Biological explanations for Schizophrenia Flashcards
What is the biological explanation for schizophrenia?
Biological explanations view schizophrenia as an inheritable disorder associated with abnormal neurotransmitter function (dopamine) and brain structure.
What is the likelihood of a person with unaffected relatives developing schizophrenia?
0.2-2%
What is the likelihood of person with one affected parent developing schizophrenia?
25%
What is the likelihood of a person with two affected parents developing schizophrenia?
50%
Who conducted a study to see the concordance rates of schizophrenia on twins?
Gottesman ‘66 using a sample 57 twins reported a concordance rate of 42% for monozygotic twins and 9% for dizygotic twins.
What is a concordance rate?
The average probability of an individual developing the disorder if they have an affected relative. In the case of schizophrenia
What is the problem with family history and twin studies supporting the biological approach?
They fail to separate the influence of nature and nurture and twins and family members tend to share similar parenting styles, learning experiences and social environments.
What conducted a study on adopted children of schizophrenic mothers?
Heston found a concordance rate of 10% between adopted away children and their schizophrenic mothers, and children of schizophrenic mothers, and child of schizophrenic mothers were more likely to be sociopathic, neurotic and criminal.
What is a strength of adoption studies in the context of schizophrenia?
They involve studying the concordance rates of adopted offspring away from their schizophrenic mothers thus untangling the influence of biology and environment.
What are excessive levels of neurotransmitters dopamine associated with?
Schizophrenia
What drug is used to treat schizophrenia?
Phenothiazines
How do Phenothiazines treat schizophrenia?
Inhibit dopamine activity and reduce symptoms such as delusions and hallucinations.
What is side effect of phenothiazines?
Stiffness of limbs
What are the symptoms of Parkinson’s disease?
Stiffness of limbs
What drug is used to treat Parkinson’s disease?
L-Dopa