Gay bras stctured like those of the oppose sex | New Scientist

Contents:

• STUDY SAYS BRAS OF GAY MEN AND WOMEN ARE SIAR
• GAY BRAS STCTURED LIKE THOSE OF THE OPPOSE SEX
• STRAIGHT TALK ABOUT GAY BRAS

STUDY SAYS BRAS OF GAY MEN AND WOMEN ARE SIAR

For stance, early studi reported an almost two-fold volumetric crease of the suprachiasmatic nucls of the hypothalam16 but twice smaller volum of the third terstial nucls of the anterr hypothalam (INAH-3) homosexual (HoM) relative to heterosexual men (HeM) and no volumetric differenc the INAH-3 between heterosexual women (HeW) and HoM17.

Comparg the regnal rtil thickns and subrtil volum of heterosexual and homosexual mal revealed smaller thalam volum and thner right orboontal and right visual rtic HoM20. In another voxel-based morphometry (VBM) study on sexual orientatn, ls gray matter nsy was observed the ventral cerebellum, the left ventral premotor rtex, and the temporo-basal rtex homosexual relative to heterosexual women22. Furthermore, homosexualy seems to be associated wh ls distct cerebral sexual together, although extant fdgs suggt that human sexual orientatn is associated wh bra morphology, the heterogeneo and limed number of studi preclus a thorough unrstandg of the shared and distct nral signatur of sexual orientatn men and women.

MethodsParticipantsMRI data of 37 men (21 homosexual men = HoM; 16 heterosexual men = HeM) and 37 women (19 homosexual women = HoW; 18 heterosexual women = HeW) entered the analys (see Supplementary Table 1 for sample mographics; N = 74). Participants were reced through universy bullet boards, Lbian, Gay, Bisexual, Transgenr, and Queer or Qutng + (LGBTQ +) anizatns Aachen, Cologne and surroundg areas, and by word-of-mouth remendatn.

GAY BRAS STCTURED LIKE THOSE OF THE OPPOSE SEX

All participants were asked to dite their sexual orientatn at the time of measurement g a 1 to 4 sle rangg om (1) exclively homosexual, (2) predomantly homosexual, (3) bisexual, or (4) heterosexual. Homosexual participants were clud when self-intifyg as exclively and/or predomantly homosexual. Altogether, 19 homosexual men and 15 homosexual women intified as exclively homosexual, while two homosexual men and four homosexual women intified as predomantly homosexual.

3D T1-weighted MRI sns were reoriented to the termissural plane, rrected for field tensy homogenei, and spatially normalized onto MNI standard space.

STRAIGHT TALK ABOUT GAY BRAS

A homogeney check intified no outliers, th the GM volum of all 74 participants (21 HoM, 16 HeM, 19 HoW, 18 HeW) were clud subsequent analys: sexual orientatnFirst, whole-bra analys were performed g full factorial signs to pare GMV wh rpect to sexual orientatn (whole sample and per blogil sex, i. VBM ROI gray matter analys were performed on clters emergg om the heterosexual > homosexual and the reverse ntrast and masculy and femy sr om the BSRI qutnnaire. The rults suggt that HoM and HoW have a signifintly more externally oriented thkg style than HeM and HeW, rultg overall higher alexhymia levels for homosexual vs.

05 FWE-rrected at voxel level) revealed creased GMV the thalam, postcentral gys, middle occipal gys, precentral gys, middle temporal gys, and the cerebellum heterosexual pared to homosexual participants (see Fig. 1B, Table 2) 1Whole-bra v-FWE rrected VBM analys for the entire size imageTable 1 Clter list for ntrast heterosexual > homosexual all group (thrhold p < 0.