McFadden D, Pasanen E G
Department of Psychology and The Institute for Neuroscience, University of Texas, Austin, TX 78712, USA.
Proc Natl Acad Sci U S A. 1998 Mar 3;95(5):2709-13. doi: 10.1073/pnas.95.5.2709.
Click-evoked otoacoustic emissions (CEOAEs) are echo-like waveforms emitted by normal-hearing cochleas in response to a brief transient. CEOAEs are known to be stronger in females than in males. In this experiment, the CEOAEs of homosexual and bisexual females were found to be intermediate to those of heterosexual females and heterosexual males. A parsimonious explanation is that the auditory systems of homosexual and bisexual females, and the brain structures responsible for their sexual orientation, have been partially masculinized by exposure to high levels of androgens prenatally. No difference in CEOAEs was observed between homosexual and heterosexual males.
点击诱发耳声发射(CEOAEs)是正常听力的耳蜗对短暂瞬态刺激产生的类似回声的波形。已知CEOAEs在女性中比在男性中更强。在本实验中,发现同性恋和双性恋女性的CEOAEs介于异性恋女性和异性恋男性之间。一种简洁的解释是,同性恋和双性恋女性的听觉系统以及负责其性取向的脑结构在产前因暴露于高水平雄激素而部分男性化。在同性恋男性和异性恋男性之间未观察到CEOAEs有差异。