DISSECTION OF THE HEAD AND NECK 295 



Make the velum palatinum tense by means of a hook and 

 dissect the tunica mucosa off both its surfaces (oral and pharyn- 

 geal) and also off the arcus glossopalatinus and the arcus phar- 

 yngopalatinus. Observe the distribution of the glandulae pala- 

 tinae. 



Study the form, position, origin, insertion, action, and inner- 

 vation of each of the following : 



Muscles of the Palate and Fauces (Mm. palati et faucium). (Cf. Spalte- 

 holz, Figs. 551 and 552.) 



(a) Glossopalatine muscle (M. glossopalatinus) (0. T. palatoglossus). 



(b) Pharyngopalatine muscle (M. pharyngopalatinus) (0. T. palato- 



pharyngeus). 



(Observe here the salpingopharyngeal muscle (M. salpingo- 

 pharyngeus) ; it is really a part of the tunica muscularis 

 pharyngis.) 



(c) Muscle of uvula (M. uvulae) (0. T. azygos uvulae). 



Now remove the wall of the pharynx between the Eustachian 

 tube (tuba auditiva) above and the upper border of the M. con- 

 strictor pharyngis superior below. Study 



(d) Levator muscle of palatine curtain (M. levator veil palatini) (0. 



T. levator palati). 



(e) Tensor muscle of palatine curtain (M. tensor veil palatini} (0. T. 



tensor palati). Note especially the nerve supply of this muscle; 

 also the bursa M. tensoris veli palatini. What is meant by the 

 " palatal aponeurosis" ? 



Study also 



Arteries. 



(a) Ascending palatine artery (A. palatina ascendens) (0. T. inferior 



palatine). Of what is it a branch? Where have you met it 

 before ? 



(b) Pharyngeal rami of ascending pharyngeal artery (rami pharyngei 



A. pharyngeae ascendentis) (0. T. palatine branch of ascending 

 pharyngeal). 



(c) Descending palatine artery from internal maxillary artery (A. 



palatina descendens). 



Veins. 



(a) Pharyngeal veins (Vv. pharyngeae), from pharyngeal plexus 



(plexus pharyngeus) to V. jugularis interna. 



(b) Palatine vein (V. palatina), corresponding to A. palatina ascendens 



and emptying into V. f acialis anterior. 



Nerves. (Figs. 12S and 132.) 



(a) Branches of N. accessorius (through the rami pharyngei N. vagi) 



to the M. levator palati, M. uvulae, M. pharyngopalatinus, and 

 M. glossopalatinus. 



(b) Nerve of the palatine tensor (N. tensoris palatini), from motor 



part of N. trigeminus (through ganglion oticum) to the M. 

 tensor veli palatini. 



