Study Says Bras of Gay Men and Women Are Siar - Scientific Amerin

Contents:

• GAY BRAS STCTURED LIKE THOSE OF THE OPPOSE SEX
• STUDY SAYS BRAS OF GAY MEN AND WOMEN ARE SIAR
• BRAS OF GAY PEOPLE REMBLE THOSE OF STRAIGHT PEOPLE OF OPPOSE SEX
• BRAS DIFFERENT GAY, STRAIGHT PEOPLE

GAY BRAS STCTURED LIKE THOSE OF THE OPPOSE SEX

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).

STUDY SAYS BRAS OF GAY MEN AND WOMEN ARE SIAR

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. 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.

BRAS OF GAY PEOPLE REMBLE THOSE OF STRAIGHT PEOPLE OF OPPOSE SEX

Altogether, 19 homosexual men and 15 homosexual women intified as exclively homosexual, while two homosexual men and four homosexual women intified as predomantly homosexual. 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.

HeM heterosexual men; HoM homosexual men; HeW heterosexual women; HoW homosexual size imageTable 3 Clter list for ntrast heterosexual mal > homosexual mal (thrhold p < 0.

BRAS DIFFERENT GAY, STRAIGHT PEOPLE

05, FDR-rrected for multiple parisons) were intified for each clter for hetero- vers homosexual dividuals across the whole sample (irrpective of blogil sex) and men and women separately (sex-specific). Clter 1: Thalam (MNI 9, − 21, 9)The heterosexual > homosexual orientatn analysis (irrpective of blogil sex; whole sample) related this thalam seed to actn executn, perceptn, somthis, pa, and to fger tappg, pa monorg and discrimatn paradigms. Clter 2: Pre- and postcentral gys (MNI − 41, − 18, 66)Heterosexualy > homosexualy (whole-sample) analys related the pre-/post-central gys to actn executn, speech, perceptn, and somthis functnal domas, and to paradigms cludg fger tappg, drawg, flexn/extensn, and reward.

DiscsnIn this study we vtigated rti-subrtil gray matter volume differenc homosexual and heterosexual dividuals to addrs the sparse and heterogeneo fdgs on morphologil bra differenc associated wh sexual orientatn. In le wh our hypoth, we found that, relative to homosexual participants, heterosexual dividuals had signifintly higher GMV the thalam and precentral gys. Breakg the rults down by blogil sex, highlighted that hetero- vers homosexual women (HeW > HoW) showed larger GMV the precentral gys, while the reverse ntrast (HoW > HeW) revealed larger GMV the putamen.

In heterosexual and homosexual dividuals, the meddorsal thalam was more activated by fac of the preferred sex relative to fac of a ls sired sex, pennt of the observers’ blogil sex or sexual orientatn45. While ngently suggtg that hypothalamic activatn has downstream effects on visual perceptn likely impactg the selectn of sexual partners46, prev fdgs also support a role of the thalam signalg sexual reward47 and aroal among homosexual and heterosexual thalam has numero reciprol rti-thalamic nnectns wh reward and sensory-motor regns49.