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Evidence suggests that it is the interaction between genes and the environment may be associated with the development of schizophrenia. [2] This is a complex process involving multiple environmental factors that have influence on a range of developmental periods that interact with a genetic susceptibility. [7]
The question of how schizophrenia could be primarily genetically influenced, given that people with schizophrenia have lower fertility rates, is a paradox. It is expected that genetic variants that increase the risk of schizophrenia would be selected against, due to their negative effects on reproductive fitness .
Genetic Linkage studies attempt to find a correlation between the diagnosis and inheritance of certain alleles within families who have two or more ill relatives. An analysis of a linkage study uses a wide chromosomal region, whereas a genetic association study endeavors to identify a specific DNA polymorphism , which can be a deletion ...
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.
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.
Although many genetic variants associated with schizophrenia have been identified, their effects are usually very small, so they are combined onto a polygenic risk score. [55] These scores, despite accounting for hundreds of variants, only explain up to 6% in symptom variation and 7% of the risk for developing the disease. [35]
Frontal cortex activity will be impaired, when combined with excess DA activity: the basis for the advancement of schizophrenia, but it is also the neurologic mechanism behind many other psychotic diseases as well. However, the genetic component is the primary source of the neurological abnormalities which leave one prone to psychological ...
Proponents of the imprinted brain hypothesis argue that since it is uncertain if a woman's other and future children have and will have the same father, as well as the father generally having lower parental investment, it may be in the father's reproductive interest for his child to use more of the mother's resources than other children, while it may be in the mother's interest for a child to ...