Cerebellum is located behind the pons and the medulla and it is separated from the occipital lobes by the tentorium cerebelli.
The vermis is a part of the cerebellum that is located in the midline between the two cerebellar hemispheres. The surface of the cerebellum is repeatedly folded in so called folia. The cerebellum consist of a cortex and an underlying white matter in which four paired nuclei (fastigial nuclei/ nucleus fastigii, globuse nuclei/ nucleus globosum, dentate nucleus/ nucleus dentatus) can be identified in close relation to the roof of the forth ventricle.
The principle functions of cerebellum are to regulate eye movements, to coordinate limb movements and to maintain posture and balance. Cerebellum is also involved in motor decision-making. There is a somatotopic organisation of the different body parts.
The posterior inferior cerebellary artery/a.cerebellaris inferior
posterior (PICA), the anterior inferior cerebellary artery/a.cerebellaris
inferior anterior (AICA) and the superior cerebellary artery/a.cerebellaris
superior (SCA) provides blood supply of cerebellum.