There is a whole series (probably a semester) of Professor Robert Sapolsky's lectures available on YouTube via Stanford University. How cool is that?
I'm starting with this one just because it randomly appeared in a Google search for something - serendipity or something.
(May 26, 2010) Professor Robert Sapolsky finishes his lecture on language and then dives into his discussion about schizophrenia. He discusses environmental factors as well as genetic characteristics that could apply to people who are affected. He describes schizophrenia as a disease of thought disorder and inappropriate emotional attributes.