Special somatic afferent _ 



nucleus 

 General somatic afferent 



nucleus 

 Alar lamina' 

 Visceral afferent nucleus- 

 General visceral efferent__ 



nucleus 

 Special visceral efferent 



nucleus 

 Basal lamina" 



Somatic efferent nucleus *~ 



Somatic muscle 



Sympathetic ganglion 



Visceral mucous membrane 



Smooth muscle 



XN Sensory ganglion 

 Branchial muscle 



Fig. 119. 



Sensor v nucleus N. V* 



V 



Nucleus of abducens nerve\ \ 



Facial nerve, \ 

 Vestibular nuclei \ \ 



\ ' 



Vestibular ganglion 

 and nerve 



DC 



Bulbar rootlet of accessory nerve 



Spinal root of accessory nerve'' 



Nucleus ambiguus-' 



Tractus solitarius 



Nucleus of Edinger-Westphal 

 Nucleus of oculomotor nerve 



Nucleus of trochlear nerve 

 M esencephalic nucleus N. V 



Trigeminal nerve 

 and semilunar 

 ganglion 



r . Spinal tract and 

 nucleus N. V 



. Cochlear nuclei 



Spiral ganglion 

 and cochlear 



.. Glossopharyn- 



geal nerre 

 Vagus nerve 



. salivatorius superior 

 '. salivatorius inferior 

 Dorsal motor nucleus N. X 



Cervical spinal nerve 



Fig. 120. 



Figs. 119 and 120. Diagrams showing the origin, course, and termination of the functional 

 components of the cranial nerves. Somatic afferent and efferent, red; visceral afferent, yellow; 

 general visceral efferent, black; special visceral efferent, blue. Fig. 119 shows the locations of the 

 several functional cell columns in a section through the medulla oblongata of a human embryo and 

 the peripheral terminations of the several varieties of fibers. Fig. 120, dorsal view of the human 

 brain stem, showing the location of the nuclei and the intramedullary course of the fibers of the 

 cranial nerves. 169 



