I spent a significant part of my MS1 year doing clinical research in neurosurgery with OR experience too. It was a fantastic time and really worth every minute.
Just remember a few things:
1) Your attending has been probably working 80-100 hours a week, every week, since they began their job. If they seem tired or cranky, it is not anything you did. But I'm not saying that on average, neurosurgeons are any meaner than other fields. I've never met a really malignant neurosurgeon, I think meanness is worn out of you in seven years of residency.
2) Everything the scrub nurse tells you is true. Regardless of what you may think. DO NOT challenge them. DO NOT ask them for instruments unless instructed. DO NOT make fun of them. They will make your life hell.
2b) The same applies for residents, fellows, anesthesiologists, and anyone else with an MD after their name.
3) Don't drop the bone flap.
4) Buy some reaaaaallly comfortable shoes, because in the land of brains, a four hour operation is mercifully short and 10+ is pretty common. Our record is 23. Yeah.
5) If you're interested in neurosurgery as a career, hanging out and doing operations and doing research is grand and all, but you CANNOT let your grades drop. Welcome to one of the most competitive fields in medicine. 👍
Oh, and practice suturing, because that may become your #1 job. No offense, but most attendings don't want you wielding the CUSA inside someone's head when you haven't yet finished gross anatomy.