I find a lot of symptoms could be because of lack of dopamine if you read an experiement done on a med student they depleted his dopamine with something and observed the response, and I too have fathomed speech deficits to arise from the drugs and cognitive problems, memory problems making to stay on topic more difficult or forget the topic mid speech, usually only when talking to a quack.
http://www.reuniting.info/science/artic ... l_distress
or a maybe more interesting article about dopamine and personality function and working memory and happiness
"dopamine is strongly related to how well the prefrontal cortex holds information. "To hold in short-term memory a spatial map of the environment, for example, you must have the dopamine system activated; without it, you can't do this type of cognitive functioning"
http://www.news.cornell.edu/chronicle/9 ... amine.html
I go on a tangent coz I wrote this in schitophrenia from a guy called "illuminate".....i have an interesting delusion that illuminate are the ones that talk through the TV and made the media and $#%^ so impressive that you'd want to find personal significance to its artistic display.
and when I look back 15years I think of my first episodes when I though I would be saved by some infinitely intelligent group and nurture me before I ever turned expectation to psychiatry let down on life......now when I think of that light out there that would cultivate my attributes and ability that exists on other planes of existence if you look up planes in esoteric cosmology. Maybe that was the Illuminate I was thinking of, certainly better then getting labeled schizophrenic, even hear that some cia agents are recruited for being psychotic to a psychiatrist...the jobs arre out there people, shame there are no longer modern shamans.....another delusion is that the government is keeping us down for a reason, maybe they know about the good prognosis and transcendence of the personal functioning to encompass greater embrace of the potentials of mankind and may fight for kingship or most likely settle in peace.