Why is it that that stuff always gives me the heebiejeebies? (How does one spell heebiejeebies, exactly?)

It's one of my favorite things to read about, but here I am, working at home, alone in my room, and I got partway through the "Capgras' Syndrome" thing and started getting creeped out, then I read the first line of the "Cotards' Syndrome," ("characterized by the patient believing that he is dead...") and I had to stop reading.

Well, I didn't HAVE to stop reading, but I really have that hair-on-the-back-of-my-neck-standing-up thing going on, and I need to be focusing on work. But I've always wondered why I have such a strong reaction to this sort of thing. Seems like at this point nothing scares me more than thoughts of brain problems; It's not like i'm afraid of having them myself, it's the thought that they exist as problems. Or something.

Good link though. I will continue later probably.