ILIO-HYPOGASTRIC NERVE 



193 



the second and third nerves,, branches are given off, which join 

 to form the external cutaneous nerve. Before these divisions 

 take place branches are given off from the lumbar nerves to 

 supply quadratus lumborum and psoas. 



Ilio-Hypogfastrie Nerve, formed by the branch from th* 

 twelfth thoracic nerve and the upper part of the first lumbar 

 nerve. It emerges from psoas, and passes between the trans- 



I2.T. 



DORS.LUMB.N. 



'----._ Lumbo-sacral Cord 



FIG. 68. LUMBAR PLEXUS. 



versalis and obliquus internus muscles above the crest of tho 

 ilium, and becomes cutaneous in the lower part of the anterior 

 abdominal wall. 



Branches. Muscular to abdominal muscles. 



Cutaneous. Iliac branch which corresponds to the lateral 

 cutaneous branches of the thoracic nerves, and supplies the skin 

 over the upper part of the buttock. Hypogastric branch, which 

 supplies the skin over the pubis. 



13 



