Bisexual and Heterosexual

The neuronal response of excitement to female and male erotic images, Bisexual and Heterosexual, is almost identical between women of different sexual orientation.

The functional magnetic resonance imaging , or better know as fMRI is a technique that allows toobtain images of brain activity while performing a task . The use of fMRI is necessary to obtain information from the most internal parts of the human brain . Through this type of tests, a group of researchers has analyzed the neuronal response to the arousal of women of different sexual condition.

With a total of 76 volunteers (all with an age range ranging from 25 to 50 years),  scientists investigated the changes in the brain of the subjects when viewing a series of images and erotic videos . Women were classified into  three different categories : homosexual ,  heterosexual  and  bisexual .

The  focus of attention  was on  the ventral stria-tum, an area of ​​the brain associated with desire.   

The aim was to expand the previous findings of the  sexual psycho-physiology literature  , in which it is suggested that homosexual women have greater specificity (in relation to heterosexual and bisexual women) in their responses to  male and female erotic stimuli.

The results showed that  the subjective and neural responses  of homosexual women reflected a greater influence on female stimuli, compared to  bisexual and heterosexual women,  whose responses  did not differ significantly .

These same patterns  were studied with complete brain analysis , with homosexual women who showed specific triggering in areas of  visual and auditory processing.

On the other hand,  bisexual women  tend to show more combined patterns . 

These are more receptive to female stimuli in the areas of  sensory processing  and in the opposite way, activation’s more receptive to male stimuli in the areas associated with  social cognition .

 Conclusions of the study

Although the presented neuronal data align with the previously observed patterns in the genital and subjective arousal of women, the truth is that the relationship between excitation patterns, orientation and the development of sexual motivation towards certain sexes is still unknown.

According to the researchers, the study supports previous findings that indicate that women tend not to show potentially specific responses to erotic stimuli, while, in particular, homosexual women show a somewhat higher specificity than heterosexual and bisexual women .

Looking to the future , it is hoped that future research will explore to what extent women’s non-specific sexual response contributes to erotic plasticity (ie, sexual change in relation to context) and sexual fluency (ie, change over time).



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