I’m the opposite, I only discovered that TN and migraines are connected recently - I think on here. Ironic, considering I had a migraine specialist treat me who, much to my annoyance, marked me as having ‘chronic headache’ (I don’t) and a migraine sufferer. It’s caused me no end of bother since with medical proffessionals. However, she didn’t see fit to tell me migraine and TN are disorders of the same nerve!
The points you raise are interesting. Isn’t it possible though that anti-convulsant meds work on migraine (assuming they do; never met anyone who uses them!) because they dull the nerve response in the trigeminal nerve, or nerves in general? Just as they work for TN and epileptic seizures? Also migraine triggers are a bit different from epileptic triggers. Migraine is bright strong light rather than flashing, for example. I’m not conversant enough with epileptic triggers but I don’t think they are triggered by the same things, like dehydration, prolonged noise etc, the way migraines are. I think this could be an example of correlation not causation - they have similarities because they involve the trigeminal nerve but they don’t come from the same causes.
I can only talk about migraines from my point of view and mine are definitely about pain! Generally though they come from other things, yes, like lack of sleep or dehydration, but I find they have to be combined. I have to have lack of sleep combined with prolonged noise or prolonged travel on an overheated bus. Or combined hunger with strong sunlight and excessive exercise (that one will often have thirst thrown in). So I suppose really mine are a combination of physical stressors, which induce headache, which, if it’s not dealt with promptly will become a migraine - particularly if I can’t stop the physical stressors, like being able to get a drink, or having to stay on a bus, for example.
I get the neurological issues you mention (mine would be brain fuzziness - hard not to get that with a splitting headache! - and nausea and fatigue) but after the migraine, or at least as part of it, never before it - that I’m aware of! Maybe I do but the pain is just so overwhelming (although for me the nausea is usually the worst thing) that I don’t notice!
I think although they are both disorders of the trigeminal nerve, they may not be related in any other way, per se. Again, as you say, this could be correlation not causation. You could be right that there is a movement to connect headache with TN, although I suppose as they are both in the head this is bound to happen! But TN is definitely not a headache or a migraine in any shape, manner or form - not unless headaches can last for years!
But you seem to be suggesting you think TN could be connected to seizures? If so, that’s a really interesting idea. Have you found any evidence that supports this, or something about your own experience of ATN that suggests it?
E.T.A I should just add that ALL anti-convulsants cause an increased susceptibility to migraine in me. When I recently started Oxcarbazepine, on a very low dose, I had bad headaches every day for about the first 10 days, and the stiff neck I always get along with them. I know that when I up the dose it will do the same thing, every time. It’s deeply annoying!