Word: fmri
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Dates: during 2000-2009
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...more potent effects: its ability to dull pain. Whipple showed that gentle pressure on the G spot raised pain thresholds by 40% and that during orgasm women could tolerate up to 110% more pain. But she could not explain the link until the advent of functional magnetic resonance imaging (fMRI). Using fMRI to view the brains of easily orgasmic women as they climaxed, either with visual stimuli or by self-stimulation, Whipple found that the body's pain-killing center in the midbrain is activated during peak arousal. Signals from this part of the brain instruct the body to release...
...would collect data on brain activity while love-smitten subjects performed two separate tasks: looking at a 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...
They were not difficult to find. Students immediately began to call Aron's psychology lab to volunteer. Mashek weeded out those who had metal in their heads (such as lip, tongue or nose jewelry or braces on their teeth) that would affect the magnet in the fMRI machine. She also excluded those who were claustrophobic, those taking medication that could affect brain physiology, and men and women who were left-handed. Brain organization can vary with handedness, and we needed to standardize our sample as much as possible...
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...
...pulled the string, and Newberg released the dye into the subjects' arms. His results showed that the brain doesn't shut off when it meditates but rather blocks information from coming into the parietal lobe. Meanwhile, Benson took a group of highly focused Sikhs who could meditate while an fMRI machine clanked away, and he measured the blood flow in their brains. Overall blood flow was down, but in certain areas, including the limbic system (which generates emotions and memories and regulates heart rate, respiratory rate and metabolism...