i 7 6 



PRACTICAL ANATOMY. 



The flexor carpi radialis muscle (Fig. 120) is seldom properly dissected by 

 the student to its specific insertion. Trace its tendon through two canals, and to 

 two bones for insertion ; one canal is on the outer side of the annular ligament, 

 the other is in the bone at the base of the thumb the OS trapezium. The 

 muscle is inserted into the bases of the second and third metacarpals. 



lo 



FIG. 121. SUPERFICIAL MUSCLES OK PALMAR Asn-.i i i FOKKAKM. 



I. Lower portion of biceps. 2. Bicipital fascia. 3. Tendon of insertion into radius. 4, 4. Brachialis 

 aniicus. 5. Internal head of triceps 6. Pronator radii teres. 7. Flexor carpi radialis. 8. Pal- 

 maris longus. 9. Its termination in palmar ligament. 10. Flexor carpi ulnaris. II. Its attachment 

 to pisiform hone. 12. Supinator longus. 13. Its attachment to styloid process of radius. 14, 14. 

 Extensor carpi radialis longior. 15. Extensor carpi radialis brevior. 16. Extensor ossis metacarpi 

 pollicis. 17. Its tendon of insertion into base of first metacarpal hone. 18. Tendon of extensor 

 secuncli internody pollicis. 19, 19. Flexor suhlimis dighorum. 20, 2O. Tendons of this muscle. 

 21, 21. Their attachment to second phalanges of fingers. 22, 22. Attachment of tendons of flexor 

 profundus digitorum to last phalanges of lingers. 23, 23. Lumhricales. 24. Abductor pollicis. 

 25. Its insertion into fir.^t phalanx of thumb. 26, 26. Flexor longus pollicis. 27. Flexor brevis 

 minimi digiti. 28. Abductor minimi digiti. 



The palmaris longus muscle is properly a tensor of the palmar fascia. The 

 muscle is inserted into the annular ligament and also into the palmar fascia. It 

 is often absent. It is a decided flexor of the carpus. 



