EXPLANATIONS OF OCD

what did a study on 343 family and relatives show?
that 80 of the first degree relatives also had ocd
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what did meta analysis of 14 twin studies find
monozygotic twins were twice as likely to have ocd if their twin has it
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The high amounts of the COMT gene is linked to a decrease in OCD,why?
because it terminates the action of dopamine which can cause the obsession through overactivity
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Abnormal levels of neurotransmitters can cause an increase in the likelihood of having ocd, state the two main neurotransmitters invloved?
serotinin and dopamine
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does and increase or decrease in serotonin cause ocd?
decrease
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do antidepressants increase or decrease serotonin levels?
increase which reduces the anxiety which stimulates an obsession
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what concordance rates were found between twins with OCD?
87% concordance between MZ twins only 13% environmental
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name an alternative gene to the COMT gene and what it showed?
the SAPAP3 gene which showed and increase in grooming with mice
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give an example of physiological evidence to support OCD being biological?
PET scan showed that people with OCD have an increased metabolism of glucose in the OFC loop of the brain
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whats the alternative to a biological approach
evolutionary
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name 3 behaviours that result as evolutionary adaptations
grooming, concern for others, hoarding
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give a strategy which has developed as an evolutionary adapatation
harm avoidance strategy
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give the 3 main psychological explanations of ocd?
behavioural, cognitive, psychodynamic
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which researcher was the psychodynamic approach based upon?
Freud
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what did freuds theory suggest about ocd
that it is learnt from a young age when a fixation occurs
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what two factors explain the behaioural approach
conditioning to create obsessions, reinforcement of compulsions to reduce anxiety
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Card 2

Front

what did meta analysis of 14 twin studies find

Back

monozygotic twins were twice as likely to have ocd if their twin has it

Card 3

Front

The high amounts of the COMT gene is linked to a decrease in OCD,why?

Back

Preview of the front of card 3

Card 4

Front

Abnormal levels of neurotransmitters can cause an increase in the likelihood of having ocd, state the two main neurotransmitters invloved?

Back

Preview of the front of card 4

Card 5

Front

does and increase or decrease in serotonin cause ocd?

Back

Preview of the front of card 5
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