SEM study of the choroid plexus of the lateral ventricle in the cat.

Corrosion casts of the complete vascular network of the choroid plexus of the lateral ventricle in the cat brain were studied in SEM using the injection-replication method. The villi of this plexus are located only on its supero-anterior and infero-posterior parts, being most densely packed in the former region, close to the interventricular foramen. The capillaries of the villi display small nodular thickenings, which suggest the presence of small, sinusoidal dilatations. The main vessel supplying the plexus with blood is the anterior choroidal artery. The plexus is also characterized by a particularly rich venous network, which is drained by a prominent (main) choroid vein. The vascular organization of the choroid plexus of the lateral ventricle in cat is compared to that of the corresponding plexuses in other mammals.