BIOLOGICAL APPROACH TO EXPLAINING OCD Flashcards Preview

AQA A LEVEL PSYCHOLOGY PAPER 1 - PSYCHOPATHOLOGY > BIOLOGICAL APPROACH TO EXPLAINING OCD > Flashcards

Flashcards in BIOLOGICAL APPROACH TO EXPLAINING OCD Deck (26)
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1

how many explanations are there for OCD in the biological approach?

2

2

what are the two explanations for OCD?

genetic
neural

3

what are candidate genes in OCD?

a gene of interest when looking a particular behaviours/characteristics that could be inherited

4

what are family studies?

family studies are when you look at similarities within families for example if one relative has OCD what at the chances of others

5

what are chromosomes?

23 pairs of chromosomes, 46 in total

6

what are genes?

information about a part of you

7

what is DNA?

a chemical structure

8

what are concordance rates?

the rate of similarity e.g. in twin studies

9

what are two candidate genes that can lead to the inheritance of OCD?

COMT
SERT

10

what does the COMT gene regulate?

levels of dopamine

11

in OCD, are the levels of dopamine increased or decreased?

they are increased

12

who supports that the COMT gene can lead to higher levels of dopamine?

Tukel who says that a variation/mutation in the COMT gene can lower activity and increase levels of dopamine

13

what does the SERT gene regulate?

the levels of serotonin

14

are levels of seratonin increase or decreased on OCD?

decreased

15

who has research to support the SERT gene leading to the inheritance of OCD?

Ozaki found that a mutation of SERT gene in unrelated families with 6/7 members with OCD had lower levels of seratonin

16

OCD is...

polygenic

17

what does polygenic mean?

means many genes

18

who found that there may be over 230 genes involved in the inheritance of OCD?

Taylor

19

what are neural explanations for OCD?

serotonin
decision making system

20

how does the neural explanation describe serotonin?

low levels of serotonin lower mood

21

what are the neurotransmitters responsible for?

responsible for relaying information from one neuron to another

22

what occurs if there are lower levels of serotonin than normal?

no transmission of mood relevant information

23

what is impaired in the frontal lobes?

decision making systems

24

what are the frontal lobes responsible for?

logical thinking and decision making

25

what part of the brain is dysfunctional in OCD according to the neural explanation?

the paragippocampal gyrus

26

what is the parahippocampal gyrus responsible for?

processing unpleasant emotions