*sigh* Now I wonder if you're just trolling. 
You have no idea if you even like research. People who've never done it have these abstract ideas about what "doing research" is like. And no, most undergrads don't
do research, they do bitch work like washing dishes, autoclaving, and making solutions, not running major experiments and presenting on them. Most PIs won't trust an undergrad to do a major research project. Maybe tag along with a grad student, but that's about it. I've done 4 years of research (3 in grad school for my masters in biology and 1 in undergrad). I like research okay when it is going well. It REALLY SUCKS when it is not going well and you're not getting good results, trust me. You're putting the cart before the horse again.
And you don't just "get into" grad school like you do with undergrad or professional school. You have to usually find a faculty mentor who is willing to take you on, usually based on mutual research interest. Like my faculty adviser from grad school is THE world's expert on bisphenol A, an endocrine disrupting chemical and he's at the University of Missouri. I couldn't get that kind of mentorship, even at Harvard. In grad school, it depends more on WHO you do yours with, not WHERE.
I'm not precisely sure about getting a PhD after med school, but in veterinary medicine if you were interested in neurology/neurosurgery, what you would do is do your undergrad (4 years), do your DVM (4 years), do an intership (1-2 years), and then do a combined residency/graduate program (which would take about 5-6 years). Then you would sit the boards along with doing a doctoral dissertation with x number of publications and you'd end up with the following sets of initials: DVM PhD DACVIM (Neurology), which stands for Diplomate of the American College of Veterinary Internal Medicine (as neurology is a subspecialty of internal medicine).
