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According to a collaborative study on human sexuality, brains of homosexuals are structurally and functionally different from those of ‘heterosexuals’ or ‘straights’. The scientists from the study discovered that lesbians appear to have a lower proportion of grey matter (the cells that processes signals from the senses) in their brains than straight women. This gives their brains a more male like structure.
The research also revealed that brains of gay men appear to have structural similarities to those of heterosexual women. Earlier the brain scanning equipment was not so powerful as to highlight the differences in brain of homosexuals. However, with advancement in science and technology, the researchers at the Welcome Trust Centre for Neuroimaging at University College London, examined the brains of 80 men and women - including 16 gay men and 15 lesbians - using magnetic resonance imaging, or MRI. Different studies on homosexuality in the recent times have revealed that lesbians respond strongly to female hormones while brains of gay men have functional similarity to those of straight women.
