MT- Forearm and hand complex

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MT- Forearm and hand complex
2011-08-01 13:59:51
Forearm hand muscle skeleton

an overview of the muscles and bone structure of the forearm and muscle
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  1. Bones that make up the the forearm and hands





  2. Joints that make up the forearm and hand
    humeroradial joint

    humeroulnar joint

    proximal radial joint

    radiocarpal joint

    distal carpal joint

    midcarpal joints

    carpometacarpal joints

    intermetacarpal joints

    metacarpalphalangeal joints

    proximal interphalangeal joints

    distal interphalangeal joints
  3. Brachialis

    O: distal half of anterior surface of humerus

    I: tuberosity and coronoid of ulna

    A: flex the elbow
  4. brachioradials

    O: lateral suprcondylar ridge of humerus

    I: Styloid process of radius

    A: flex the elbow
  5. Extensor carpi radialis longus and brevis
    • O: longus: lateral supracondylar ridge of humerus
    • brevis: lateral epicondyle of humerus

    • I: longus: base of second metacarpal
    • brevis: base of third metacarpal

    • A: Extend and abduct the wrist
    • assists the flexing of the elbow
  6. Extensor carpi unaris
    O: lateral epicondyle of humerus

    I: base of fifth metacarpal

    A: extend and adduct the wrist
  7. extensor digitorum
    O: lateral epicondyle of humerus

    I: bases of middle and distal phalanges of second through fifth fingers

    A: extends 2-5 fingers and extends the wrist
  8. anconeus
    O: lateral epicondyle of the humerus

    I: olecranon process and posterior, proximal surface of ulna

    A: extend the elbow
  9. extensor indicis
    O: surface of distal shaft of ulna and interosseous membrane

    I: second metacarpal ; tendon of distal shaft of ulna

    • A: extend, adduct, second finger
    • extend wrist
  10. Flexors of the wrist and fingers

    Flexor carpi radialis
    flexor carpi ulnaris
    flexor didtorum superficialis
    flexor digitorum profundus
    O: as one mass from the common flexer tendon at the medial epicondyle of humerus

    I: at the philanges

    A: flexion of fingers
  11. pronator teres
    O: common flexor tendon from medial epicondyle of humerus and coronoid process of ulna

    I: middle of lateral surface of radius

    • A: pronate forearm
    • assist flex in elbow
  12. Pronator quadratus
    O: medial, anterior surface of distal radiu

    I: lateral , anterior surface of distal radius

    A:pronate forearm