At 4 min and 30 sec - Perceptual disturbances and sensory experience impairments causing situation incongruent behavior such as laughing unexpectedly one minute, agitated the next minute and sobbing the 3rd minute. At 5 min and 45 sec of the video - Brain Abnormalities and physiological components such as increase in activity in the thalamus region or the an increase in dopamine receptors causing Unusual high activity in the thalamus and the fear processing centers in paranoid schizophrenics . 8 min 30 sec - Dissociative Identity Disorders in Schizophrenia.  

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This video is by Dr. William Mcfarlane - Chief of Psychiatry at the University of Vermont - A Leading Authority on Schizophrenia who has worked with Schizophrenics for the last 30 years.

At 29 min 30 sec - The attention arousal theory, talks about how a brain of a Schizophrenic declines in its ability to pay attention or to focus courtesy the stress on the brain from the arousal being heightened from the overload of sensory perceptions and its corresponding physiology affected by this sensory overload.

At 32 min - The Brain of a Schizophrenic -

Dopamine, serotonin, glutamine, noradrenalin - the 4 key neurotransmitters regulated by the brain stem in the mid brain. These transmitters are crucial to attention arousal as well as levels of consciousness as a whole. These transmitters directly affect our prefrontal cortex our seat of thinking. It is in this cortex that memory, learning and social interaction is made possible. The pre-frontal cortex also directly affects attention, organizational abilities, goal directed behavior, motivation and mental liveliness all which are my key strengths.

When researchers make scans of the prefrontal lobes a reduced functioning by about a 1/2 a normal persons capacity is apparent. Conversely the sensory area of the scan shows hyper stimulation which is what causes the blatant reduced functioning in the prefrontal cortex of the brain. Scans with high imaging depths are able to monitor the cellular structure in the hippocampal region which will show cellular degeneration in the brain of a Schizophrenic. Also in Schizophrenia the size of the thalamus tends to be smaller and its activity tends to be lower.