306 SPECIAL ANATOMY. 



2. Branches for the glands and mucous membrane of the palatine vault. 



3. Ram. nasalis enters through can. palatinus anter. into the nasal cavity. 

 o. Art. spheno-palatina s. nasalis posterior, the terminal branch of Art. 



maxill. intern., passes, curved, transversely inwards through foram. spheno-pa- 

 latinum into the nasal cavity, and divides behind the superior nasal chamber 

 into: 



1. Art. septi narium s. nasopalatina, which passing obliquely inwards, 

 downwards, and forwards, between the nasal septum and mucous mem- 

 brane, it divides into a superior and inferior branch, and anastomoses 

 with art. palat. super, in the canalis incisivus. 



2. Art. nasalis posterior, enters behind the middle concha into the nose, 

 descends upon the internal surface of the palate bone forwards, perfo- 

 rates the inferior concha, and enters the inferior nasal chamber. 



3. Art. pharyngea descendens passes in a canal (internal to vidian) at the 

 base of proc. pterygoid. backwards to the superior part of the nasal 

 cavity and the pharynx. 



Art. maxillaris interna, thus sends branches : 



1. To the organs of mastication, as : Artt. dentales, infraorbitalis; masse- 

 terica, temporal, profunda ant. and post, pterygoidea. 



2. To the organs of deglutition : Artt. palatina super., vidiana, pha- 

 ryngea. 



3. To the cavities of the nose : Artt. infraorbitalis, spheno-palatina. 



4. To the organs of audition : Art. tympanica, auricularis prof., rami art. 

 meningece mediae. 



5. To the face : Artt. buccinatoria, infraorbitalis, mentalis. 



6. To the cranial cavity : Art. meningea media. 



550. II. Carotis interna s. Cerebralis, the internal 

 Cranial Artery. 



It supplies the anterior portion of the brain and the eye. Course : 

 from the point of separation of the carotis communis as high as 

 the m. digastricus (posterior belly), almost parallel with carotis 

 externa and a little curved ; thence to the entrance into the canal, 

 caroticus deeper backwards and inwards, in a triangular space be- 

 tween pharynx and ram. maxill. infer. ; before the entrance ho- 

 rizontal. In the canal, caroticus it makes four curvatures, as at 

 first it ascends vertically, then passes (first curve) horizontally for- 

 wards and inwards as far as sinus cavernosus to the apex of the 

 temporal bone, comes forth and (second curve) ascends at a right 

 angle by the side of sella turcica, passes again horizontally (third 

 curve) as far as proc. clinoid. anter. > and (fourth curve) perforates 

 the dura Mater obliquely upwards, backwards, and somewhat in- 

 wards, on the outer side of the optic nerves. Situation : in the 



