It produces extrapyramidal symptoms with necrosis of the cerebral cortex, cerebellum, and basal ganglia. Cerebellar ataxia is a form of ataxia originating in the cerebellum. The damage to the cerebellum or the inferior cerebellar peduncle can cause ataxia. The brain consists of the cerebrum, the brainstem and the cerebellum. The brain consists of equal parts, cerebrum, midbrain and cerebellum. The cerebrum, brainstem, cerebellum, and spinal cord are covered by three membranes called meninges. The cerebellum and cerebral cortex are generally spared. A compressive tumor infringes upon the cerebellum or brainstem. These signals act on the cerebral cortex, the cerebellum, and the brainstem. Procedural memory involved in motor learning depends on the cerebellum and basal ganglia. Blood from the cerebellum and midbrain drains into the great cerebral vein. The fourth ventricle, pons and medulla are in front of the cerebellum. Without taurine, felines can have an abnormal morphology in the cerebellum and visual cortex. The alcohol abuse causes degeneration of the anterior vermis of the cerebellum. Behind the brainstem is the cerebellum ().