THE LIMBS OF THE HOESE 



105 



coarse fibres of the muscle cover the foramen, and are inserted into the 

 trochanteric fossa. 



M. ILIO-PSOAS. — The insertion of the ilio-psoasi muscle into the 

 lesser trochanter of the femur is now exposed. Its components (m. psoas 

 major and m. iliacus), and their origins, will be examined in the dis- 

 section of the abdomen and pelvis. 



N. OBTURATOMUS. — Two branches of the obturator nerve pierce the 

 external obturator muscle. The cranial branch furnishes nerves to the 



M. rectus femoris. 



il. pectineus. 



_M. obturator externus. 



M.fadductor. 



iJ . quadratus femoris, 

 il, biceps femoris. 



Al. seniitendintsus. M. semimembranosus. 



Fig. 70. — Ventral Aspect of the Hip Bone, with Areas of Muscular Attachment. 



adductor, pectineus, and gracilis muscles. The shorter caudal branch 

 supplies the adductor only. 



A. OBTUEATORiA. — The obturator may be regarded as the terminal 

 branch of the hypogastric artery. It traverses the obturator foramen 

 obliquely in company with the homonymous vein and nerve. Con- 

 tinuing between the ischium and external obturator muscle, it appears 

 at the caudal border of the muscle, and divides into a considerable 

 number of branches. These end in the biceps, semitendinosus, semi- 

 membranosus, adductor, and quadratus femoris muscles. In addition, 

 the obturator furnishes the deep artery of the penis (a. profunda penis). 

 Anastomoses are established with tlie deep femoral and posterior 

 femoral arteries. 



The oiturator vein (v. obturatoria) is a satellite of the artery. 



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