MUSCLES 



808 



MUSCLES 



Muscles of Dorsal Aspect of 

 Forearm, Superficial Layer. 

 X. Tendon of triceps. 2. Upper ex- 

 tremity of supinator longus. 3. Ex- 

 tensor carpi radialis longior. 4. Its 

 attachment to second metacarpal 

 bone. 5. Extensor carpi radialis 

 brevior. 6. Its attachment to third 

 metacarpal bone. 7. Extensor ossis 

 metacarpi pollicis. 8, 8. Extensor 

 primi internodii pollicis. 9, 9. Ex- 

 tensor secundi internodii pollicis. 10, 

 10. Annular ligament. 11. Extensor 

 communis digitorum. 12, 12. Attach- 

 ment of its four tendons to the second 

 and third phalanges. 13. Tendon of 

 the extensor indicis. 14. Tendon of 

 extensor minimi digiti. 15. Extensor 

 carpi ulnaris. 16. Its attachment to 

 fifth metacarpal bone. 17. Anconeus. 

 18. Flexor carpi ulnaris. 19. Posterior 

 border of ulna. 20. Olecranon. 21. 

 Internal condyle of humerus. 



2i3 



Muscles of Dorsal Aspect of 

 Forearm, Deep Layer. 

 1. Tendon of triceps. 2. Internal head 

 of triceps. 3. Anconeus. 4. Humeral 

 attachment of supinator longus. 5. 

 Humeral attachment of extensor 

 carpi radialis longior. 6, 6. Tendon 

 of insertion into second metacar- 

 pal bone. 7. Upper extremity of 

 extensor carpi radialis brevior. 8, 

 8. Its tendon of insertion into 

 third metacarpal bone. 9. Com- 

 mon tendon of the superficial and 

 deep muscles. 10. Supinator brevis. 

 11. Radial insertion of pronator radii 

 teres. 12. Extensor ossis metacarpi 

 pollicis. 13. Extensor primi interno- 

 dii pollicis. 14. Extensor secundi in- 

 ternodii pollicis. 15. Extensor indicis. 

 16. Its tendon, uniting with corre- 

 sponding tendon of common exten- 

 sor. 17. Tendon of extensor minimi 

 digiti. 18. Tendon of extensor carpi 

 ulnaris. 19. Flexor carpi ulnaris, dis- 

 placed to show flexor profundus digi- 

 torum. 20. Fibrous arch extending 

 from epitrochlea to olecranon and 

 forming the upper portion of the deep 

 flexor. 21. Annular ligament. 22, 

 22. Dorsal interossei. 23. Abductor 

 minimi digiti. 24, 24. Tendons of ex- 

 tensor communis digitorum. 



Deep Muscles of Palmar Aspeci 

 of Forearm. 



I . Lower portion of triceps. 2, 2. A 

 tachments of pronator radii teres. 

 Attachment of flexor carpi radiali 

 palmaris longus, and flexor sublim 

 digitorum. 3'. Tendon of bic< 

 Tendon of brachialis anticus. 4. 

 Flexor carpi ulnaris. 5. Supinat< 

 longus. 6. Its distal attachment 

 Supinator brevis. 7'. Extensa 

 radialis longior. 8, 8. Extensi 

 metacarpi pollicis. 9. Flexoi | 

 dus digitorum. 10. Its four tei 

 11. Tendon for index finger 

 Tendon for middle finger. 1 : 

 don of flexor sublimis. 14 

 of flexor profundus for littK 

 15, 15. Lumbricalcs 16, 16 

 ments of abductor brevis 17 

 nens pollicis. 18. Flev 

 licis. 19. Adductor pollicis. 20, 

 longus pollicis. 21. Its tendon. J 

 22. Attachments of flexor br< 

 adductor minimi digiti. 2.5 

 nens minimi digiti. 



