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Testosterone, the male sex hormone previously linked to aggression and criminality, may actually foster pro-social behaviors by increasing honesty in men. 
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If you want to know if he loves you so, a new study suggests that the secret may not be in his kiss, but in his far less romantic-sounding blood levels of oxytocin.
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The human body is much more mysterious than reductionist science would like us to believe. While Aristotle’s cardiocentric view lost the battle, it hasn’t necessarily lost the war. Despite the importance of the brain, the heart seems to be serving as an organ of intelligence in its own right.
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In frightening situations, people tend to freeze, but not recent moms, who charge ahead.
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A new study has shown that boosting the estrogen levels of male garter snakes causes them to secrete the same pheromones that females use to attract suitors, and turned the males into just about the sexiest snake in the neighborhood -- attracting...
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A biological experiment is turning out to have groundbreaking implications for ethics, as well as boosting the career of a high-flying B.C.-raised neuroscientist.
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Researchers have discovered a natural hormone that acts like exercise on muscle tissue—burning calories, improving insulin processing, and perhaps boosting strength. The scientists hope it could eventually be used as a treatment for obesity, diabetes, and, potentially, neuromuscular diseases like muscular dystrophy. In a paper published online today by the journal Nature, the scientists, led by Bruce Spiegelman at the Dana-Farber Cancer Institute in Boston, showed that the hormone occurs naturally in both mice and humans. It pushes cells to transform from white fat—globules that serve as reservoirs for excess calories—into brown fat, which generates heat. Because the hormone is present in both mice and humans, Spiegelman speculates that it may have served as an evolutionary defense against cold by triggering shivering. He named it irisin, after the Greek messenger goddess Iris, who allowed humans to communicate with the gods in Greek mythology, because exercise appears to "talk" to various tissues in the body via irisin. Via Wildcat2030
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(Medical Xpress) -- It’s been said that there are two kinds of eating: eating to survive, or satisfy hunger, and eating for pleasure. The pathways in the brain that control each urge have been studied independently.
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Biology may supply the rose-colored glasses that makes a "sexy cad" look like a "good dad."...
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A dose of oxytocin improves mind-reading. By Joshua Gowin, Ph.D....
Gina Stepp's comment,
March 4, 2012 5:51 PM
This must be why moms always know what their kids are thinking . . . those extra oxytocin receptor cells we got when they were born.
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You may have noticed that when you think positively, you tend to feel more relaxed and energetic. When you are upset, you are more likely to feel tired and lazy. These sensations are not coincidental. The way we think—our attitudes and outlook on life—strongly affects our physical state.
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The hormone oxytocin can be speedily delivered to the brain's fear center, a new study shows.
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Hormones shape our bodies, make us fertile, excite our most basic urges, and as scientists have known for years, they govern the behaviors that separate men from women. But how?
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The new evidence shows that the sex hormones – testosterone, estrogen, and progesterone – act in a key region of the brain, switching certain genes on and others off.
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Leiden researchers and their colleagues in Toronto investigated the effects of the hormone estrogen on spontaneous attention. They were hoping in this way to explain differences between the sexes. Women turned out to only be different from men when they had a high level of estrogen during their menstrual cycle. Via Paulo Furtado
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