A popular theory is that schizophrenia is caused by an imbalance of neurotransmitters in the brain. Neurotransmitters (pronounced NOOR-oh-TRANZ-mit-urz) are chemicals that carry electrical messages between nerve cells. Too much of a neurotransmitter, or too little, may account for various mental disorders, including schizophrenia.
There is still no consensus (agreement) as to which, if any, of these theories is correct, or whether the disease is caused by a combination of factors.
