Jelicić N, Draganić V, Jovanović S
Acta Anat (Basel). 1985;121(3):179-83.
The posterior inferior cerebellar artery has a curved course in the region of the medulla oblongata. Besides its frequent individual variations, this vessel exhibits three morphological types: in type 1 (the commonest type, i.e. more than 50% of the cases) it curves with its vertex turned upwards; in type 2, the posterior inferior cerebellar artery turns in a gentle arch on to the posterior surface of the medulla oblongata, so there is no real curve; in type 3, the posterior inferior cerebellar artery curves but its vertex turns downwards. In all of these cases, the artery is in close relationship with the last four cranial nerves. This relationship is most characteristic in the 1st and 3rd types. The morphological types could be recognised on the angiograms.
小脑下后动脉在延髓区域走行呈弯曲状。除了常见的个体变异外，该血管呈现三种形态类型：1型（最常见类型，即超过50%的病例）其弯曲顶点向上；2型，小脑下后动脉呈平缓弓形转向延髓后表面，因此无真正的弯曲；3型，小脑下后动脉弯曲但其顶点向下。在所有这些情况下，该动脉与最后四对脑神经关系密切。这种关系在1型和3型中最为典型。这些形态类型可在血管造影片上识别。
