Atypical Gender Development Flashcards
What is the other name of gender identity disorder?
Gender dysphoria
What is the ratio of people affected by gender dysphoria?
1 and 11000
What is DSM-5 diagnosis of gender dysphoria?
- Experience will affect ability to function in everyday life
- No biological disorder should occur at the same time
- Feel a strong sense of discomfort with their own biological sex
- Must experience ongoing identification with the opposite sex
Biological explanation for gender dysphoria:
This is the perception that dysphoria is physiologically determined
Define Gender Dysphoria:
Strong, persistent feelings of identification with opposite gender and discomfort with assigned gender
What does the Brain sex theory suggest?
-Dysphoria is caused by specific brain structures that are incompatible with a person’s biological sex.
Zhou (1995):
studied the bed nucleus of the stria terminalis (BSTc) which is assumed to be fully developed at age 5 and around 40% larger in males than females
Have postmortem studies provided any support for biological explanation of dysphoria?
Yes
How have post postmortems provided support for biological explanation?
Six male-to-female transgender individuals who had received feminising hormones, the BSTc was found to be a similar size to as heterosexual women
Kruijiver et al (2000):
Focused on number of neurons in the BSTc rather than the volume.
Findings of Kruijiver et al (2000):
six transgender individuals showed a similar number of neurons in the BSTc to those found in heterosexual women
Contradicatory evidence for BSTc
- The BSTc is fully formed at age 5 so hormone treatment should not have an effect on the BSTc
- But research has found that transgender hormone therapy did affect the size of the BSTc
- Chung (2002) claims that pre-natal hormonal influences (that affect the size of the BSTc) are not triggered until adulthood
Is there a genetic basis for gender dysphoria?
Yes
Method of Heylens et al (2012):
-23 MZ twins with 21 DZ twins where one of each pair was diagnosed with GID
Findings of Heylens et al (2012):
9 (39%) of the MZ twins was concordant for GID compared to none of the DZs which would indicate a role for genetic factors in the development of GID