[Vascularization of the choroid tela of the 4th ventricle in sheep (Ovis aries)].

The tela choroïdea of the fourth ventricle of the sheep is vascularized principally by the caudal cerebellar artery and the dorsal network of the medulla. The choroidal branches arising from these arteries supply the capillary network of the choroïd plexus. The latter drains towards the sigmoid sinus either through the dorsal veins of the medulla or by an anastomose with the ventral veins. The latter are arched and seem to be metameric. Some choroid veins are tributary of the hemispheric cerebellar veins.