u8 



PRACTICAL ANATOM\. 



To what is the nasal nerve distributed? 



To the septum, to the outer part of the nose, and to the two lower turbinals. 

 This is a sensory nerve, a branch of the ophthalmic division of the fifth. It is 

 found in the cranial, orbital, and nasal cavities. It traverses the anterior eth- 

 moidal foramen and the nasal slit. 



Where is the olfactory nerve distributed ? 



To the roof of the fossa ; to the superior and middle turbinals ; to the upper 

 half of the septum nasi. (Fig. 75.) 



Where is the spheno-palatine or Meckel 's ganglion ? 



In the spheno-palatine fossa, under the second division of the fifth nerve. 

 It is the source from which the nose and mouth and palate derive their nerve- 

 supply in great part. (Fig. 75.) 



Tlie sensory root of Meckel' s comes from the second division of the fifth, 

 called the spheno-palatine nerves. (Fig. 53.) 



The motor root comes from the seventh or facial nerve, through the large 



FRONTAL SINUS 



NASAL PROCESS OF MAXILLA 

 LACHRYMAL 



LACHRYMAL CANAL 



ORIFICE OF ANTRUM 



INFERIOR TURBINAL 



PALATE BONE 



ANTERIOR NASAL SPINE 



ANTERIOR ETHMOID CANAL 

 POSTERIOR ETHMOID CANAL 

 OPTIC FORAMEN 



OS PLANUM OF ETHMOID 



SPHENO-PALATINE FORAMEN 

 VIDIAN CANAL, LEADING INTO THE 



SPHENO-MAXILLARY FOSSA 

 SPHENOID 



EXTERNAL PTERY60ID PLATE 

 PALATE BONE 



FIG. 80. A SECTION OF THE SKULL, SHOWING THE INNER WALL OF THE ORBIT, THE BASE OF 

 THE ANTRUM, AND THE SPHENO-MAXILLARY FOSSA. 



superficial petrosal. This you can see in a groove under the dura, on the 

 anterior surface of the petrous portion of the temporal bone. The nerve passes 

 behind the Gasserian ganglion, down through the sphenotic foramen. It joins 

 here, at the base of the skull, the large, deep petrosal branch of the carotid 

 plexus. The two now pass through the Vidian canal. The result of the union 

 of the large superficial petrosal of the seventh nerve and the large, deep petrosal 

 of the carotid plexus is the Vidian nerve. (Fig. 53.) The last is the sympathetic 

 root. 



Name the brandies given off by Meckel' s ganglion. (Fig. 53.) 

 (i) Branches to the orbital periosteum; (2) branches to the mucous mem- 

 brane of the nose; (3) anterior palatine to the roof of the mouth (Fig. 55) ; 

 (4) naso-palatine in groove on nasal septum ; (5) branches to the upper pharynx 

 behind luistachian tube. 



I introduce here, by consent of the author, some conclusions on the opening 

 of the infundibulum in relation to the opening for the antrum of Highmore. I 

 have given no special attention to the subject in the dissecting-room ; still, inci- 



