[ska]

> 10 years ago. In Poland.

Interesting; I've much more exposure to US. Overall, I'd say there are sites that do it pretty routinely, but far more sites that basically never do it. And others that don't even have the equipment/licenses if they wanted to. For what it's worth, overall neurosurgeons do much more spine surgery than brain. In the particular case you mention, I've seen a lot of mapping and/or testing for surgeries near eloquent function, but little fMRI. Outside of that, basically unheard of.