THE LUMBAR NERVES 



997 



rami with a lumbar sympathetic ganglion. The first three nerves and the greater 

 part of the fom-th enter into the formation of the lumbar plexus, and the smaller 



Fig. 763. — Cutaneous Nerves of the Thorax and Abdomen, viewed from the Side. 



(After Henle.) 



Pectoralis major 



Supraclavicular branch 

 cervical plexus 



Pectoralis minor 



Sheath of rectus 



Anterior cutaneous 

 of last thoracic 



Ilio-hypogastric 



Ilio-ingixinal 



-Brachial plexus 



Intercosto -brachial 



~ Latissimus dorsi 



Serratus anterior 



External oblique 



Lateral cutaneous of last 

 thoracic nerve 



part of the fourth and the fifth nerve commonly unite to form the lumbo-sacral 

 cord which takes part in the formation of the sacral plexus (figs. 764, 765). When 

 the fourth nerve enters into the formation of both lumbar and sacral plexuses, 



