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. 



FIG. I2i. SUPERFICIAL Mrsci.i-N <>|.- I'ALMAR ASPECT OF FOREARM. 



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

 anticus. 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. n. Its attachment 

 to pisiform bone. 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 bone. 18. Tendon of extensor 

 secundi internodii pollicis. 19, 19. Flexor sublimis digitorum. 20, 20. Tendons of this muscle. 

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

 profundus digitorum to last phalanges of fingers. 23, 23. Lumbricales. 24. Abductor pollicis. 

 25. Its insertion into first 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. 



