THE TRIGEMINAL NERVE 



67 



pathetic fibres which join the semilunar (Gasserian) ganglion, 

 and they are destined for the dilatator iridis. The ciliary 

 ganglion contains some nerve-cells which form a peripheral 

 controlling centre for the light reflex. Degenerative changes 

 have been found in the ganglion in cases showing a typical 



FIG. 38. The Branches of the Maxillary Nerve. 



1. Semilunar (Gasserian) ganglion. 



2. Ophthalmic nerve. 



3. Maxillary nerve. 



4. Zygomatic nerve. 



5. Branch communicating with lacri- 



mal nerve. 



6. Zygomatico-facial nerve. 



7. Zygomatico-temporal nerve. 



8. Spheno-palatine ganglion (of Meckel). 



9. Nerve of pterygoid canal (Vidian). 

 10. Greater superficial petrosal nerve, 

 n. Facial nerve. 



12. Deep petrosal nerve. 



13. Palatine nerves. 



14. Posterior superior alveolar (dental) 



nerve. 



15. Infra-orbital nerve. 



"Argyll-Robertson pupil" (p. 54). The short ciliary nerves 

 arise from the ganglion and proceed forwards to the eyeball. 



The various pathological conditions affecting the ophthalmic 

 nerve are indicated on page 77. 



2. The MAXILLARY NERVE is, like the ophthalmic, a purely 

 sensory nerve. From the semilunar (Gasserian) ganglion 

 it runs forwards on the floor of the middle cranial fossa, 



