Golden:
I'm not a physician but it would seem logical that neuropsychological testing - and there are dozens of specific tests available - might be advantageous in helping to find solutions for your post-op problems. I would go for it.
The issue of surgeons being disinterested (and inexperienced) in handling their patient's problems resulting from the AN removal surgery is, unfortunately, quite common. They are specialists and few are interested or even qualified to treat the 'whole' person. I think of it this way; like expecting my plumber - a specialist in his own field - to fix my automobile's problems. Come to think of it, even auto mechanics specialize, now. There are brake specialists, engine electronics specialists, etc. The advent of the medical specialist may have narrowed doctor's skill sets but probably increased their overall successes, especially in the surgical disciplines. However, I wish more neurosurgeons could show greater interest in the after-effects of their surgery, educate themselves on the specialist(s) that could possibly help patients with post-op-related problems and recommend these doctors to patients who are suffering, sometimes for years, as you have. Until that happens, we have to be pro-active and seek out specialists that can possibly help. That being the case, you're on the right track - and I wish you success.
Jim