I don't know which anatomy book you have used (Netter's seems to be a favorite), but Grant's Anatomy, in my opinion, better covers this type of thing. It has more tables in each section discussing vasculature and nerves. Of course Haines is go to for neuroanatomy specifically. But if you are talking about step 1 specifically. In depth Endeavors into these subjects can be a black hole. You would have to put A LOT of time into this to really know it all and still the exam may get you on a random innervation or vasculature supply you did not cover in your studies. I think the Q Banks (world) cover this well in terms of specific anatomy the examiners test more heavily than others.