776 



THE NERVOUS SYSTEM. 



with the lacriinal nerve, and passes through the zygomatico-orbital foramen in the 

 zygomatic bone, where it divides into two branches. The zygomatico-facial (O.T. 

 malar) branch appears on the face, after traversing the zygomatic bone, and supplies 



Lacrimal gland 



Frontal nerve 



Supra-orbital nerve 



Lacrimal nerve 



Nerves to superior rectus and 

 levator palpebne from oculo- 

 motor nerve (superior division) 



Trochlear nerve - 



Rectus lateral! s 



Abducens nerve 



Oculo-motor nerve 

 (inferior division) 



Ciliary ganglion 



Nerve to rectus inferior from 

 oculo-motor nerve 



Nerve to obliquus inferior 

 from oculo-motor nerve 



Supra-trochlear nerve 

 Levator palpebrse superioris 

 Rectus superior 

 Obliquus superior 

 Naso-ciliary nerve 

 Infra-trochlear nerve 



Rectus medialis 



Nerve to rectus medialis from 



'oculo-motor 



Ophthalmic artery 



Optic nerve 



Long ciliary nerves 



Rectus inferior 



Obliquus inferior 



FIG. 652. SCHEMATIC REPRESENTATION OF THE NERVES WHICH TRAVERSE THE CAVITY OF THE ORBIT. 



the skin over that bone. It communicates with the zygomatic branches of the 

 facial nerve. The zygomatico-temporal (O.T. temporal) branch perforates the temporal 

 surface of the zygomatic bone, and is distributed, after piercing the temporal fascia, 



Ophthalmic nerve 

 Maxillary nerve 

 Semilunar ganglion ^ 

 Trigeminal nerve | 



(afferent root) 



Mandibular 

 nerve 



Communication with lacrimal nerve 

 Frontal nerve | 



Lacrimal nerve 

 Naso-ciliary nerve v 



Maxillary nerve 

 Pharyngeal nerve 

 Nerve of pterygoid canal 

 Spheno-palatine ganglion 



Palatine nerves 

 Posterior superior alveolar nerves 



Zygomatic nerve 1M 

 Infra-orbital nerve, entering canal 



Supra-orbital nerve 

 Supra-trochlear nerves 



Sensory root from maxillary. nerve 



Sensory root from maxillary 

 nerve 



_,-- Zygomatico-temporal branch 

 Infra-trochlear nerve 



Zygomatico-facial branch 



Inferior palpebral branch 

 External nasal nerves 

 Infra-orbital nerve, 

 leaving canal 

 External nasal 

 branch 



Superior labial branches ^ 



FIG. 653. THE COURSE OF THE OPHTHALMIC AND MAXILLARY NERVES. 



to the skin over the anterior part of the temple. It communicates with th( 

 temporal branches of the facial nerve. It may be very minute, and not 

 further than the temporal fascia, between the two layers of which it may form s 

 communication with the facial nerve. 



