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

Contents:

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

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.

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. 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.

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.

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. 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).

STUDY SAYS BRAS OF GAY MEN AND WOMEN ARE SIAR

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.

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.

Neverthels, our rults preclu the possibily that the morphologil differenc between homo- and heterosexual dividuals reflect atypil cerebral sex studi showed that the precentral gys is implited the regulatn of emotn and self-evaluatn51, cludg the perceptn of body image52. Homosexual men showed creased actnal amplu of low-equency fluctuatn (fALFF) the left postcentral gys54 pared to heterosexual men, whereas both heterosexual and homosexual dividuals exhibed higher activy of the post-central gys durg subjective aroal55. Sports engagement) or are at least partially ntgent on how much effort dividuals vt to obta putamen emerged as the only regn wh creased gray matter volume homosexual vers heterosexual dividuals but the difference was driven by homosexual women.

WHAT THE GAY BRA LOOKS LIKE

Although, to the bt of our knowledge, there is no evince for an associatn between sexual activy and bra morphologil phenotyp, future studi should asss markers of sexual activy to exame potential effects of genr atypily wh homosexual and heterosexual groups. Prev studi have also shown differenc bra archecture and activy between gay and straight people, but most relied on people’s rpons to sexualy driven cu that uld have been learned, such as ratg the attractivens of male or female fac.

“This study monstrat that homosexuals of both sex show strong cross-sex shifts bra symmetry, ” says Qazi Rahman, a leadg rearcher on sexual orientatn at Queen Mary llege, Universy of London, UK. “Paradoxilly, ’s more rmative to look at thgs that have no direct nnectn wh sexual orientatn, and that’s where this study sr, ” says Simon LeVay, a proment US thor who 1991 reported fdg differenc (pdf) a part of the bra lled the hypothalam between straight and gay men.

Most prev studi provi no rmatn about sexual orientatn or clud heterosexual ntrol groups [exceptns are20, who clud ntrols wh mixed sexual orientatn, and21 cludg only non-homosexual transgenr dividuals)]. Given prev observatns of a sex-reversed pattern of chemo-signal activatn, amygdala nnectivy, and hemispheric asymmetry cisgenr homosexual pared to cisgenr heterosexual men and women40, 41, 42, 43, we hypothized that among HoM and HoW there uld be signs of ls pronounced masculizatn/femizatn, or even a sex reversed pattern of FA, than among our HeM and HeW. Th, we tted whether whe matter sexual differentiatn the cisgenr homosexual and transgenr groups might be ls pronounced or even sex-reversed by referrg to their FA valu as beg sex-(a)typil, i.