explaining OCD

avatar
Created by
Grace

Cards (13)

  • genetic explanation of OCD
    genes are involved in individual vulnerability to OCD
  • Lewis study
    1936
    observed that 37% of his PCD patients had parents with OCD
    21% of OCD patients had siblings with OCD
    suggests OCD runs in the family
  • diathesis-stress model
    certain genes leave some people more likely to develop a mental disorder but it is not certain
    some environmental stress is necessary to trigger the condition
  • candidate genes
    candidate genes create vulnerability to OCD
    some of these genes are involved in the regulation of the development of serotonin
    e.g. 5HT1-D is implicated in the transport of serotonin across synapses
  • OCD is polygenic
    means OCD is not caused by one single gene but a combination of genetic variation that together increase vulnerability
  • Taylor research
    2013
    analysed findings of previous studies
    found evidence of up to 230 different genes that may be involved in OCD
    genes associate with the action of dopamine and serotonin that are both believed to have a role in mood regulation
  • different types of OCD
    genes that cause OCD in one person may not cause OCD in another
    aetiologically heterogenous= the origins of OCD vary from one person to another
  • strength of genetic explanation of OCD
    strong evidence base
  • strong evidence base
    suggest that some people are vulnerable to OCD as a result of their genetic make-up
  • Nested et al
    2010
    reviewed twin studies
    found 68% of identical twins shared OCD as opposed to 31% of non-identical twins
    suggests there is strong genetic influence
  • libation of genetic explanation
    environmental risk factor
  • environmental risk factor
    evidence that OCD does not appear to be entirely genetic
    environmental factors trigger or increase risk of OCD
    in only genetic all 100% of identical twins would share OCD
  • Cromer et al
    2007
    found that over half of OCD clients in their sample had experience a traumatic event in their past
    suggests environmental factors impact chances of OCD