LEG AND FOOT. 



respectively; (third and fourth) same structures on fibular 

 sides of third and fourth toes. [388] 



Plantar Interossei. Origin; (of all three) tibial side of 

 outer three metatarsals, by a single head each. Insertion; 

 same as Dorsal interossei, on tibial sides of three outer toes. 



[389] 



NERVES. 



Anterior Crural. The long (internal) saphenous becomes 

 cutaneous at the inner side of the knee, descends on the leg 

 with the internal saphenous vein, runs in front of the inner 

 ankle, and ends at the middle of the inner border of the foot. 

 Its terminal branches supply the skin on the front and inner side 

 of the leg, and posterior half of the dorsum and inner side of the 

 foot. [646] 



Peroneal or External Popliteal. Descending with the Biceps 

 tendon in the outer part of the popliteal space over the outer 

 head of the Gastrocnemius, this divides just below the head of 

 the fibula into the recurrent tibial, anterior tibial, and muscu- 

 lo-cutaneous. Branches in popliteal space. The sural pierces 

 the deep fascia over the outer head of the Gastrocnemius and 

 supplies the skin on the upper two-thirds of the outer aspect of 

 the back of the leg. The peroneal communicating descends 

 over the outer head of the Gastrocnemius to the middle third 

 of the leg and usually unites with the tibial communicating 

 branch to form the external (short) saphenous; it may not 

 unite, either replacing the latter or supplying the outer side of 

 the leg, heel, and ankle only. [650] 



The recurrent tibial runs forward under the Peroneus longus 

 and Extensor longus digitorum; it divides below the outer 

 tibial tuberosity into branches to the Tibialis anticus, tibio- 

 fibular joints, and knee-joint. [650] 



Anterior Tibial. This descends under the Peroneus longus, 

 Extensor longus digitorum, and Extensor proprius hallucis, ly- 

 ing on the front of the interosseous membrane and lower part 



[299] 



