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A genetic predisposition on its own, without superimposed environmental risk factors, is not thought to give rise to schizophrenia. [ 4 ] [ 6 ] Environmental risk factors are many, and include pregnancy complications , prenatal stress and nutrition , and adverse childhood experiences .
The causes of schizophrenia may include genetic and environmental factors. [7] Genetic factors include a variety of common and rare genetic variants . [ 21 ] Possible environmental factors include being raised in a city , childhood adversity, cannabis use during adolescence, infections, the age of a person's mother or father , and poor ...
The causes of schizophrenia that underlie the development of schizophrenia, a psychiatric disorder, are complex and not clearly understood.A number of hypotheses including the dopamine hypothesis, and the glutamate hypothesis have been put forward in an attempt to explain the link between altered brain function and the symptoms and development of schizophrenia.
Schizophrenia is a debilitating and often misunderstood disorder that affects up to 1% of the world's population. [1] Although schizophrenia is a heavily studied disorder, it has remained largely impervious to scientific understanding; epigenetics offers a new avenue for research, understanding, and treatment.
Risk factors for mental illness include psychological trauma, adverse childhood experiences, genetic predisposition, and personality traits. [7] [8] Correlations between mental disorders and substance use are also found to have a two way relationship, in that substance use can lead to the development of mental disorders and having mental disorders can lead to substance use/abuse.
The basic principle behind psychiatric genetics is that genetic polymorphisms (as indicated by linkage to e.g. a single nucleotide polymorphism) are part of the causation of psychiatric disorders. [1] Psychiatric genetics is a somewhat new name for the old question, "Are behavioral and psychological conditions and deviations inherited?".
All four of the sisters developed schizophrenia by the age of 24. [2] There was a history of mental illness in Mr. Genain's family that might have been an example of genetics being linked with mental illness or it may have just been a dysfunctional and abusive family free from a specific genetic component.
Symptoms of schizophrenia such as delusions are extreme versions of cognitive processes that can be greatly beneficial. Such symptoms that are at the undesirable extreme of normality, however, result in more harm than benefit. Timothy Crow hypothesizes that schizophrenia is closely related to human language development. [7]
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