Cliffs:
Thinking causes me to have mental problems. I can perform at a normal level of cognition for short periods of time but after aggravating my symptoms I have to become inactive / stop thinking or my symptoms just get worse and worse.
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I posted in the dementia forum about cognitive problems but I think I more clearly understand what's wrong.
The problem is mental endurance. If I don't do anything all day, just sit on a couch and watch TV, I'm basically fine. However if I do anything that requires me to think, my symptoms start to come back. Besides feeling mentally tired and having cognitive problems, I get headaches on the left side of my head and start having problems seeing out of my left eye. Both of those symptoms can also be caused by lying down (I dont understand the connection).
I think I've told my doctors this in the past but one neurologist gave up on me and the other seems to think there's nothing wrong with me at all, based on the one fact that I'm doing relatively fine in college.
edit -- If it matters I sleep ~11 hours a day. I have trouble getting to sleep and getting good sleep.