cerebellum /ser′əbel″əm/ pl. cerebellums, cerebella [L, small brain] , the part of the brain located in the posterior cranial fossa behind the brainstem. It consists of two lateral cerebellar hemispheres, or lobes, and a middle section called the vermis. Three pairs of peduncles link it with the brainstem. Its functions are concerned primarily with coordinating voluntary muscular activity and are vital for balance and neuromuscular coordination.
