Describe and evaluate the biological approach to OCD 12 mark essay plan

HideShow resource information
Preview of Describe and evaluate the biological approach to OCD 12 mark essay plan

First 325 words of the document:

Describe and evaluate the biological approach to OCD (12 marks)
A01
Point 1 Genetic explanations
Candidate genes
o Researchers have identified genes which create vulnerability for OCD
o Some of these genes are involved in regulating the development of the
serotonin system
o E.g. some genes could be implicated in the efficiency of transport of
serotonin across the synapses
OCD is polygenic
o OCD isn't caused by one single gene but there are many involved
o Taylor (2013) analysed findings of previous studies and found evidence that
up to 230 genes may be involved in OCD
o Genes that have been studied in relation to OCD include those associated
with the action of dopamine as well as serotonin, both neurotransmitters
believed to have a role in regulating mood
Different types of OCD
o One set of genes may cause OCD in one person but a different group of genes
may cause the disorder in another
o The origin of OCD has different causes
o Evidence to suggest that different types of OCD may be the result of
particular genetic variations, such as hoarding disorder and religious
obsession
Point 2 Neural explanations
Role of serotonin
o Neurotransmitters are responsible for relaying information from one neuron
to another
o If a person has low levels of serotonin then normal transmission of mood
relevant information doesn't take place and mood/other mental processes
are affected
Decision making systems
o Some cases are associated with impaired decision making
o This in turn may be associated with abnormal functioning of the lateral side
of the frontal lobes of the brain
Lateral frontal lobes
o Responsible for decision making and logical thinking
o Parahippocampal gyrus associated with processing unpleasant emotions
functions abnormally in OCD

Other pages in this set

Page 2

Preview of page 2

Here's a taster:

A02 Evaluation
Point 1 There is good supporting evidence
Nostadt et al (2010)
o 68% of identical twins shared OCD
o 31% of non identical twins shared OCD
Suggests genetic influence on OCD
Point 2 Too many candidate genes
Several genes are involved in OCD and each genetic variation only increases risk of
OCD by a fraction
The consequence is that a genetic explanation is unlikely to ever be very useful
because it provides little predictive value
Point 3 Some supporting evidence
Anti depressants help…read more

Comments

No comments have yet been made

Similar Psychology resources:

See all Psychology resources »See all resources »