A psychological disorder characterized by delusions, hallucinations, disorganized speech, disorganized motor movements, and/or diminished, inappropriate emotional expression.
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* **Causes**
* **Genetic basis**
* Studies from research on twins, relatives, and adoptees showed that __schizophrenia had a genetic factor__, and children having a high risk for schizophrenia genetically and being raised in a disturbed household had increased risk of having it
* **Neurotransmitters**
* **Dopamine hypothesis:** during studies that showed an increase in dopamine caused schizophrenia-like symptoms and medications that blocked dopamine reduced the symptoms, this theory suggests that too much dopamine/dopamine receptors play a part
* **Brain Anatomy**
* Large ventricles, which means less brain mass in other areas, suggesting that schizophrenia may be caused by lack of brain tissue
* **Events during Pregancy**
* Catching influenza, mother’s stress, and obstetric complications may all increase the risk of developing schizophrenia
* **Marijuana**
* Those with schizophrenia are more likely to use marijuana, and it is a risk factor
* *Warning signs include unusual thought content, paranoia, delusions, odd communication, problems in school/work and a decrease in social functioning*