Schizophrenia is now one diagnosis. Although the subtypes are no longer used in clinical diagnosis, the names of the subtypes may be known for people diagnosed prior to the DSM-5 in These classic subtypes included:.
According to the DSM-5, to be diagnosed with schizophrenia, two or more of the following must be present during a 1-month period. Research has shown that heredity or genetics can be an important contributing factor for the development of schizophrenia. Although the exact cause of this complex disorder is unknown, people who have relatives with schizophrenia tend to have a higher risk for developing it.
One treatment option for schizophrenia is long-acting injections. Learn more. The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health.
From Genetics Home Reference. Description Schizophrenia is a brain disorder classified as a psychosis, which means that it affects a person's thinking, sense of self, and perceptions.
Frequency Schizophrenia is a common disorder that occurs all over the world. Causes Variations in many genes likely contribute to the risk of developing schizophrenia. Inheritance The inheritance pattern for schizophrenia is usually unknown. Other Names for This Condition Dementia praecox. Research Studies from ClinicalTrials. Childhood adversity and cortical thickness and surface area in a population at familial high risk of schizophrenia. Psychol Med. Epub Dec Schizophr Bull.
Epub Jun In identical twins, if a twin develops schizophrenia, the other twin has a 1 in 2 chance of developing it, too. This is true even if they're raised separately. In non-identical twins, who have different genetic make-ups, when a twin develops schizophrenia, the other only has a 1 in 8 chance of developing the condition. While this is higher than in the general population, where the chance is about 1 in , it suggests genes are not the only factor influencing the development of schizophrenia.
Studies of people with schizophrenia have shown there are subtle differences in the structure of their brains. These changes are not seen in everyone with schizophrenia and can occur in people who do not have a mental illness.
But they suggest schizophrenia may partly be a disorder of the brain. There's a connection between neurotransmitters and schizophrenia because drugs that alter the levels of neurotransmitters in the brain are known to relieve some of the symptoms of schizophrenia.
Research suggests schizophrenia may be caused by a change in the level of 2 neurotransmitters: dopamine and serotonin. Some studies indicate an imbalance between the 2 may be the basis of the problem.
Cleveland Clinic. Schizophrenia: overview and treatment options. Your Privacy Rights. To change or withdraw your consent choices for VerywellMind. At any time, you can update your settings through the "EU Privacy" link at the bottom of any page. These choices will be signaled globally to our partners and will not affect browsing data.
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Related Articles. The Warning Signs of Schizophrenia in Children. What Is Residual Schizophrenia? What Causes Autism? What Does Dementia Praecox Mean? Can Marijuana Cause Psychosis? Causes and Risk Factors of Schizophrenia.
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