NERVUS FACIALIS OF ALBINO MOUSE 



117 



vagus to leave the facial stem as a separate branch just distal to 

 the anastomosis (fig. 11). Fibers from the bundle in the facial 

 stem pass into the auricular branch of the vagus proximal to the 

 anastomosis. At the anastomosis there is an interchange of 

 fibers between the auricular branch of the vagus and the cutan- 

 eous fibers in the facial stem. This interchange is shown in 

 figure 13. 



'N.Stap, 



N.foSly-lif 



N.ToSry-Hy. 

 to Diu 



Figs. 11 and 12 Outline drawings of a blotting-paper model of the nervus 

 facialis showing its relation to the ramus auricularis vagi and the branches arising 

 above and behind the tympanic cavity. Figure 11 is a lateral and slightly pos' 

 terior view of the model; figure 12 a medial and posterior view of it. X 33. 



After the cutaneous branch of the facial and the auricular 

 branch of the vagus have separated from the facial stem, each 

 nerve contains fibers from the other. Because the greater pro- 

 portion of the fibers of one nerve come from the facial, it is con- 

 sidered as a branch of that nerve, the other for the same reason 

 being considerefl as a branch of the vagus. 



