102 OUTLINES OF ANATOMY. 



Strip the peritoneum from the under surface of the diaphragm and expose that muscle. 



Diaphragm, 423-4-5. (419-20*-!) 



Origin : Anterior or sternal portion. 

 Lateral or costal portion. 

 Posterior or vertebral portion : 



Ligamentum arcuatum externum. 

 Ligamentum arcuatum internum. 

 Crus ; right side, left side. 

 Insertion. 

 Structure : Central tendon. 



Foramina. 



Nerve-supply. Action. Relations. Variations. 

 Iliac fascia, 368-9. (368) Lumbar fascia, 434. (430) 



Carefully reflect the fascia from the surface of the psoas, iliacus, and quadratus lumborum. In reflect- 

 ing the fascia, avoid injuring the branches of the lumbar plexus crossing these muscles. 



Psoas magnus, 366-7. (365-6-7) 



Origin : Inner part. Outer part. 



(Insertion.) Structure.' Nerve-supply. Action. Relations. Variations. 

 Psoas parvus, 368. (367-8) 



Origin. Insertion. Structure. Nerve-supply. Action. Relations. 

 Iliacus, 368. (367) 



Origin. (Insertion.) Structure. Nerve-supply. Action. Relations. Variations. 



Carefully expose Ihe branches of the lumbar plexus, tracing them from their origin to the point of exit 

 from the abdominal cavity. To expose the nerves at their origin it will be necessary to dissect away a 

 portion of the psoas muscle. 



Lumbar nerves, 846. (826) 

 Lumbar plexus, 846-7. (827-8-9) 

 Branches : 



Ilio-hypogastric nerve, 848. (829) 



Ilio-inguinal nerve, 849. (829) 



Genito crural nerve, 849. (829) 



External cutaneous nerve, 851. (832) 



Anterior crural nerve, 851-2. (832) 

 Nerves to the iliacus. 



Obturator nerve, 849. (829-30) 



Accessory obturator nerve, 850. (831-2) 



Quadratus lumborum, 435-6. (431) 



Origin. Insertion. Structure. Nerve-supply. Action. Relations. 

 Last thoracic nerve, 846. (826-7) 

 Subcostal artery or twelfth dorsal, 583. (572-3) 

 Subcostal vein or twelfth thoracic vein, 645. (633) 

 Lumbar arteries, 587-8. (576) 



Muscular branches. Renal branches. 



Variations. 



Lumbar veins, 671-2. (657-8) 

 Anterior branches. 

 (^Posterior branches.) 



The Pelvic Viscera. 



Revinu the relations of tht peritoneum in the pelvic cavity and note the plan of formation of the peri- 

 toneal ligaments. 



Recto-vesical pouch, 992. (971) 

 Bladder : 



Peritoneum, false ligaments, 1056. (1034) 



