146 THE POCKET ANATOMY 



communicating with the large palatine nerve, ends in the 

 gums of the incisor teeth. Branches are given to the mucous 

 membrane over the septum. 



Posterior. 



The Vidian nerve, really formed by two roots of the ganglion, 

 passes backwards through Vidian canal, here giving off the 

 upper posterior nasal branches to the back part of the roof of the 

 nose. On emerging from the canal it divides in the foramen 

 lacerum medium into a large deep petrosal nerve, which joins 

 the sympathetic on the carotid artery, and a large superficial 

 petrosal nerve, which runs along a groove on the petrous bone 

 to the hiatus Fallopii, and, passing into the Fallopian aque- 

 duct, joins the geniculate ganglion on the facial nerve. As 

 the motor root of Meckel's ganglion, it may be traced forwards 

 from facial nerve. 



Thepharyng al nerve, which may come off from the ganglion, 

 or from the Vidian nerve, enters pterygo-palatine canal and 

 ends in the mucous membrane of the palate, near the 

 Eustachian tube. 



The INFERIOR MAXILLARY NERVE is the largest of the three 

 divisions of the 5th. The large sensory root comes from the 

 inferior angle of the Gasserian ganglion, which root is joined 

 on its deep aspect near or in the foramen ovale by the small 

 motor root from the trunk of the 5th nerve. The united 

 nerve leaves skull by foramen ovale, and immediately divides 

 into anterior and posterior trunks. 



Branches from the trunk : 



Recurrent : passes backwards with the middle meningeal 

 artery, through foramen spinosum, to supply dura mater. 



Internal pterygoid : to deep surface of internal pterygoid, 

 connected near origin with otic ganglion. 



Branches from the anterior (small and chiefly motor} division: 



Masseteric : passes outwards with posterior deep temporal 

 nerve above external pterygoid, then over sigmoid notch with 

 artery, to deep surface of masseter and gives twigs to temporo- 

 maxillary joint. 



Deep temporal (3) : anterior, from the buccal nerve, to supply 

 front of temporal muscle; middle, passes above external ptery- 

 goid to deep part of temporal muscle ; posterior, often united 

 with masseteric nerve, to back part of temporal muscle. 



Buccal (sensory) : comes out between heads of external 

 pterygoid to reach buccinator, and is frequently joined to 

 the anterior temporal and external pterygoid nerves ; com- 

 municates with facial, and is distributed to mucous membrane 

 and skin of cheek. 



