And although the cerebellum cannot actually initiate the movement of our muscles, it does coordinate the movement and precision timing of our muscles, our voluntary motions. Now, alcohol affects this part of the brain. So when we drink alcohol, that affects the regulation and control of our cerebellum. And that's exactly why if we drink too much, we end up stumbling and our coordination is not as good as it is when we're sober because alcohol affects the functionality of our cerebellum. Now, what about our myelin cephalon? So the myelin cephalon contains our medulla, also known as the medulla umbilingada.