Infarction of the hippocampus and the right ventroposterolateral thala
mus was observed. Angiography revealed a posterior cerebral artery occ
luded near its origin, immediately upstream from the posterior communi
cating artery. The infarction was limited to the areas irrigated by th
e branches originating in the proximal part of the artery. More distal
branches.for the calcarine scissure and the temporooccipital gyruses
were not involved.