[Quoth]

No, ECT has been used, unfortunately. I'm no expert, but it seems to have been tried for nearly everything and ought like polygraphs (lie detectors) to be banned as pseudo-science. Lots of treatments for depression are really really stupid, including ECT.

Yes, EEG was and is used too. It takes longer and now can even be portable at home. You can now make your own DIY EEG and ECG, though care with electrical isolation is needed. Battery power and and isolated serial or USB link adaptor (off the shelf item) is a really good idea. A MRI is useful only in cases where there are physical issues in the brain, such as lesions. Only a proportion of epilepsy sufferers have that, but it's a useful diagnostic test to establish if that is the case as different treatment may be appropriate. I'm very familiar with chart recorders (of the galvanometer pen type and later simulated ones using a printer in graphics mode via analogue to digital conversion and storage) and have designed electronics to capture data instead which allows computer analysis and sending files to a different expert to view on screen.

Yes, some people have worse side effects from some medications than the actual episodes.

Basically what I was trying to say is that there isn't any stereotypical disease called Epilepsy, like say Measles. It's basically the label when you have more than one seizure. There are many known reasons, many treatments. A significant number of cases have no known reason. A significant number don't respond to medication. Some respond to a change in diet or lifestyle. The most stereotypical thought people have is that video games or flashing lights can trigger an episode. That's maybe 5%.

Unfortunately putting sane people (esp unwanted wives) into Asylums was prevalent in the west up till late 1960s simply if the person was eccentric, awkward, had a baby out of wedlock or you wanted her money. Some establishments in Ireland were called Laundries. In USSR political views could mean the Asylum till fall of USSR (I don't know about Russia and China today).

Medical people even in 1920s would not have regarded epilepsy as either demonic or madness, though some of the public might have. Some still might.
Certainly some in Victorian times were put in asylums because they had epilepsy, though at the end of that era the experts seem to have regarded it as unfortunate rather than madness.

We don't know what the OP has in mind.