212 INFERIOR EXTREMITY 



brevis. Anterior to it are the pectineus and adductor longus 

 muscles. It gives branches to three muscles, viz. the adductor 

 longus, the adductor brevis, and the gracilis. Very rarely it 

 will be observed to supply a twig to the pectineus. In addi- 

 tion to these it supplies an articular branch to the hip-joint 

 (Fig. 80, x ) a fine twig, which appears at the distal border of 



Femoral nerve (O.T. ant. crural) 



Lumbo-inguinal nerve 

 Femoral sheath \ 

 Femoral canal '.<S^&& 

 Obturator artery 

 Obturator nerve 

 M. adductor longus 



FlG. 8 1. Dissection to show the Structures surrounding the Obturator 

 Foramen of the Hip Bone. 



the adductor longus, to join the sartorial plexus (Fig. 80); and 

 a terminal twig which goes to the femoral artery (Fig. 80) 

 and breaks up into fine filaments upon its walls. 



The posterior branch of the obturator nerve, as it enters the 

 thigh, pierces the upper border of the obturator externus. It 

 extends distally, between the adductor brevis and the 

 adductor magnus, and is chiefly expended in the supply 

 of the latter muscle. It gives also, however, a branch to 

 the obturator externus and an articular branch to the knee- 



