THIGH AND BUTTOCK. 



Gluteus medius and minimus, the upper one along the origin 

 of the Gluteus minimus and the other lower down. [850] 



Visceral Branches of Anterior Division. Superior, middle, 

 and inferior vesical, to the bladder; obliterated hypogastric, to 

 the bladder and abdominal wall; artery to the vas; middle 

 hemorrhoidal, to the rectum ; uterine and vaginal, to the uterus 

 and vagina. [851] 



Parietal Branches of Anterior Division. The obturator runs 

 along the pelvic wall just below the brim and through the ob- 

 turator foramen, and then divides into two branches, external 

 and internal; these skirt round the margins of the foramen 

 upon the obturator membrane, under the Obturator externus. 

 Its pelvic branches are muscular; nutrient, to the ilium ; vesi- 

 cal, to the bladder; and pubic, ascending on the back of the pu- 

 bis and sometimes passing on the inner side of the crural ring. 

 The internal pudic runs through the great sacro-sciatic foramen 

 below the Pyriformis, across the ischial spine, and with the 

 pudic nerve through the small sciatic foramen to the perineum ; 

 there it runs along the wall of the ischio-rectal fossa in Alcock's 

 canal, and then along the pubic ramus between the layers 

 of the triangular ligament. Its branches in the buttock are mus- 

 cular and anastomotic; those in the perineum have been de- 

 scribed (page 211). The sciatic runs through the great sacro- 

 sciatic foramen below the Pyriformis and descends with the 

 great sciatic nerve to the lower border of the Gluteus maxi- 

 mus, and then with the small sciatic nerve. Its branches in the 

 buttock are muscular; coccygeal, to the back of the coccyx; 

 anastomotic, to the crucial anastomosis; cutaneous; and comes 

 nervi ischiatici, to the great sciatic nerve. [852] 



External Iliac. Beginning at the lumbo-sacral joint, this 

 runs along the pelvic brim upon the iliac fascia and becomes the 

 femoral artery under Poupart's ligament, midway between the 

 pubic symphysis and anterior superior iliac spine. It lies ex- 

 ternal to the vein and both are enclosed in a thin sheath. Its 

 branches are: twigs to the Psoas and glands; deep epigastric, 

 19 [ 289 ] 



