I went through some patients file last week in the psychiatric department and found a case of Schizophrenia. The patients came with the symptoms of Delusion and disorganized speech which was hard to differentiate with the anxiety depression. He was playing with the words and no one understood, he created a word mismatch there right in place . He even had a disorganized speech and these symptoms carried for around 6-7 months
After this I came to know that these patients have a split mind because he cannot differentiate the reality and the fake . After some study I came to know that it was gameplay in the Neurotransmitter in the brain by serotonin, GABA and Nor-epinephrine. But somehow , the psychiatrist managed with the anti-psychotic drugs and the symptoms preety much releaved .
Hope you post soon about the schizophrenia cause I am too much eagerly waiting for this knowledge