DISSECTION OF THE HEAD AND NECK 303 



(ka) Olfactory glands (Gl. olfactoriae) . 

 (kb) Nasal glands (GL nasales). 



Force the concha media upward and backward and examine 

 (1) Ethmoidal infundibulum (infundibulum ethmoidale). 



(la) Semilunar opening (hiatus semilunaris) . 

 (m) Ethmoidal "bubble" (bulla ethmoidalis) . 



Where are the ethmoidal cells (cellulae ethmoidales) and how do 

 they communicate with the nose? 

 (n) Sinuses near nose (sinus paranasales) . 



(na) Maxillary sinus (sinus maxillaris [Highmori]) (0. T. antrum 

 of Highmore). 



Open this by removing its lateral wall. How does it 

 communicate with the nose? 

 (nb) Sphenoidal sinus (sinus sphenoidalis) . 

 (nc) Frontal sinus (sinus front alis). 

 (o) Nerves of lateral wall of nose. (Fig. 132.) 

 (oa) Olfactory nerves (Nn. olfactorii). 



(ob) Anterior nasal rami of ethmoidal nerve (rami nasales ante- 

 rior es}. 

 (oba) Internal nasal rami (rami nasales interni). 



(obaa) Lateral nasal rami (rami nasales later- 

 ales). 



(obb) External nasal ramus (ramus nasalis externus). 

 (oc) From ganglion sphenopalatinum. 



(oca) Lateral superior posterior nasal rami (rami nasales 



posterior es superior es laterales). 

 (ocb) [Lateral] inferior posterior nasal rami (rami nasales 



posterior es inferiores [laterales]). 

 (od) Internal nasal rami (rami nasales interni), from anterior 



superior alveolar rami of N. infraorbitalis). 

 (p) Arteries of lateral wall of nose. 



What is the arterial supply here? Work out the large branches. 



SPHENOPALATINE GANGLION (GANGLION SPHENO- 

 PALATINUM) (0. T. MECKEL'S GANGLION). 



The lateral posterior nasal rami (superior and inferior) have 

 already been found; follow them back to the pterygopalatin'e 

 canal (canalis pterygopalatinus) (0. T. posterior palatine 

 canal) ; open this canal thoroughout its length and follow the 

 palatine nerves (Nn. palatini) upward to the sphenopalatine 

 ganglion which lies in the pterygopalatine fossa (fossa pterygo- 

 palatina) (0. T. sphenomaxillary fossa). In connection with 

 the ganglion sphenopalatinum study the following: 



(a) Orbital rami (rami orbitales). 



(b) Nerve of the pterygoid canal, or Vidian nerve (N. canalis pterygoidei 



[Vidii]). 



