Abstract
During the dissection of a posterior fossa in a cadaveric head, we found a solitary superior vermian artery (VA) originating from the posterior cerebral artery (PCA). On the right side, the VA arose from the precommunicating segment of the PCA. The VA distributed by giving off some branches to the interpeduncular fossa, cerebral peduncle, midbrain, cerebellar cortex, inferior colliculus, lingula, vermis and superior medullary velum. The right superior cerebellar artery (SCA) had a normal origin from the basilar artery (BA) and supplied the righ tentorial surface of the cerebellum by means of bifurcating into two major trunks. The left SCA had duplicated origin from the BA.
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