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At its worst it leads to depression, suicide and even murder.In fact, our brain scanning studies (using f MRI) show that when a person is in love, they exhibit activity in the same brain regions that become active when one is addicted to cocaine and other drugs, including the nucleus accumbens and the ventral tegmental area (VTA), two primitive parts of the brain involved in the production and distribution of dopamine.After sifting through an enormous pile of research literature, she concludes that four chemicals play leading roles in determining who we are and who we're drawn to: two sex hormones, testosterone and estrogen; and two neurotransmitters, dopamine and serotonin. she uses them as building blocks to construct four distinct personality types.In Fisher's last book, Why We Love (2004), she broadly sketched out the influence of these molecules on our romantic lives. The Explorer, defined by high dopamine activity, is adventurous, novelty-seeking, creative.
They're the kind of introductions we had millions of years ago. You knew about people before you went out with them.
But the sex drive evolved to initiate mating with a range of partners; romantic love evolved to focus one's mating energy on one partner at a time; and attachment evolved to enable us to form a pair bond and rear young together as a team.