16. The Biological Approach To Explaining OCD AO1 Flashcards Preview

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Flashcards in 16. The Biological Approach To Explaining OCD AO1 Deck (21)
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1

What are the two biological explanations to explaining OCD?

- Genetic explanations
- Neural explanations

2

What are candidate genes?

Genes that researchers have identified as creating a vulnerability for OCD

3

Name two genes present in OCD

- serotonin
- dopamine

4

Give an example of a serotonin gene

5HT1-D

5

Explain serotonin genes

They are implicated in the transmission of serotonin across synapses

6

Explain dopamine genes

They're also implicated in OCD

7

What do both dopamine and serotonin have in common?

The both neurotransmitters that play a role in regulating mood

8

How many genes are involved in OCD?

Up to 230 different genes may be involved

9

Outline how different types of OCD occur in different people

One group of genes may cause OCD in one person but a different group of genes may cause the disorder in another person

10

What is aetiologically heterogeneous?

One group of genes may cause OCD in one person but a different group of genes may cause the disorder in another person

11

What is it called when one group of genes causes OCD in one person but not in another person?

aetiologically heterogeneous

12

What else is there evidence for in genetic explanations of OCD?

Different types of OCD may be the result of a particular genetic variation, such as hoarding

13

What is the role of neurotransmitters?

Neurotransmitters are responsible for relaying information from one neuron to another

14

What can OCD be associated with?

Impaired decision-making

15

What could impaired decision-making be associated with?

Abnormal functioning of the lateral and frontal lobes of the brain

16

What is the frontal lobe responsible for?

Logical thinking and making decisions

17

What is responsible for processing unpleasant emotions?

Parahippocampal gyrus

18

What is parahippocampal gyrus dysfunction?

Evidence suggests it is associated with processing unpleasant emotions

19

What was Nestadt's study?

Reviewed twin studies and found that 68% of identical twins shared OCD as opposed to 31% of non-identical twins which strongly supports a genetic influence on OCD

20

What is having two disorders together called?

Co-morbidity

21

How does the parahippocampal gyrus act in OCD

functions abnormally and OCD