THE SACRAL SYMPATHETICS 



pathetics. The inhibitory fibers to the heart probably terminate in the small ganglia 

 of the heart wall especially the atrium, from which inhibitory postgangl ionic fibers 

 are distributed to. the musculature. The preganglionic motor fibers to the esophagus, 

 the stomach, the small intestine, and the greater part of the large intestine are 

 supposed to terminate in the plexuses of Auerbach, from which postganglionic 

 fibers are distributed to the smooth muscles of these organs. Other fibers pass to 

 the smooth muscles of the bronchial tree and to the gall-bladder and its ducts. 

 In addition the vagus is believed to contain secretory fibers to the stomach and 

 pancreas. It probably contains many other efferent fibers than those enumerated 

 above. 



Greater superior petrosal 



Sphenopalatine ganglion 



Lacrimal 

 gland 



FIG. 841. Sympathetic connections of the sphenopalatine and superior cervical ganglia. 



Sympathetic Afferent Fibers of the Vagus, whose cells of origin lie in the jugular 

 ganglion or the ganglion nodosum, probably terminate in the dorsal nucleus of the 

 medulla oblongata or according to some authors in the nucleus of the tractus 

 solitarius. Peripherally the fibers are supposed to be distributed to the various 

 organs supplied by the sympathetic efferent fibers. 



THE SACRAL SYMPATHETICS. 



The Sacral Sympathetic Efferent Fibers leave the spinal cord with the anterior roots 

 of the second, third and fourth sacral nerves. These small medullated preganglionic 

 fibers are collected together in the pelvis into the nervus erigentes or pelvic nerve 



