Just an observation but at the time of my surgery this kind of minutia, although relevant and important to some, was not a primary focus for me. However, my neurosurgeon (Dr. Goodrich) is training another neurosurgeon to take over his practice when he retires (he's about my age) and she assisted him during my surgery. Dr. Judith Gorelick is pleasant, extremely competent (she conducts neurosurgery classes at Yale medical school) and well-trained. I believe she did most of the skull drilling and later installed the titanium mesh. She also helped remove the tumor, which was quite large. My primary neurosurgeon did most of the tumor removal but it did take over 9 hours and I assume he needed a break at times. He later told my wife that Dr. Gorelick was a 'huge' help to him during the surgery, which, from my perspective, went quite well.
I would assume that every doctor has a slightly different approach to this kind of surgery, regarding 'who does what'. I was pleased to have two very skilled neurosurgeons performing my surgery, backed up by a 'hand picked' team. According to Dr. Goodrich, he doesn't perform surgery at nearby Yale Medical Center because it's a teaching hospital and, in his words: "Acoustic neuroma removal surgery is no place for amateurs". I think he meant interns and residents. Considering the wide variety of surgical outcomes for AN removal surgery and the fact that every AN patient wants to ensure the very best 'odds' possible for a good (no complications) surgical outcome, I can endorse my neurosurgeon's operating room philosophy. Of course interns and residents have to learn somewhere, but if we're honest, no AN patient being wheeled into an operating room for surgery really wants to be a young doctor's 'test case'. The surgery is too delicate and the consequences of a mistake, even a small one, can be devastating for the patient. No matter how they share the actual work of removing the tumor, I want 'pros' doing the work. I was fortunate to have that and enjoyed a good outcome. I wish the same for all AN surgical patients, no matter how many doctors it takes or who does what in the operating theater.
Jim