Quote from: Robertina on July 01, 2011, 11:13:51 AMour brains are probably more physically female than male, right?
The short answer appears to be,
yes...
http://www.ncbi.nlm.nih.gov/pubmed/19751389Neuroimaging differences in spatial cognition between men and male-to-female transsexuals before and during hormone therapy.
http://www.ncbi.nlm.nih.gov/pubmed/19341803Regional gray matter variation in male-to-female transsexualism.
http://www.ncbi.nlm.nih.gov/pubmed/18980961A sex difference in the hypothalamic uncinate nucleus: relationship to gender identity.
http://www.ncbi.nlm.nih.gov/pubmed/10843193Male-to-female transsexuals have female neuron numbers in a limbic nucleus.
http://www.ncbi.nlm.nih.gov/pubmed/829048Electroencephalographic changes in transsexualism (author's transl).
http://www.ncbi.nlm.nih.gov/pubmed/20132527Regional cerebral blood flow changes in female to male gender identity disorder.
http://www.ncbi.nlm.nih.gov/pubmed/18761592Specific cerebral activation due to visual erotic stimuli in male-to-female transsexuals compared with male and female controls: an fMRI study.
(I thought this one was interesting)
http://www.ncbi.nlm.nih.gov/pubmed/17875490Sexual differentiation of the brain and behavior.
Zhou JN, Hofman MA, Gooren LJ, Swaab DF. A sex difference in the human brain and its relation to transsexuality. Nature. 1995 Nov 2;378(6552):68-70.
This study corroborates Zhou et al
Kruijver FP, Zhou JN, Pool CW, Hofman MA, Gooren LJ, Swaab DF Male-to-female transsexuals have female neuron numbers in a limbic nucleus. J Clin Endocrinol Metab. 2000 May;85(5):2034-41
As does this one...
Garcia-Falgueras A, Swaab DF. A sex difference in the hypothalamic uncinate nucleus: relationship to gender identity. Brain. 2008 Dec;131(Pt 12):3132-46. Epub 2008 Nov 2.
More studies:
http://www.ncbi.nlm.nih.gov/pubmed/15854782Sex steroid-related genes and male-to-female transsexualism.
http://www.ncbi.nlm.nih.gov/pubmed/15724806Sexual differentiation of the human brain: relevance for gender identity, transsexualism and sexual orientation.
http://www.ncbi.nlm.nih.gov/pubmed/14560698Consequences of disturbed sex-hormone action in the central nervous system: behavioral, anatomical and functional changes.
http://www.ncbi.nlm.nih.gov/pubmed/12573812Androgens and male behavior.
http://www.ncbi.nlm.nih.gov/pubmed/7477289A sex difference in the human brain and its relation to transsexuality.
http://www.ncbi.nlm.nih.gov/pubmed/8850137Hormones and psychosexual differentiation.
http://www.ncbi.nlm.nih.gov/pubmed/1302528The clinico-biological aspects of transsexualism.
http://www.ncbi.nlm.nih.gov/pubmed/1778227Gene- and environment-dependent neuroendocrine etiogenesis of homosexuality and transsexualism.
http://www.ncbi.nlm.nih.gov/pubmed/3282489Neuroendocrine response to estrogen and brain differentiation in heterosexuals, homosexuals, and transsexuals.
http://www.ncbi.nlm.nih.gov/pubmed/7271684Neurobiological approaches in human behavior genetics.