/ '( ;.v /'/:/< 10 A' PART Of LOWER EXTREMITY. 



389 



diverging branches of the V -incision you made in the skin. You will noticeth.it 

 the three divisions of the plantar fascia correspond to the three muscles in the 

 first layer, cover them, and in great part are almost inseparably connected there- 

 with. (Fig. 273.) The plantar fascia is part of the origin of these muscles. 

 Remove this fascia ( Figs. 281 and 273) and trace out with the forceps the 

 branches of the internal and external plantar nerves and vessels. (Fig. 272.) 



The plantar fascia has a central part that covers the flexor brevis digitorum ; 

 an outer portion that covers the abductor minimi digiti, and is continuous with 

 the dorsal fascia of the loot externally ; an inner portion that covers the abductor 



Part of abductor minimi digit! 



Flexor brevia minimi digiti 



Tranaversus pedia 



Divided tendons of flexor brevia 

 digitorum 



LonK plantar (long inferior 

 oaloaneo-cuboid) ligament 



Flexor longus halluoia 

 Flexor longua digitorum 

 Tlbialia posticua 



Flexor breviB hallucia 



Adductor hallucis 



Tendon of the flexor longus 

 nallucia 



Tendon of flexor longus digitorum 



KII:. 274. THIRD LAYER OF THE MUSCLES OF THE SOLE. 



hallucis, and is continuous internally with the dorsal fascia of the foot. Poste- 

 riorly, the plantar fascia is attached to the os calcis ; anteriorly, it is continuous 

 with the ligamenta vaginales. 



Muscles of the First Layer (Fig. 273). Dissect carefully in the grooves 

 between the middle muscle and the muscles on each side of it. Trace all three 

 muscles back to their origins on the os calcis. (Fig. 268.) Likewise trace each 

 forward to its insertion: the abductor hallucis to the base of the first phalanx 

 of the great toe (Fig. 268) ; the abductor minimi digiti to the base of the first 

 phalanx of the little toe ; the flexor brevis digitorum to the second phalanges 

 of the four lesser toes, by cutting through the ligamenta vaginales the long 





