What dregree does one need to become a neurosurgeon?

You can major in any degree. You can have a Math degree or English degree, it really doesn't matter. The only thing that matters is if you participant in the pre-med program and take your MCAT. However, a lot of people often go for a Biology degree, because biology is about the human body and this will better your chance of getting accepted into a Medical School. You need to undergo a pre-med program to be accepted into Medical School, once done, then you can train/practice to become a neurosurgeon.