From my experience, some of the best neurologists have a very strong foundation in basic internal medicine. I know a handful of people who are double-boarded in internal medicine and neurology, and I can tell you that they are awesome neurologists. But their specialties also are more relevant for internal medicine, e.g neurocritical care / stroke, neuro-oncology which is very medicine based vs movement disorders or dementia that may be slightly less medicine based. The bottom line is that a strong prelim year in medicine will in no way hurt you, and may help significantly if you choose a subspecialty that is more closely linked towards medicine. Also, remember that 2-3 decades ago, neurology was a subspecialty of internal medicine. Logically so, just as many subspecialties of internal medicine require a good analysis of various aspects of the whole body, so does neurology. Perhaps in some of the subfields, it may not make a huge difference. But if you want a broad generalization, I would definitely say that the neurologist with a strong foundation in internal medicine is a better overall neurologist than one who does not have a strong foundation in internal medicine.
I definitely would not listen to that "troll" with the SDN title "Onco". He is a waste of time and energy to the whole SDN community and in fact the whole world. It appers that essentially everyone on SDN would agree with me. He reminds of the type of person who is an outcast for valid reasons, the type of person who has no life, no friends, and is essentially a nuisance to society. As he even stated himself, if he were good enough to do neurosurgery, he would do so but he states that he is not, so he stated that he is going to do IM or IM/EM. Many of us here on this forum were clearely qualifed enough to pursue Neurosurgery but chose a more mellow field like Neurology. His immaturity is uncalled for and unacceptable. He really needs to get a life and grow up. I have completely refused to waste any of my time responding to any of his posts whatsoever. He is on my "ignore" list. So please do not listen to him. I would much rather that you listen to Gopher's comments, my comments, or others who present valid points and substantiate it with valid reasons.