THE SYMPATHETIC NERVOUS SYSTEM 353 



lingual nerve to end in the portion of the submaxillary ganglion 

 located on the submaxillary duct. 



Postganglionic neurons: Cells in a number of groups along the 

 chorda tympani fibers as they follow the submaxillary duct, fibers 

 distributed in branches to the submaxillary gland. 



Function : Increases secretion. 

 (&) Submaxillary thoracicolumbar pathway. 



Preganglionic neurons: Cells in the intermediolateral column of 

 the spinal cord, fibers by way of the upper white rami, and the sym- 

 pathetic trunk to end in the superior cervical ganglion. 



Postganglionic neurons: Cells in the superior cervical ganglion, 

 fibers by way of the plexuses on the external carotid and external 

 maxillary arteries to the submaxillary gland. 



Function: Increases secretion. 



3. Paths for the efferent inner vation of the heart: 

 (a) Cardiac craniosacral pathway. 



Preganglionic neurons: Cells in the dorsal motor nucleus of the 

 vagus, fibers through the vagus nerve to the intrinsic ganglia of the 

 heart, in which they end. 



Postganglionic neurons: Cells in the intrinsic cardiac ganglia, 

 fibers to the cardiac muscle. 



Function: Cardiac inhibition. 

 (&) Cardiac thoracicolumbar pathway. 



Preganglionic neurons: Cells in the intermediolateral column of 

 the spinal cord, fibers by way of the upper white rami and the sym- 

 pathetic trunk to the superior, middle, and inferior cervical ganglia. 



Postganglionic neurons: Cells in the cervical ganglia of the sym- 

 pathetic trunk, fibers by way of the corresponding cardiac nerves to 

 the musculature of the heart. 



Function: Cardiac acceleration. 



4. Paths for the efferent innervation of the musculature of the stomach 



exclusive of the sphincters (Fig. 250) : 

 (a) Gastric craniosacral pathway. 



Preganglionic neurons: Cells in the dorsal motor nucleus of the 

 vagus, fibers by way of the vagus nerve, to end in the intrinsic ganglia 

 of the stomach. 



