this semester i took Ochem 1 + lab, Genetics, and Physics 1 + lab. It was tough, I had to study a lot every week to keep up with all of the reading, notes, et al. The labs were also a bit treacherous - just ate a lot of time in class and preparing reports, if you are trying to volunteer as well and/or work all of which I struggled through - it is doable if you stay on task 85% of your free time. I didn't take a neuro class like you are planning to and I can't imagine adding more class work to what I was doing. But, I was working about 20 hours a week so if you aren't I would say that it would be feasible. Additionally if you are shooting for the stars merely to do it, I would advise against it. As has been said many times before on this forum, this is a marathon not a sprint, and it would be much better to do really well in two or three classes then mediocre in four tough ones, not that I don't doubt you have the ability, just that any person no matter how skilled or bright will have to work very hard in some or all of those classes to get an A. - hope it helps - good luck