This is an explanation of schizophrenia by Dr. Karl Deisseroth. It is an educated explanation, but by no means an exhaustive explanation.
Dr. Deisseroth earned his undergraduate degree from Harvard University, and his PhD and MD from Stanford University. He is a professor of bioengineering, psychiatry, and behavioral sciences at Stanford University. He has won multiple awards, including the Keio Medical Science Prize (2014) for his development of a new technology called optogenetics: