372 



MUSCLES ON THE PALM OF THE HAND. 



unciforme, and from the base of the metacarpal bone of the 

 middle finger. 



Inserted, by the first head into the outer sesamoid bone, and 

 by the second into the inner sesamoid bones. These bones 

 act the parts of patellae, by having a tendinous connexion with 

 the first phalanx of the thumb. 



XJsb. To bend the first joint of the thumb. 



5. Adductor PoUicis Manus, 



Fig. 98.* 



Arises, fleshy, from almost the 

 whole length of the metacarpal 

 bone that sustains the middle 

 finger ; from thence its fibres are 

 collected together. 



Inserted, tendinous, into the 

 inner part of the root of the first 

 phalanx of the thumb. 



Use. To pull the thumb to- 

 wards the fingers. 



There are four small flexors, 

 called, from their form. 



6. Lumhricales, 



Which arise, thin and fleshy, 

 from the outside of the tendons 

 of the flexor profundus, a little 

 above the lower edge of the ligamentum carpi annulare. 



* The muscles of the hand. 1. The annular ligament. 2, 2. The origin 

 and insertion of the abductor poUicis muscle ; the middle portion has been 

 removed. 3. The flexor ossis metacarpi, or opponens pollicis. 4. One portion 

 of the flexor brevis pollicis. 5. The deep portion of the flexor brevis pollicis. 

 6. The adductor pollicis. 7, 7. The lumbricales muscles, arising from the deep 

 flexor tendons, upon which the numbers are placed. The tendons of the flexor 

 sublimis have been removed from the palm of the hand. 8. One of the tendons 

 of the deep flexor, passing between the two terminal slips of the tendon of the 

 flexor sublimis to reach the last phalanx. 9. The tendon of the flexor longus 

 pollicis, passing between the two portions of the flexor brevis to the last pha- 

 lanx. 10. The abductor minimi digiti. 11. The flexor brevis minimi digiti. 

 The edge of the flexor ossis metacarpi, or adductor minimi digiti, is seen pro- 

 jecting beyond the inner border of the flexor brevis. 12. The prominence of 

 the pisiform bone. 13. The first dorsal interosseous muscle. 



