612 THE VASCULAR SYSTEMS 



The branches given off from the internal carotid artery are: 



f Tympanic (internal or deep). 

 From the Petrous Portion < y-^ian 



( Arteriae Receptaculi. 



From the Cavernous Portion < Anterior Meningeal. 



(^ Ophthalmic. 

 f Anterior Cerebral. 



77 ^ n i j r> 4- \ Middle Cerebral. 

 From the Cerebral Portion 



Communicating. 

 t Anterior Choroid or Prechoroid. 



The cervical portion of the internal carotid gives off no branches. 



1. The tympanic (ramus caroticotympanicus) is a small branch from the petrous 

 portion, which enters the cavity of the tympanum through a minute foramen in 

 the carotid canal, and anastomoses with the tympanic branch of the internal 

 maxillary, and with the stylomastoid artery. 



Nasal. Palpebral. 



Supraorbital. 



Anterior ethmoidal. 



Posterior ethmoidal. 



3*emporal branches 

 of lacrimal. 



Muscular, 



Ophthalmic. 



Internal carotid. 



FIG. 448. The ophthalmic artery and its branches, the roof of the orbit having been removed. 



2. The Vidian is a small, inconstant branch which passes through the Vidian 

 canal and anastomoses with the Vidian branch of the internal maxillary artery. 



3. The arteriae receptaculi are numerous small vessels, derived from the inter- 

 nal carotid in the cavernous sinus; they supply the hypophysis (pituitary body), 

 the Gasserian ganglion, and the walls of the cavernous and inferior petrosal 

 sinuses. Some of these branches anastomose with branches of the middle 

 meningeal. 



4. The anterior meningeal (a. praedurcdis, a. meningea anterior] is a small 

 branch which passes over the lesser wing of the sphenoid to supply the dura of the 



