Most neuro careers ultimately require a MD or Ph.D. The groundwork for these begin in high school first of all making sure you can get into college and have pre-requisites to take the courses you need when you get there.
Key High School Courses
Biology
Chemistry
Physics
Math- with pre-calculus
English - composition and vocabulary
Key College Courses
Biology major (chemistry, physics, computer science minors)
Physiology
Genetics
Statistics
Bioengineering
Psychology
Cognitive Science
Graduate School
Medical doctor MD
Ph.D.