500 



APPLIED ANATOMY. 



the anterior superior spine, and at its posterior extremity the posterior superior 

 spine. Its large flat portion, called the ala, gives origin from both its inner and 

 outer sides to muscles running to the thigh below. The glutei muscles are attached 

 to its outer surface and the iliacus to its inner. Immediately below the anterior 



Crest 



Dorsum of ilium 

 Anterior superior spine 



Anterior inferior spine 



Cotyloid notch 



Iliopectineal line 



Horizontal ramus of pubis 



Spine of pubis 



Descending ramus of pubis 



Superior gluteal line 



Inferior gluteal line 



Posterior superior spine 



Posterior inferior spine 

 Greater sacrosciatic notch 

 Acetabulum 



Spine of ischium 

 Lesser sacrosciatic notch 



Tuberosity of ischium 



Ramus of ischium 

 Obturator toramen 

 FIG. 500. The innominate bone, viewed from the outside. 



superior spine is the anterior inferior spine ; to it is attached the rectus femoris 

 tendon. The ischium is below and behind the acetabulum; its tuberosity gives 

 attachment to the hamstring muscles biceps (outer), semitendinosus, and semi- 

 membranosus (inner). Along the inner surface of the ramus of the ischium, in a 



.Crest 

 Ilium (ala) 



Anterior superior spine 

 Anterior inferior spine 



Greater sacrosciatic notch 



Spine of ischium 

 Lesser sacrosciatic notch - 



Ischium 



Tuberosity of ischium 



Groove for pudic vessels and nerve 

 Obturator foramen 



Iliopectineal line 

 Horizontal ramus of pubis 



Spine of pubis 

 Body of pubis 

 Crest of pubis 

 Symphysis of pubis 



Descending ramus of pubis 



FIG. 501. The innominate bone, viewed from the inside. 



fibrous canal (Alcock's), run the internal pudic vessels and nerve on their way to 

 the perineum. They lie 4 cm. (i^ in.) from the surface. The pubis lies below 

 and anterior to the acetabulum. Its upper inner edge forms the iliopectineal 

 line, which is continued back to form the brim of the true pelvis. The superior or 



