Word: flowing
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...arginine: This naturally occurring amino acid is a precursor to nitric oxide and is believed to improve the flow of blood to the genitals...
...fingertips, clipped to their earlobes. The wires are connected to an array of computerized measuring devices that will track physiological data about them. As the couple discuss a glitch in their marriage, a technician in the next room monitors the data: heart rate, sweaty palms, the speed of blood flow. Another technician watches them on a video screen, recording facial expressions, calibrating emotional vital signs of couples during actual marital conflict. Survivor, Fear Factor--that's kid stuff. This is true reality...
...photograph of his or her beloved and looking at a "neutral" photograph of an acquaintance who generated no positive or negative romantic feelings. Meanwhile, I would use a functional magnetic resonance imaging (fMRI) machine to take pictures of the subject's brain. The fMRI machine records blood flow in the brain. It is based in part on a simple principle: brain cells that are active use more blood than quiescent brain parts in order to collect the oxygen they need to do their job. I had already invited Lucy Brown, a neuroscientist at the Albert Einstein school, to interpret...
...open at both ends and extends from above the head to about the waist. After taking preliminary scans to establish basic brain anatomy, the 12-min. experiment started. First the subject looked at the photograph of the beloved on the screen for 30 sec. as the scanner recorded blood flow in various brain regions. Next the subject was shown a large number and asked to count backward for 40 sec. The participant then looked at the neutral photograph for 30 sec. while the brain was scanned again. Finally the subject was shown another large number and asked to count backward...
Before we could understand the results of our scanning, we had to make an in-depth analysis of the brain pictures. The fMRI machine that we were using shows only blood-flow activity in specific brain regions rather than the chemicals involved. But because scientists know which kinds of nerves connect which kinds of brain regions, they can often surmise which brain chemicals are active when specific regions begin to glow...