Hi Elaine,
Firstly, nice to meet you! Brain fog is one phrase us old timers of TN use to describe the mish mash that happens with words, word recall and as Jon says - sometimes object misidentification. Thankfully for me, it doesn't happen when I'm typing, but verbally - words are always an annoyance for me. BTW, I'm 37.
My TN began almost 20 years ago, It was diagnosed 8 years ago, went bilateral 4 years ago and I too have never encountered anyone with any type of paralysis or palsy as a direct result of TN among the wonderful communities I belong to, so if this was something to happened "commonly" I've never met anyone it has happened to. I would take that as a positive sign and not a single one of my doctors has ever asked me about signs of paralysis.
During my worst attacks, I "feel" paralysed - my jaw hangs slack, I drool, so I am unable to speak, move my head or even feel like I can walk. I'll often just sit unmoving till that attack passes over. But I know this paralysis is not a physical thing, it's a direct mental reaction to the level of pain through that attack. The doctors pain scale only goes from 0 to 10 and that's SO ineffective for us, as I personally and others will agree here - have experienced inhuman amounts of pain in certain attacks. During those kind of attacks I find my brain tells me - if you move it'll hurt more. It is not a conscious decision, and I never think much on it till afterwards - but yes, I do find during those attacks that if I move my lips, scratch my nose, any movement of muscles on the face at all - will send further shooting pains along the trigeminal nerve.
Another word issue I have is word replacement for lack of a better term - speaking one word yet meaning another entirely. In similarity to Jon's object misidentification is a naming problem. Use the wrong name for things, oh thats a hard one to explain, umm ... People around me usually have a good giggle when I do these things.
I too had always been quite sure it is the medication that causes these things, along with some memory loss - some of which is short-term, some mid-term memorys. But anti-seizure medicines do actually make a person feel "dumber" and often thats a direct result of the action these meds play on in our brain - that of slowing down the firing of the nerve impulses. That usually has a direct action on other parts of our daily lives as well, so affecting speech, balance, hearing at times, and worst of all is the lack of energy. I am SO tired all the time. I switch between being an insomniac to sleeping up to 16 hours per day. I have to stop and take my meds now, so if I have forgotten something here (lol) then I will write back later.
Best wishes to all for a pain free Christmas!
Kerry xx