1 / 16

FRONT OF FOREARM

FRONT OF FOREARM. Dr. Ahmed Fathalla Ibrahim. MUSCLES OF FRONT OF FOREARM. SUPERFICIAL GROUP (5) From lateral to medial: Pronator teres (PT) Flexor carpi radialis (FCR) Palmaris longus (PL) (may be absent) Flexor digitorum superficialis FDS) Flexor carpi ulnaris (FCU) DEEP GROUP (3)

dustin
Download Presentation

FRONT OF FOREARM

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. FRONT OF FOREARM Dr. Ahmed Fathalla Ibrahim

  2. MUSCLES OF FRONT OF FOREARM • SUPERFICIAL GROUP (5) From lateral to medial: • Pronator teres (PT) • Flexor carpi radialis (FCR) • Palmaris longus (PL) (may be absent) • Flexor digitorum superficialis FDS) • Flexor carpi ulnaris (FCU) • DEEP GROUP (3) • Flexor pollicis longus (FPL) • Flexor digitorum profundus (FDP • Pronator quadratus (PQ)

  3. SUPERFICIAL GROUP • ORIGINS: • All 5 muscles have a HUMERAL HEAD (arising from the front of medial epicondyle of humerus: (common flexor origin). IN ADDITION: • 3 out of 5 muscles have an ULNAR HEAD: • PT & FDS: arise from medial border of coronoid process of ulna • FCU: arises from medial surface of olecranon process & posterior border of shaft of ulna • One muscle has a RADIAL HEAD: • FDS: arises from oblique line & anterior border of shaft of radius

  4. SUPERFICIAL GROUP • ACTIONS & INSERTIONS: • One pronator of radioulnar joints (PT): produces powerful pronation • Any muscle acting on radioulnar joint must be inserted into radius • Insertion: middle of lateral surface of shaft of radius (point of maximum curvature)

  5. SUPERFICIAL GROUP • ACTIONS & INSERTIONS: • 3 flexors of wrist joint (FCR, FCU, PL) • Any “carpi” is inserted into metacarpal bone • FCR (flexion + abduction of wrist joint): inserted into 2nd & 3rd metacarpal bones • FCU (flexion + adduction of wrist joint): insertedinto 5th metacarpal bone (+ pisiform & hamate) • PL (flexion of wrist joint): inserted into palmar aponeurosis

  6. SUPERFICIAL GROUP • ACTIONS & INSERTIONS: • One flexor of medial 4 fingers (FDS): produces flexion of proximal interphalangeal & metacarpophalangeal joints of medial 4 fingers • Insertion:by 4 tendons into the middle phalanges of medial 4 fingers

  7. SUPERFICIAL GROUP

  8. SUPERFICIAL GROUP

  9. DEEP GROUP • ALL MUSCLES ARE ATTACHED TO ANTERIOR SURFACE OF SHAFT OF RADIUS AND/OR ULNA

  10. DEEP GROUP

  11. Flexor pollicis longus • ORIGIN: Middle of anterior surface of shaft of radius(+ interosseous membrane) • INSERTION: distal phalanx of thumb • ACTION: flexion of interphalangeal & metacarpophalangeal joints of thumb

  12. FLEXOR DIGITORUM PROFUNDUS • ORIGIN: Upper ¾ of anterior surface of shaft of ulna(+ interosseous membrane) • INSERTION: by 4 tendons into thedistal phalanges of medial 4 fingers • ACTION: flexion of distal & proximal interphalangeal + metacarpophalangeal joints of medial 4 fingers

  13. PRONATOR QUADRATUS • ORIGIN: Lower ¼ of anterior surface of shaft of ulna • INSERTION: Lower ¼ of anterior surface of shaft of radius • ACTION: main pronator of radioulnar joints

  14. DEEP GROUP

  15. DEEP GROUP

  16. NERVE SUPPLY • ALL MUSCLES OF FRONT OF FOREARM ARE SUPPLIED BY MEDIAN NERVE EXCEPT: • FCU ULNAR • MEDIAL HALF OF FDP NERVE

More Related