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Schizophrenia Causes

Causes of Schizophrenia A2

QuestionAnswer
Name the three main types of biological explanation for schizophrenia? Genetic, Dopamine Hypothesis and Neuroanatomical.
What three types of studies support the genetic explanation for schizophrenia? Family, Twin and Adoption Studies
What did Kendler et al find? That first degree relatives to sufferers of schizophrenia are 18 times more likely to develop it than the general population.
Who conducted the prospective longitudinal study, carried out in Denmark, to try and find genetic links? Kety et al
According to the dopamine hypothesis, what causes schizophrenia? Excess of dopamine in the brain or too many dopamine receptors.
Why is dopamine unlikely to be the only cause of schizophrenia? It is unlikely that a single neurotransmitter can cause a variety of different illnesses such as mania.
What type of symptoms do drugs tend to alleviate? Positive symptoms.
According to MRI scans, how are brains of schizophrenia sufferers different from normal people? Schizophrenics have decreased brain weight.
One of the main problems with neuroanatomical explanations is... We are unsure whether schizophrenia causes a decrease in brain weight or the other way around.
Why can't genetics be the only explanation of schizophrenia? Because the MZ twin concordance rate isn't 100%
Created by: beci
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