While I don't doubt at all that you will eventually specialize in neurology or neurosurgery, I would say that choosing a medical specialty is a very different decision than choosing a major - it's your career, potentially for the rest of your life. A major might be correlated with what you end up doing, but for most people, it's not even that. Furthermore, as students we at least have an idea of what to expect from a given major; coursework is coursework after all. On the other hand, it's much more challenging to gain insight into various medical professions and specialties because of all the barriers out there and simply because of the complexity of medicine - I certainly have little grasp of what being a doctor in X specialty is really like. With all this in mind, an extremely important thing is to stay open-minded with regards to specialties because things are going to change - whether it's you, or whether it's the specialty itself, or whether it's your perception of the specialty. Some people like you know what they want to do - and that's great! But my two cents is that there are at least 10 factors that should go above intended medical specialty when choosing a medical school - it really shouldn't be a significant factor.