The cerebellum, located at the back of the brain just above the brainstem, is the part of the brain primarily responsible for regulating balance, coordination, and fine motor control. It constantly receives signals from the inner ear, eyes, muscles, and joints to help maintain posture and ensure smooth, coordinated movements. While the cerebellum doesn't initiate movement — that’s the cerebrum’s job — it refines and adjusts actions in real time, allowing you to walk, stand, and move with precision. Damage to the cerebellum can result in unsteady movement, tremors, or difficulty with tasks requiring balance. Though relatively small compared to the cerebrum, the cerebellum contains more than half of the neurons in the entire brain, showcasing its complexity and importance. Whether you're riding a bike or simply standing upright, it’s the cerebellum that keeps you from falling over.