Atypical Gender Development Flashcards
Gender dysphoria
Condition where individuals experience a mismatch between their biological sex and gender they feel they are
Ratio of MtF:FtM in UK 2012
5:1
Aproximately how many in UK
1 in 4000
When do indications occur
Fairly early e.g. children unhappy wearing clothing associated with biological sex
DSM-V diagnostic criteria for GD
- affects ability to function in everyday life
- discomfort in biological sex
- ongoing identification with opposite sex
- no biological disorder at the same time
- Symprtomes present for more than 6 months
- must be able to verbalise their thoughts
Biological explanation
Physical cause for the disorder
- brain sex theory
- genetic explanations
- phantom limb
Social psychological explanation
Assume a wider psychological cause that focuses on the individuals experiences in their environment
- Psychoanalytical - mother/son relationship
- Cognitive - dual pathway theory
Brain sex theory
- brain of someone with GD is not the same as the typcial brain of the gender they were assigned at birth
- look at areas of dimorphic difference e.g. bed nucleus of the stria terminals (BSTc): found in the thalamus and fully develops at the after of 5: in men it is 40% bigger than women
Brain sex theory evidence
Zhou
- post mortem on 6 MtF
- BSTc similiar size to cisgender F brain
- F brain in M born body
- therefore gender identity is determines before birth
Brain sex theory AO3 -
BSTc fully forms at the age of 5 so hormone treatment should not effect it however HULSHOFF POL ET AL showed hormone therapy influences the size of the BSTc
- therefore observed differences in the size may be due to hormone therapy rather than the cause
Phantom Limb
GD form of phantom limb syndrome but for genitals
2/3 FtM report phantom penis sensation from childhood
Phantom Limb Evidence
60% men without GD who have had penis amputation have experienced phantom penis however only 30% of MtF do.
10% FtM experience phantom breast sensations
- therefore somatosensory wiring is atypical in these people before their surgery
Genetic explanation
Some evidence suggests longer version of the androgen receptor gene in MtF may reduce the action of prenatal testosterone which results in an under masculine brain in foetus
Genetic Evidence - Coolidge
96MZ and 61DZ twin pairs assessed for GD
- 2.3% of 157 pairs with GD
- 62% of GD cases explained genetically
Genetic Evidence - Heylins
23MZ and 21DZ twin pairs where one has GD
- 9MZ twins with GD
- 0DZ twims with GD
- -> strong heritable component