Biological approach to explaining OCD (Not entirely genetic (Monozygotic…
Biological approach to explaining OCD
Uses 2 kinds of genetic explanations
A meta-analysis was done into twins to find out whether or not both twins could have OCD
Data looked at 10,000 twins
If one twin gets the OCD gene then it is certain that the other will get the gene to.
Found that there's a 45%-65% chance of genetic influences being a cause of OCD
Monozygotic twins = 100% the same genes = result of the egg splitting.
Nestadt found that first degree relatives of OCD sufferers had a much greater chance of getting OCD then those who didn’t have OCD parents.
Family studies show that children with OCD have often got parents with OCD.
Serotonin has been linked with preventing the repetition of tasks
Links with OCD have been established with neurotransmitters.
people who have low levels of serotonin have been more likely to have OCD
There are two possible explanations for OCD using neural explanations
brain circuits and neurotransmitters.
explanations based on the brain.
Found that the participants showed OCD characteristics even more predominantly
Zohar gave 12 OCD patient participants drugs that reduce serotonin levels
indications that this area is involved in OCD come from the after effects of head trauma or brain surgery.
One explanation = an abnormality in the basal ganglia.
urgery has been done where the basal ganglia has been detached from the frontal cortex and reductions in OCD have been observed
Not entirely genetic
Monozygotic twins are 100% identical therefore if one twin had OCD then the other should
Genetics cannot be the origin of OCD.
This is not always the case
Evidence suggest that genetics can be a component of OCD,