THE STOMACH 251 



rami (primary divisions) are involved, similar areas may be 

 found in the sacro-spinalis (erector spinae). 



(b) The two vagus nerves enter the abdomen through the 

 oesophageal opening in the diaphragm and break up to form 



[Photo by Alinari. 

 FIG. 96. The Nerve-supply Oi the Anterior Aspect of the Trunk. 



plexuses on both surfaces of the stomach. Some small twigs 

 from these plexuses pass to the liver and the small intestine. 



Afferent impulses from the stomach may pass through the 

 sympathetic to the spinal medulla or they may be carried by 

 the vagi to the medulla oblongata. When a lesion of the 



