A02 biological explanations of schizophrenia Flashcards Preview

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Flashcards in A02 biological explanations of schizophrenia Deck (16)
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1
Q

What are the 2 sections?

A

Genetic factors

The dopamine hypothesis

2
Q

3 sections I’m genetic factors?

A

Family studies
Twin studies
Adoption studies

3
Q

Evaluation of family studies?

A

Some studies suggest that link between schizo and family relation could be more to do with rearing rather than genetic relations
For instance research on expressed emotion shows that negative emotional climates in some families may lead to stress beyond an individual’s coping mechanism which further lead to schizo Dev

4
Q

Who evaluated twin studies

A

Joseph

5
Q

What did joseph do and find

A

MZ twins are treated more similar and have a more similar environment than DZ twins

6
Q

Conclusion of twin studies

A

Concordance rates between MZ and DZ twins could be due to the environmental differences that distinguish the two types of twins

7
Q

Who evaluated adoption studies

A

Joseph

8
Q

What did joseph says for adoption studies

A

Unlikely for adoptive parents who adopted kids with a schizo parent to be different from adoptive parents who have a kids without schizo parent

9
Q

Conclusion of adoption studies

A

Results may have been influenced by the fact that adoptive parents who adopt a child without a schizo biological parent are different to adoptive parents who adopt kids with schizo biological parent
So it’s not a very good explanation or support for the genetic factors explanation

10
Q

What are the 2 sections of the dopamine hypothesis

A

Postmortem studies

Evidence from neuroimaging research

11
Q

Who evaluated postmortem studies

A

Haracz

12
Q

What did haracz do and find

A

Review post mortem studies of schizos
Found that most of those studied who shows increase in dopamine levels took anti psychotic drugs shortly before death
Indvs with normal levels of dopamine didn’t have medication

13
Q

Conclusion of post mortem studies

A

Anti psychotic drugs may actually increase levels if dopamine and therefore increase not alleviate symptoms of schizo so it goes against the evidence for the dopamine

14
Q

Who evaluated evidence for neuroimaging research

A

Copolov and crook

15
Q

What did copolov and crook find and do

A

Found that neuroimaging studies (PET scans) failed to show evidence of altered dopamine activity in the brain of schizos

16
Q

Why are PET scans important in the dopamine hypothesis

A

Because they are thought to investigate dopamine activity more precisely than other methods