OCD - Biological Explanartions

Genetic Explanations of OCD

Family Studies =

• 1st degree relatives, 50% of genes shared
• Compare OCD rates in relatives of diagnosed case, copared to relatives without disorder.
• Closer genetic relationship, higher concordance rate.
• Pauls et al -> 10% 1st degree more likely to develop disorder compared to 2% general population.

Twin Studies = 

• …