Word: braine
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...human is to learn about how human abilities came to be. No other species uses full-blown language, for example. But animal communication is surprisingly complex. Primates in particular are able to do a lot of the mental tasks that are essential to grasping language. Regions of the brain once considered language centers have been discovered in monkeys; instead of handling language, they control mouth movements. Geneticists in recent years have found human genes essential to language; it turns out that similar versions of the same genes make communication possible in other animals, from squeaking mice to shrieking bats...
...elaborate ritual of dating is how this screening takes place. It's when that process pays off--when you finally feel you've found the right person--that the true-love thrill hits, and studies of the brain with functional magnetic resonance imagers (fMRIs) show why it feels so good. The earliest fMRIs of brains in love were taken in 2000, and they revealed that the sensation of romance is processed in three areas. The first is the ventral tegmental, a clump of tissue in the brain's lower regions, which is the body's central refinery for dopamine. Dopamine...
Fisher and her colleagues have conducted recent fMRI scans of people who are not just in love but newly in love and have found that their ventral tegmental areas are working particularly hard. "This little factory near the base of the brain is sending dopamine to higher regions," she says. "It creates craving, motivation, goal-oriented behavior--and ecstasy...
...of dopamine, the ventral tegmental couldn't do the love job on its own. Most people eventually do leave the poker game or the dinner table, after all. Something has to turn the exhilaration of a new partner into what can approach an obsession, and that something is the brain's nucleus accumbens, located slightly higher and farther forward than the ventral tegmental. Thrill signals that start in the lower brain are processed in the nucleus accumbens via not just dopamine but also serotonin and, importantly, oxytocin. If ever there was a substance designed to bind, it's oxytocin...
...last major stops for love signals in the brain are the caudate nuclei, a pair of structures on either side of the head, each about the size of a shrimp. It's here that patterns and mundane habits, such as knowing how to type and drive a car, are stored. Motor skills like those can be hard to lose, thanks to the caudate nuclei's indelible memory. Apply the same permanence to love, and it's no wonder that early passion can gel so quickly into enduring commitment. The idea that even one primal part of the brain is involved...