ANTERIOR CRURAL NERVE 195 



Muscular to adductor longus, gracilis, adductor brevis, and 

 pectineus (occasionally) . 



Cutaneous becomes superficial in the middle third of the thigh, 

 and supplies skin of the lower two-thirds of the inner side of the 

 thigh, and ends in the subsartorial plexus. The terminal branch, 

 which enters Hunter's canal, ramifies over the femoral artery. 



The Deep part of the obturator nerve pierces obturator ex- 

 ternus and passes down between adductor brevis and adductor 

 magnns ; it then passes through adductor magnus, and, entering 

 the popliteal space, terminates by supplying the knee-joint. 



Branches. Muscular to obturator externus, adductor magnus 

 and adductor brevis (if not already supplied by the superficial 

 part) . 



Articular to the knee-joint. 



The Anterior Crural nerve arises from the second, third, and 

 fourth lumbar nerves behind the obturator nerve. It is formed 

 in the substance of psoas, and, emerging from its outer border, 

 it passes down between psoas and iliacus, and enters the 

 thigh by passing under Poupart's ligament on the outer side of 

 the femoral vessels. In Scarpa's triangle it breaks up into 

 branches to supply the front of the thigh. 



Branches. In the abdomen : Muscular to iliacus. 



In Scarpa's triangle : Muscular to pectineus, sartorius, and 

 quadriceps extensor. 



Articular to the hip and knee joints. 



Cutaneous. The cutaneous branches are in three sets middle 

 and internal cutaneous and long saphenous. 



Middle Cutaneous nerve arises in two parts the external and 

 internal. They supply the skin on the lower three-fourths 

 of the front of the thigh, and end in the patellar plexus. 



Internal Cutaneous nerve lies in Scarpa's triangle on the 

 outer side of the femoral vessels, over which it crosses, and, 

 dividing into three branches, all of which terminate in the 

 patellar plexus, supplies the skin on the lower two-thirds of the 

 inner side of the thigh. 



The Long Saphenous nerve arises in Scarpa's triangle. It 

 passes down with the femoral vessels through Hunter's canal, at 

 the lower end of which it crosses over the tendon of adductor 



