ANATOMY IN A NUTSHELL. 405 



the spheno-palatine foramen and then across the roof of the nose to the septum. 

 and from here it runs downward and forward beneath the mucous membrane 

 to the anterior palatine foramen. The naso-palatine nerve on the left side 

 passes through the anterior of the two foramina of Scarpa, while the one on the 

 right side passes through the posterior one. Here they supply the mucous 

 membrane behind the teeth and join the anterior palatine nerve, (g) The 

 pharyngeal branches, called pterygo-palatine, arise from the back of the gang- 

 lion and pass with the ptery go-palatine artery through the ptery go-palatine 

 canal to supply the mucous membrane of the upper part of the pharynx behind 

 the Eustachian tube, (h) The posterior superior nasal are a few small branches 

 which pass in the sheath of the vidian nerve to supply the mucous membrane 

 at the back part of the roof, septum, and superior meatus in the nose, and also 

 to the mucous membrane covering the end of the Eustachian tube. 



(3) The otic ganalion, sometimes called Arnold's, is reddish gray in color. 

 It is small and flat and situated under the foramen ovale on the inner surface 

 of the inferior maxillary nerve near the point where the motor and sensory 

 branches join. This ganglion has behind it the middle ni< ningeal artery. On 

 its inner side the cartilaginous portion of the Eustachian tube and the origin of 

 the Tensor palati muscle. This ganglion has three roots which are (a) its 



PLATE CCX VI 11. 



x= 



■" to sympathetic 



The Abdtjcens or Sixth Cranial Nerve. 



motor root which comes from the internal pterygoid branch of the inferior 

 maxillary division of the fifth, (b) its sensory root may come from the same 

 origin as the motor root, (c) its sympathetic root comes from the sympathe- 

 tic fibers from the middle meningeal plexus. (N. B.) Its motor root may 

 come from the facial nerve, and its sensory from the glosso-pharyngeal nerve 

 through the small superficial petrosal nerve and the tympanic plexus. 



Branches from this ganglion are (a) a filament passes backward on the 

 OUtei side of the Eustachian tube to the Tensor tympani muscle, (1>) a branch 

 passes to the Tensor palati muscle. Both of these branches are derived prin- 

 cipally from the interna] pterygoid nerve, (<•) Small branches pass to the 

 chorda tympani and buccal nerves. 



(4) The submaxillary ganglion is situated above the deep portion of the 

 submaxillary gland close to the posterior border of the Mylo-hyoid muscle. 

 This ganglion has three roots which are (a) its SYMPATHETIC ROOT is from the 

 plexus on the facial artery, (b) its motor root is from the chorda tympani of 

 the facial and (c) its sensory root is from the fifth nerve. This ganglion gives 

 off the following branches, (a) five or six small branches which supply the 



