ORIGIN OF CEREBRAL NERVES. 321 



10. Vagus (Sensory Root}. 



Jugular and nodular Posterior lateral sulcus Nucleus alae cinereae, and 

 ganglia in jugular of medulla. perhaps nucleus tractus 



foramen and below it. solitarii, in medulla. 



TABLE m. 



MOTOR NERVES AND MOTOR ROOTS. 

 Genetic Nucleus. Apparent Origin (Exit from Brain). 



3. Oculomotor (Motor Nerve). 



Nucleus in floor of cerebral aqueduct Interpeduncular fossa of mid-brain, 

 in mid-brain under superior collic- 

 ulus. 



4. Trochlear (Motor Nerve). 



Nucleus in floor of cerebral aqueduct Superior medullary velum in isthmus 

 in mid-brain under inferior collie- rhombencephali. 

 ulus. 



5. Trigeminal (Motor Root). 



Nucleus in floor of cerebral aqueduct Anterior surface of pons. 

 in mid-brain and under locus caer- 

 uleus of pons. 



6. Abducent (Motor Nerve). 



Nucleus under colliculus facialis in Groove between pons and medulla, 

 pons. 



7. Facial (Motor Nerve). 

 Nucleus under fovea superior in pons. Groove between pons and medulla. 



Intermediate (Efferent Part, Secretory). 

 Dorsal part of facial nucleus in pons. Groove between pons and medulla. 



9. Glossopharyngeal (Motor Root). 



Nucleus alae cinereae and nucleus am- Posterior lateral sulcus of medulla, 

 biguus in the medulla. upper end. 



10. Vagus (Motor Root). 



Same as ninth, but chiefly nucleus Posterior lateral sulcus below ninth, 

 ambiguus. and between olive and restiform 



body. 



