Interviewer: Did you notice any differences between the back surgery and the brain surgery? Was it a different experience? Ulli F.: Yes, it was a bit different. Although I was almost less positive about the back than the brain. Interviewer: So, brain surgery was better? Ulli F.: Brain surgery, I just let it wash over me. That was clear. And what should also be said is that "there is not just nothing wrong with the head". But I didn't see that as negative. [...] I almost fell asleep there too. But that probably still happens to people a lot. You heard the first part, and you were often awake during the first part of the operation. And the second day was actually a normal operation, where they packed the wiring of the transmitter and the energy source. Interviewer: Yes. And that was one day after the brain surgery? Ulli F.: Yes, one. Interviewer: Okay, great. Ulli F.: I don't know if there are hospitals that do the whole thing in one day, but others do it in two [days].