The NIV definitely says seizures whether you like it or not. Jesus was silly enough to play a game of exorcism hocus pocus if the gospel account is correct. Carrying out any such nonsense on a child is very WRONG indeed. It still happens to this day and has even caused death. It should be illegal to carry out exorcisms on children and the vulnerable.
Luke's medical background? A fully qualified doctor was he?
If Jesus truly was God incarnate, then we might have expected better of him (since it is highly unlikely that demons do exist). However, since it is far more likely that he was a somewhat deluded wandering preacher (with a number of life-enhancing things to say), then it is a bit much to expect anything more from him than acting according to the accepted beliefs of the time. I've a feeling that Hippocrates was rather loath to invoke spiritual forces in explaining signs of mental disturbance, and so probably were a number of his ancient Greek contemporaries, but they always tended to be a bit ahead of the game, didn't they?
We've no idea who Luke was, or whether he really wrote the gospel and Acts attributed to him. That a certain Luke mentioned in the Bible was a "beloved physician" probably indicates that there was a trusted doctor around among the disciples, and by the standards of the time, he was probably quite adept.
It is worth bearing in mind, however, (before getting too caught up in the idea of the inexorable progress of history) that modern medicine
doesn't always work; and ancient medicine
didn't always fail. I'd trust myself more with modern methods of dealing with appendicitis or bladder stones though