6. Anterior c r u r a 1, 

 N. cruralis (ftmoralis), arises 

 from the loop between the 

 second, third and fourth 

 lumbar nerves, and is the 

 largest nerve of the lum- 

 bar plexus. It passes be- 

 tween the M. psoas and M. 

 iliacus interims through the 

 Lacuna muscularis to the 

 thigh and divides into cu- 

 taneous and muscular 

 branches. The former are : 



a) The middle cu- 

 taneous, N. cutaneus fe- 

 moris medius, perforates the 

 M. sartoriiis and passes to 

 the middle of the anterior 

 surface of the thigh. 



b) The internal cuta- 

 neous, N. cutaneus femoris 

 internus, pierces the Fascia 

 lata in the middle of the 

 thigh, communicates with the 

 anterior branch of the ob- 

 turator nerve, and passes to 

 the inner side of the thigh. 



c) The long or inter- 

 nal saphenous, N. saplie- 

 nus major, passes down with 

 the femoral artery to the 

 opening in the adductor 

 tendon, and runs between 

 M. vastus inter uus and M. 

 adductor magnus to the in- 

 ner side of the knee-joint. 

 Behind the tendon of the 

 sartorius it passes through 

 the Fascia lata and accom- 

 panies the internal saphe- 

 nous vein down to the foot. 

 It gives off the N. cutaneus 

 surae internus to the calf 

 of the leg, passes to the 

 inner border of the foot, 

 where it supplies the inte- 

 gument and communicates 

 with the internal branch of 

 the musculo-cutaneous nerve. 



Spinal Nerves. 



SACRQ 



159 



N. OBTURAT. 



PUDEND 



0. SAPHEN 

 IYIAJ. 



M. sartor. 



HN.TIBIAL 



0. 5AFHEN 



503. The Anterior Crural Nerve. 



