512 NEUEOLOGY. 



oE ilio-muscular and ischio-'niuscular or lesser sciatic branches, 

 and terminates as the great sciatic nerve. 



The Iliaco-muscular are numerous small branches, the chief 

 of which accompany the iliaco-muscular artery across the iliacus 

 muscle. 



The Crural or Anterior Femoral nerve is the largest 

 branch of the anterior division. It descends between the psoas 

 magnus and psoas parvus, and passing under the sartorius, enters 

 between the rectus femoris and vastus internus, distributing 

 branches to these muscles. Near the groin, it gives off the 

 internal sajjhenic nerve, which accompanies the femoral artery 

 for some little distance, then passes between the sartorius and 

 gracilis, becoming subcutaneous, and passing down the limb, in 

 company with the internal saphena vein, and, on the inner face 

 of the leg, it is continued to the hock, and by delicate branches 

 as far as the fetlock and pastern. Another long subcutaneous 

 branch is given off, which breaks up and surrounds the saphenic 

 artery and vein. These branches furnish filaments to the stiHe, 

 to the adductor and pectineus muscles, and to the skin of the 

 anterior and inner part of the leg. 



The Obturator nerve, situated at first under the peritoneum, 

 accompanies the obturator artery through the obturator foramen, 

 and gaining the muscles on the internal face of the thigh, ter- 

 minates in the obturator externus, adductors, pectineus, and 

 gracilis, also giving twigs to the obturator internus. 



The Ilio-muscular or Anterior Gluteal nerves four or 

 five in number, leave the pelvis through the gi'eat sciatic notch. 

 The principal branch loses itself in the gluteus maximus, another 

 crossing the neck of the ilium, above the gluteus internus, is 

 directed outwards, and distributed to the tensor fasciae latfe. 

 Another passes to the gluteus internus, in the substance of which 

 it terminates. 



The IscHio-MUScuLAR or Posterior Gluteal nerves are the 

 superior and inferior. The first, the course of which lies through 

 the sciatic notch, and between the sacro-sciatic ligament and the 

 gluteus maximus muscle, to the posterior portion of which it gives 

 a small branch in passing, and sends another to the gluteus 

 externus, terminating by numerous branches in the triceps 

 abductor muscle. The second is situated below the preceding, 

 and supplies the biceps rotator tibialis muscle and skin of the 

 posterior part of the haunch. 



