The rostral, middle and caudal cerebellar arteries were studied on the surface of the brain in 30 Didelphis albiventris, with the arterial system filled with colored latex. The arteries were systematized and the territorial area irrigation was determined. The rostral cerebellar artery was originated as a natural continuation of the terminal branch of the basilar artery in 93.3% of the cases, bilaterally, running to the rostral and dorsal surfaces of the lateral cerebellar hemispheres and forming a loop right above it. The middle cerebellar artery on the right side was seen double in 70% and single in 30% of the preparations and on the left side double in 56.7% and single in 43.3% of the findings. The caudal cerebellar artery was present single on the right side in 93.3% and double in 6.7% of the pieces and on the left side single in 86.7% and double in 13.3% of the cases.
cerebellar irrigation; cerebellar arteries; opossum; marsupials
