Neuroscience and psych sound OK to me. I did only wet-lab research before medical school, and not-surprisingly, immunohistochemistry never came up on the wards.
I'd be less excited about geology research, or something like that, but you'll be surprised later on what tangential skill sets are applicable to medicine. Pure math? Computer programming? Botany? Entomology? Statistics? I work in a genetics lab that interacts with MDs and PhDs with these skill-sets all the time. We couldn't do what we do without them.
Now, medical school admission committees might not be so expansive in their opinions, but I doubt any of them would fail to see the connection between psychology or neuroscience research and a medical career. It will be more important for you to make connections between your research and your future career. "My psychology research made me appreciate how humans experience reality through the veil of the mind, and made me very interested to pursue this further through a career in psychiatry or neurology"...or some tripe like that 🙂