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"We found a big effect – about a 40 percent reduction in pain intensity and a 57 percent reduction in pain unpleasantness. Meditation produced a greater reduction in pain than even morphine or other pain-relieving drugs, which typically reduce pain ratings by about 25 percent."
Both before and after meditation training, study participants' brain activity was examined using a special type of imaging -- arterial spin labeling magnetic resonance imaging (ASL MRI) -- that captures longer duration brain processes, such as meditation, better than a standard MRI scan of brain function.
The scans taken after meditation training showed that every participant's pain ratings were reduced, with decreases ranging from 11 to 93 percent, Zeidan said.
At the same time, meditation significantly reduced brain activity in the primary somatosensory cortex, an area that is crucially involved in creating the feeling of where and how intense a painful stimulus is. The scans taken before meditation training showed activity in this area was very high. However, when participants were meditating during the scans, activity in this important pain-processing region could not be detected. The research also showed that meditation increased brain activity in areas including the anterior cingulate cortex, anterior insula and the orbito-frontal cortex.
anterior insula
orbito-frontal cortex
More Food For Thought
The brain's ability to understand a whole scene on the fly "gives us an enormous edge on an organism that would have to look at objects one by one and slowly add them up,"
While previous research had already established the existence of this "scene-facilitation effect," the location of the part of the brain responsible for the effect remained a mystery.
"The 'where' in the brain gives us clues as to the 'how,'" Biederman said. This study is the latest in an ongoing effort by Biederman and Kim to unlock the complex way in which the brain processes visual experience. The goal, as Biederman puts it, is to understand "how we get mind from brain."
A recent study by Kim and Biederman suggested that the source of the scene-facilitation effect was the lateral occipital cortex, or LO, which is a portion of the brain's visual processing center located between the ear and the back of the skull. However, the possibility existed that the LO was receiving help from the intraparietal sulcus, or IPS, which is a groove in the brain closer to the top of the head.
By measuring how accurate participants were in detecting objects shown as interacting or not interacting when either the LO or IPS were zapped, researchers could see how much help that part of the brain was providing. The results were clear: zapping the LO eliminated the scene-facilitation effect. Zapping the IPS, however, did nothing.
Neuroeconomic research at the University of Pennsylvania has conclusively identified a part of the brain that is necessary for making everyday decisions about value. Previous functional magnetic imaging studies, during which researchers use a powerful magnet to determine which parts of a subjects brain are most active while doing a task, have suggested that the ventromedial frontal cortex, or VMF, plays an evaluative role during decision making.
I Love this Part
Kable's experiment involved a simple questionnaire, where people with and without VMF damage were asked to pick between groupings of juice boxes and chocolate bars, based on which they liked more.
The subjects were sequentially given 11 sheets of paper, which listed two or more groups they could choose. As an incentive for them to pick the one they truly wanted more, the researchers promised to give each subject one of the 11 groups he or she selected at the end of the experiment. The subjects were also able to pick what kind of juice and chocolate they preferred before the experiment began.
While there were no price tags on any of the items, the grouped items on each sheet had a fixed value relative to one another and the total amount that could be spent. A subject could pick between a group with six juice boxes and two chocolate bars, a group with three juice boxes and three chocolate bars and a group with no juice boxes and four chocolate bars, implying that the chocolate was three times as expensive as the juice.
Recently, researchers at the California Institute of Technology (Caltech) and Ireland's Trinity College Dublin hedged their bets—and came out winners—when they proposed that a certain region of the brain drives these different types of decision-making behaviors.
"Through our study, we found a difference in activity in a region of the brain called the dorsal striatum depending on whether people were choosing according to reinforcement learning or the gambler's fallacy," says John O'Doherty, professor of psychology at Caltech and adjunct professor of psychology at Trinity College Dublin. "This finding suggests that the dorsal striatum is particularly involved in driving reinforcement-learning behaviors."
Close To The Third Eye!
The team asked 31 participants to complete four roulette-wheel tasks while lying in an MRI scanner.
Originally posted by hazey
S+F for you sir. I have always been fascinated with the pineal gland and it's natural release of '___' and have lately been studying a lot about meditation. Anybody interested in learning more about the pineal gland should check out '___': Spirit Molecule by Rick Strassman. Very good book and some solid, independent research.
www.youtube.com...
Originally posted by AdamsMurmur
Imagine the activity of an enlightened individual, or at least someone who has meditated their whole life. Now, I want to see gland activity during meditation, especially by someone who has all their chakras open.
The basal ganglia are associated with a variety of functions, including voluntary motor control, procedural learning relating to routine behaviors or "habits" such as bruxism, eye movements, and cognitive,[1] emotional functions.[2] Currently popular theories implicate the basal ganglia primarily in action selection, that is, the decision of which of several possible behaviors to execute at a given time.[1][3] Experimental studies show that the basal ganglia exert an inhibitory influence on a number of motor systems, and that a release of this inhibition permits a motor system to become active. The "behavior switching" that takes place within the basal ganglia is influenced by signals from many parts of the brain, including the prefrontal cortex, which plays a key role in executive functions.[2
The basal ganglia play a central role in a number of neurological conditions, including several movement disorders. The most notable are Parkinson's disease, which involves degeneration of the melanin-pigmented dopamine-producing cells in the substantia nigra pars compacta (SNc), and Huntington's disease, which primarily involves damage to the striatum.[1][5] Basal ganglia dysfunction is also implicated in some other disorders of behavior control such as the Tourette's syndrome, ballismus (particularly hemibalismus), obsessive–compulsive disorder (OCD), and Wilson's disease (Hepatolenticular degeneration); except for Wilson's disease and hemiballismus, the neuropathological mechanisms underlying diseases of ganglia such as Parkinsons' and Huntington's are not very well understood or are at best still developing theories.
The basal ganglia have a limbic sector whose components are assigned distinct names: the nucleus accumbens (NA), ventral pallidum, and ventral tegmental area (VTA). VTA efferents provide dopamine to the nucleus accumbens (ventral striatum) in the same way that the substantia nigra provides dopamine to the dorsal striatum. Because there is much evidence that it plays a central role in reward learning, the VTA→NA dopaminergic projection has attracted a great deal of attention. For example, a number of highly addictive drugs, including coc aine, amphetamines, and nicotine, are thought to work by increasing the efficacy of the VTA→NA dopamine signal. There is also evidence implicating overactivity of the VTA dopaminergic projection in schizophrenia.[6]
Both before and after meditation training, study participants' brain activity was examined using a special type of imaging -- arterial spin labeling magnetic resonance imaging (ASL MRI) -- that captures longer duration brain processes, such as meditation, better than a standard MRI scan of brain function.