246 PRACTICAL ANATOMY. 



brandies' in the carotid canal are the tympanic, one or 

 two small vessels to the middle of the ear. In the cav- 

 ernous groove are given off the arterise receptaculi, the 

 anterior meningeal, and the ophthalmic, The ophthalmic 

 is a large branch passing through the anterior lacerated 

 foramen, and gives off orbital and ocular branches. The 

 orbital branches are : 



Lachrymal. To the lachrymal gland. 



Supra-orbital. Passes through the supra-orbital 

 foramen. 



Posterior Ethmoidal. To ethmoidal cells. 



Anterior Ethmoidal. To ethmoidal cells. 



Palpebral. To the eyelids. 



Nasal. Anastomoses with the angular of facial. 



Frontal. To frontal region and scalp. 



The ocular branches are : 



Muscular. To orbital muscles. 



Ciliary. Long, short, and anterior to eyeball. 



Arteria Centralis Retinae. Pierces optic nerve and 

 supplies retina. 



The cerebral branches of the internal carotid are : 



Anterior Cerebral. Passes forward and inward and 

 curves around the anterior portion of corpus callosum 

 lying in the longitudinal fissure ; it sends branches to the 

 meninges. 



Middle Cerebral. Lies in the fissure of Sylvius and 

 sends branches to the meninges. 



Posterior Communicating. Passes back to the pos- 

 terior cerebral. 



Anterior Choroid. Arises external to the posterior 

 communicating. Is distributed to the structures of the 

 descending cornu of lateral ventricle. The two anterior 

 cerebral arteries are connected by a short trunk called 

 the anterior communicating. 



