186 ANATOMY IN A NUTSHELL. 



artery which arises about an inch below the Popliteus and passes along the 

 inner side of the fibula to the lower third of the leg where it divides into an 

 anterior and posterior peroneal. The peroneal artery itself gives off (a) mus- 

 culab branches to the muscles at the hack and outer side of the leg, (b) nutri- 

 ent to fibula, (c) INTERIOR PERONEAL which runs through the interosseous 

 membrane and then descends to the outer ankle, (d) Communicating branch 

 runs inward to unite with a similar branch of the posterior tibial, (e) Pos- 

 terior PERONEAL continues with the main artery to the outer side of the os 

 calcis. (f) The external calcanean sends several branches to the outer 

 side of the heel. (2) Muscular branch* s which pass to the muscles on the back 

 of the leg. (3) Nutrient to the tibia. This branch also gives off muscular 

 branches. (4) Communicating branch which runs across the tibia and unites 

 with a similar branch from the peroneal. (5) Internal calcanean which sends 

 several branches to the internal side of the heel. 



Flu external plantar artery (Plates LV-LVI-LVIII) passes between the 

 Flexor brevis digitorum and Flexor accessorius to the base of the fifth meta- 

 tarsal bone. It now bends inward and arches across the bases of the fourth, 

 third, ami second metatarsals to the interval between the second and first meta- 

 tarsal, where it joins the communicating branch of the dorsalis pedis to com- 

 plete the plantar arch. The branches of the external plantar are (1) posterior 

 perforating: which are three in number and run between the heads of the three 

 outer Dorsal mterossei to join the interosseous branches of the metatarsal 

 arteries. (2) Digital branches are four. The first runs along the outer side and 

 plantar aspect of the little toe, the outer branches run along the three outer in- 

 terosseous spaces to the base of the toes where each one sends an anterior per- 

 forating branch to join an interosseous branch of the metatarsal, and then 

 divides into two brandies for the adjacent sides and plantar aspects of the toes. 



The internal plantar artery (Plates LV-LVI-LVIII) passes above the Ab- 

 ductor hallucis, then between it and the Flexor brevis digitorum, and from here 

 along the inner side of the great toe to anastomose with the digital branch from 

 the princeps hallucis. 



The Relations of the Posterior Tibial Artery. 



1\ Front. — (1) Tibialis posticus, (2) Flexor longus digitorum, (3) Tibia, 

 I Ankle-joint. 



Behind. (1) Integument, (2) Fascia. (3) Gastrocnemius, (4) Soleus, 

 (5 Deep transverse fascia, (6) Posterior tibial nerve, (7) Abductor hallucis. 



Outer Side. Posterior tibial nerve, lower two-thirds. 



Inner Side. Posterior tibial nerve, upper third. 



The Relations of the Peroneal Artery. (Plate LXIX.) 



In Front, fit Tibialis posticus, (2) Flexor longus hallucis. 



Behind. (1) Soleus, (2) Deep transverse fascia, (3) Flexor longus hallucis 



Outer Side. (1) Fibula, (2) flexor longus hallucis. 



Inner Side. Flexor longus hallucis. 



Veins. 

 The external iliac vein (Plate XC) is a continuation of the femoral vein 



