1166 



SURGICAL AND TOPOGRAPHICAL ANATOMY 



runs obliquely inwards across the palm, with a marked inclination towards the 

 wrist, and ends at the outer limit of the hypothenar eminence. The third, lowest, 

 and 'best-marked of the folds starts froin the little elevation opposite the cleft 

 between the index and middle fingers, and runs nearly transversely to the ulnar 

 border of the hand, crossing the hypothenar eminence at the upper end of its lower 

 fourth. An unimportant crease, running obli(iuely from the third to the second 

 fold, gives to these markings the outline of the letter M. The first fold is i)roduced 

 by the adduction of the thumb- the second, mainly by the bending simultaneously 



Fig. 730.— The Deepek Muscles of the Palm of the Hand. 



Flexor carpi 

 ulnariB 



Abductor minimi 

 digiti 



Flexor sublimia 

 digitorum 



Flexor brevis 

 minimi digiti 



Flexor profundus 

 digitorum 



Extensor ossis metacarpi pollicis 

 Flexor carpi radialis 

 Extensor brevis pollicis 



Abductor pollicis 



Opponens pollicis 



Abductor 

 pollicis 

 Flexor brevis 

 pollicis 



Adductor 

 pollicis 



of the metacarpo-phalangeal joints of the first and second fingers; and tlic third by 

 the flexion of the three inner fingers. The second fold, as it crosses the third 

 metacarpal bone, about corresponds to the lowest part of the superficial palmar 

 arch. The third fold crosses the necks of the metacarpal bones, and indicates 

 l)retty nearly the upi)er limits of the synovial sheaths for the flexor tendons of the 

 three outer fingers. A little way below this fold, the palmar fascia breaks up into 

 its four slips, and midway between the fold and the webs of the fingers lie the 

 metacarpo-phalangeal joints. Of the transverse folds across the fronts of the 



