[The elementary visual and psychovisual manifestations in cerebral circulatory insufficiency]

A correlation between cerebral vascular topography and visual ways topography was made. The carotid vascularization intricates with the vertebral basilar vascularization, because the pre-geniculate and post-geniculate optical ways have mainly a carotid irrigation, while the diencephalic intermedial nervous centers and the final cortical nervous centers have mainly a vertebral basilar vascularization. It is shown that there are some individual arterial anatomical variations, two of which having a remarkable importance. The former refers to the carotid origin of the posterior cerebral arteria, which makes that the totality of visual ways being irrigated by carotid circulatory system. The latter refers to the Willis atypical polygons, which determine important atipies in the topographical distribution of the chiasma's arteries and optical bandelets. By visual field's modifications are sampled the different types of cerebral circulatory insufficiency.