806 



THE XERVOUS SYSTEM 



(6) The anterior crural nerve is the largest branch of the luinhar iilexiis. It 

 arises by three roots, Avhicli spring from the second, third, and fourth lunil)ar 

 nerves; these roots traverse the substance of the psoas and unite into a single trunk 

 in the deep groove between the psoas and iliacus muscles. The nerve then passes 

 under cover of the fascia iliaca, behind Poupart's ligament, into Scarpa's triangle, 

 where it lies external to the femoral sheath and divides into two groups of terminal 

 branches — the superticial and deep. 



In the abdominal part of its course the anterior crural nerve gives branches to 

 the iliacus, and a twig to the femoral artery. 



Fig. 463.— Axtekior Crural axd Obturator Nerves. (Ellis.) 



Femora' vein Femoral nrtery 



Peetineus 

 OBTURATOR {ANTERIOR DIV.) 



OBTURATOR (POSTERIOR 

 1)1 VISION) 



/ ■ 

 Adductor longus — k 



Adductor brevis 



OBTURA TOR 



(ANTERIOR 



DIVISION) 



Adductor magnus 



GENICVLA TF 

 BRANCH 01 

 OBTURATOR 



Semi-membranosus 



Sartoriua 



Iliacus 



ANTERIOR CRURAL 



Tensor vaginae femoris 



Profunda artery 



Peetineus 

 Eeetus femoris 



LONG SAPHENOUS 



XERVE TO VASTUS 

 INTERNUS 



Adductor longus 



Femoral artery 



Anaslomotica artery 



PATELLAR BRANCH OF 

 LONG SAPHENOUS 



The superficial terminal branches are muscular and cutaneous; they are sc})- 

 arated from the dee]) branches by the external circumflex artery. 



The muscular branches of the superticial series contain fibres from the second 

 and third lumljar nerves; they are tAvo in number — one to the peetineus, Avhich 

 passes behind the femoral sheath to the anterior surface of the peetineus muscle, 

 and one to the sartorius. The latter usually accompanies one of the two divisions 

 of the middle cutaneous ner^-e. 



The cutaneous branches of the superficial series are the internal and middle 



