honestly, I don't see you having much time during your second year (at UB) to be able to do research alongside of class. It will be close to impossible to put in a serious effort in the lab alongside studying for the exams that take place (on average) every two-three weeks.
You need to decide what's more important. Neurology is not as competitive as you would think, so I doubt research would be ultra-important, unless you want to go to a top program. For cardiology, you have to go through an IM residency first, and again, research is not important unless you want to go to a top program. Research DURING your IM residency is definitely important to get into a good cardiology fellowship.
I'm 100% sure that as a 3rd or 4th year, you can set aside elective time for research (at UB) if you're really serious about it (UB is full of labs who love to teach students at any level; you just need to find them). In general, if there are formalized electives to do research (or if it's a common trend to do such a type of elective), I've heard that you can get in on ongoing projects in some clinical/basic labs and get your name on a paper or at least have something to put down on your CV.
Just make sure you won't regret missing your family event in the summer as it will be your last long break from school!
Addendum:
Have you done any useful research during your undergrad/before med school? If so, then don't worry so much about doing research during school. If you already have a good amount of experience under your belt or even have a paper or two, then you're probably good to go. (Many residency directors understand that there isn't much time to devote to research during medical school; therefore any undergrad work is also looked at)