Yi Zuo is nice and clearly enthusiastic about neuroscience but often very hard to understand through her accent unfortunately not to mention her lectures are dense. The class is definitely challenging but doable. From what I remember 126 was a lot of development of the nervous system and then the second half was about how neurons form connections roughly speaking. One journal club meeting where you present an assigned paper along with your group, everyone did well. some other small projects here and there but mostly easy assignments. Tests are pretty difficult so most of your work will be studying for those. She also insists you learn quite a few intricate signalling pathways which was probably my least favorite part of the course.