The cerebellum is located at the back of the brain and is divided into 3 lobes. It coordinates movement and maintains balance and posture. The cerebellum receives input from sensory systems and the motor cortex and sends output through cerebellar nuclei to affect movement. At its core are Purkinje cells that help the cerebellum detect errors and coordinate precise movements through inhibition and excitation of deep nuclear cells and motor areas. Damage results in ataxia and loss of coordinated movement.