44 THE POCKET ANATOMY 



Branches of communication or roots : 



Long or sensory root : from the nasal of the ophthalmic, joins 

 posterior superior angle. 



Short or motor root : from the branch of the 3rd nerve sup- 

 plying inferior oblique, joins posterior inferior angle. 



Sympathetic : from the cavernous plexus, and frequently 

 joined with the long or sensory root. 



Branches of distribution : 



Short Ciliary Nerves : Ten or twelve given off in two bundles, 

 large inferior and small superior. Pass forwards above and 

 below optic nerve, with long ciliary of nasal. The branches 

 subdivide and, piercing sclerotic, run in grooves on its internal 

 surface 10 end in ciliary muscle and iris. The circular fibres 

 of the iris and the ciliary muscle are innervated by the third 

 nerve, the radial fibres of the iris by the sympathetic. 



The SUPERIOR MAXILLARY NERVE (sensory) passes from the 

 middle of the Gasserian ganglion through foramen rotundum, 

 then across spheno-maxillary fossa to enter the infra-orbital 

 canal, and here receives the name of infra- orbital. Emerging 

 on the face from the infra-orbital foramen under the levator 

 labii superioris, it divides into a number of branches, nasal, 

 palpebral and labial, and joins with branches of the facial 

 nerve to form the infra-orbital plexus. 



Branch in the Skull : 



Recurrent : given off near origin to dura mater. 



Branches given of in the Spheno -maxillary fossa : 



Orbital ortemporo-malar: enters orbit by spheno-maxillary 

 fissure and directly divides into : 



Temporal: passes along groove in oufer wall of orbit, here 

 communicating with the lachrymal : it then goes through 

 a foramen in the malar bone, and, entering the temporal 

 fossa, passes anterior to the temporal muscle : piercing the 

 temporal aponeurosis, it becomes cutaneous, and inosculates 

 with branches from the facial nerve. 



Malar: passes to lower and outer angle of orbit, goes 

 through malar foramen, and communicating with the facial 

 becomes cutaneous. 



Spheno-palatine (2) descend to Meckel's ganglion. 



Posterior superior dental: comes off just before nerve enters 

 canal, and divides into : 



External branch : passes downwards to the 'gums. 



Internal branch : enters a canal in the superior maxilla, and 

 runs along outer wall of antrum ; supplies the molar teeth 

 and mucous membrane of the antrum. Communicates with 

 middle superior dental. 



