ORGANS OF SPECIAL SENSE. 



355 



SUPERIOR OBLIQUE. Origin, from inner margin of optic 

 foramen. Its tendon passes through a pulley near the internal 

 angular process of the frontal bone; insertion, into sclerotic 

 between external and superior recti, midway between entrance of 

 optic nerve and the cornea; action., rotates the eyeball on its 

 axis; nerve, fourth, or patheticus. 



INFERIOR OBLIQUE. Origin, orbital plate of superior 

 maxilla; insertion, near that of superior oblique, between ex- 

 ternal and superior rccti; action, rotates the eyeball on its axis; 

 nerve, third cranial. 



Supra-orbital _ 



Lacrimal 

 Muscular and ciliary 



Anterior meningeal 

 Ophthalmic 



Superior rectn 

 Levator palpebrse superioris 



Nasal 



Anterior ethmoidal 

 Muscular trunk 



Ciliary 



Arteria centralis 

 Posterior ethmoidal 



Optic nerve 

 Internal carotid 



FIG. 1(51. 

 Opthalmic artery and branches. (After M fried and Kalliuft.) (Ball.) 



The ARTERIES of the GLOBE of the eye are : 



1. The short ciliary, enter through the sclerotic around the 

 optic nerve, to supply the choroid and ciliary processes. 



2. The long ciliary arteries, two in number, pierce the 

 sclerotic, run forward between the choroid and sclerotic to the 

 ciliary muscle, which they supply, and where they form an anas- 

 tomotic circle about the iris. 



3. The anterior ciliary arteries, five or six in number, enter 

 the sclerotic in front, supply the ciliary processes, and anasto- 

 mose about the iris. 



4. The arteria centralis retina, supplies the retina, dividing 

 into four or five branches, which enter as deeply as the inner 

 nuclear layer. 



