POSTERIOR PART OF LOWER EXTREMITY. 



383 

 (Fig. 



Two terminal branches the internal and external plantar nerves. 

 272.) 



Branches of the Posterior Tibial Artery. (i) The peroneal artery to the 

 outer side of the leg. (Fig. 266.) (2) A nutrient artery to the tibia, which you 

 will find entering the foramen as far down as the lower end of the oblique line of 

 the tibia, on the ridge separating the origin of the tibialis posticus from the flexor 

 longus digitorum. ( Fig. 208.) Find this artery and recall the rule for the direc- 

 tion of these foramina in the long bones of the extremities : from the knee and 



FIG. 269. MUSCLES OF THE LEG, EXTERNAL ASPECT. 



Tibialis anticus. 2, 2. Tendon of extensor proprius pollicis. 3, 3. Extensor longus digitorum. 4. 

 Its tendons for four last toes. 5. Peroneus tertius. 6. Its attachment to last two metacarpal bones. 

 7. Peroneus longus. 8. Its tendon. 9. Peroneus brevis. 10. Its tendon. II. Outer head of gas- 

 trocnemius. 12, 12. Solens. 13. Tendo Achillis. 14. Extensor brevis digitorum. 15, 15. Ab- 

 ductor minimi digiti. 16. Rectus femoris. 17. Vastus externus. 18. Its inferior fibres. 19. 

 Tendon of biceps femoris. 20. External lateral ligament of knee. 21. Tendon of popliteus. 



toward the elbow. (3) A communicating branch to the peroneal, on the back of 

 the tibia, under the flexor longus hallucis, two inches above the joint. (4) In- 

 ternal calcanean, which communicates with the external calcanean branch of the 

 peroneal artery behind the tendo Achillis. (Fig. 266.) (5) Muscular branches, 

 small and numerous, to the soleus and deep muscles on the back of the leg. 

 (Fig. 266.) 



The Posterior Tibial Canal. For practical purposes we may locate the 

 posterior tibial nerve and its accompanying vessels in a canal, bounded as follows : 



