forearm extensors

Card Set Information

Author:
Naheer
ID:
54450
Filename:
forearm extensors
Updated:
2010-12-08 21:03:36
Tags:
anatomy
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Description:
forearm extensor muscles
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  1. what are all extensors innervated by:
    radial nerve
  2. what are the extensors held in place by?
    extensor retinaculum
  3. brachioradialis
    • o: lateral surface of humerus
    • i: styloid process radius
    • a: flex forearm at elbow
    • inn: fradial nerve
  4. extensor carpi radialis longus
    • o: supracondylar ridge of humerus
    • i: base of 2nd metacarpal
    • a: extend and abduct hand at wrist
    • inn: radial
  5. extensor carpi radialis brevis
    • o: lateral epicondyle of humerus
    • i: base 3rd metacarpal
    • a: extend and abduct hand at wrist
    • inn: radial
  6. extensor carpi ulnaris
    • o: lateral epicondyle of humerus and posterior border ulna
    • i: 5th metacarpal
    • a: extend and adduct hand at wrist joint
    • inn: radial
  7. extensor digitorum
    • o: lateral epicondyle humerus
    • i: branch into 4 tendons of inseriton: middle and distal phalanges
    • a: extend medial 4 fingers
    • inn: radial
  8. extensor digit minimi
    • a: lateral epicondyle humerus
    • i: extensor expansion 5th finger
    • a: extend 5th finger
    • inn: radial
  9. Supinator
    • o: lateral epicondyle humerus
    • i: lateral surface radius
    • a: supinate forearm
    • inn: radial

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