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  Indian J Med Microbiol
 

Figure 3: (a) Anterior view depicting three posteroinferior cerebellar artery origin variants. The classic origin from the vertebral artery is depicted on the right, and origins from the anteroinferior cerebellar artery–posteroinferior cerebellar artery complex from the basilar artery and extradural origin of posteroinferior cerebellar artery at C1 are depicted on the left. (b) Pial anastomosis on the olivary surface between branches of posteroinferior cerebellar artery and superior cerebellar artery. (c) Posteroinferior cerebellar arteries originating at C1 bilaterally, both of which give rise to the lateral spinal arteries. Modified with permission from Figures 1-9 of Mercier et al., 2008[2]

Figure 3: (a) Anterior view depicting three posteroinferior cerebellar artery origin variants. The classic origin from the vertebral artery is depicted on the right, and origins from the anteroinferior cerebellar artery–posteroinferior cerebellar artery complex from the basilar artery and extradural origin of posteroinferior cerebellar artery at C1 are depicted on the left. (b) Pial anastomosis on the olivary surface between branches of posteroinferior cerebellar artery and superior cerebellar artery. (c) Posteroinferior cerebellar arteries originating at C1 bilaterally, both of which give rise to the lateral spinal arteries. Modified with permission from Figures 1-9 of Mercier <i>et al</i>., 2008<sup>[2]</sup>