei
1) location
2) actiom
1) in space between metacarpals
2) abducts
thenar muscles
- Oppenens Pollicis (OP)
- Abductor Pollicis Brevis (APB)
- Flexor Pollicis Brevis (FPB)
