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Brain activity and meditation

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frequencies expressed in the alpha range, increased alpha band power, and an overall slowing (reduction in frequency) in EEG activity in experienced meditators versus less experienced meditators while meditating. The alpha blocking phenomenon, observed as a state change in brain function, was investigated as a possible trait change as well. One study that examined a variety of meditation techniques tried to show that alpha blocking was affected by the long term practice of meditation by testing response to auditory stimuli. Review works, however, comment on inconsistent findings as well as a lack of repeated results in this, and other studies. They further remark that, similar to observations in brain state changes, only general assertions can be made about brain trait changes: some change in the electroencephalographic profile exists but with some inconsistency. It is also important to note that these trait changes were observed during meditation, and although it does indicate that a practitioner's electroencephalographic profile is modified by the practice of meditation, these EEG studies have not yet shown changes in non-meditating brains, even of experienced meditators.
346:, Flanagan presents a more conservative viewpoint of current scientific research and cautions readers against the seemingly exciting results of recent studies. Flanagan does not believe current science supports the idea that positive emotion can be strengthened in the same way that stroke victims can recover use of limbs with use. Flanagan does acknowledge that meditation may be beneficial in some way, but the mechanism of how meditation affects the brain is still clouded. Similarly, Awasthi argues that meditation is non-specific to the research studies showing clinical efficacy in some cases, though mechanisms remain unclear. Flanagan and Hanson use many of the same scientific studies to attempt to support their differing viewpoint, but both authors identify the need and importance of future studies investigating meditation. Meditation research is still in its early stages and a lot more replicable results need to be established before the science community can back its efficiency. 152:(fMRI) is another highly utilized methodology for studying state changes in meditating brains. fMRI detects subtle increases in blood flow to areas of the brain with higher metabolic activity. Thus these areas of increased metabolic activity indicate which regions of the brain are currently being used to process whatever stimuli presented. Counter to EEG, the advantage of fMRI is its spatial resolution, with the ability to produce detailed spatial maps of brain activity. It suffers, however, in temporal resolution and cannot measure progressive activity, like the EEG, with much detail. 109:. Specifically, EEG measures the electric fields of large groups of neurons. EEG has the benefit of excellent temporal resolution and is able to measure aggregate activity of portions or the entire cortex down to the millisecond scale. Unlike other imaging based methods, EEG does not have good spatial resolution and is more appropriately used to evaluate the running spontaneous activity of the cortex. This spontaneous activity is classified into four main classifications based on the frequency of the activity, ranging from low frequency 133: 129:
activity. Alpha blocking is a phenomenon where the active brain, normally presenting beta wave activity, cannot as easily switch to alpha wave activity often involved in memory recall. These findings would suggest that in a meditative state a person is more relaxed but maintains a sharp awareness. Two large, comprehensive review works, however, point to poor control and statistical analyses in these early studies and comment that it can only be said with confidence that increased alpha and theta wave activity exists.
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al. found "consistent differences in prefrontal cortex and body awareness regions" in "areas key to meta-awareness..., exteroceptive and interoceptive body awareness..., memory consolidation and reconsolidation..., self and emotion regulation..., and intra- and interhemispheric communication..." and that changes were significant with "moderate" global median effect size and "consistent and medium-sized brain structure differences."
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results. Hanson's main argument is that positive emotions, like love can be strengthened through meditation in a neuroplastic manner, citing dozens of scientific studies to support this claim. Hanson's viewpoint is representative of a larger popular movement to study and embrace Eastern phenomena including meditation in the Western world.
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in books targeted for general audiences. One such book, Buddha's Brain by Rick Hanson, PhD shares the current scientific research and investigations into meditation. Hanson, a neuroscientist and researcher, explains to readers the scientific studies in plain language and discuss the impact of the
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In the meta-analysis performed by Fox et al., several sources of bias were indicated which bring into question the validity of meditation studies which use neuroimaging. Fox et al. suggests a publication bias may be leading to the over-reporting of significant results. Despite this, however, Fox et
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The brain state changes found in meditators are almost exclusively found in higher-order executive and association cortices. This supports the notion that meditation increases self-regulation and attentiveness. Recent studies have also investigated how these changes may alter the functionality and
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areas were shown to have increased activity during Zen meditation. Both studies comment on the possibility that these findings could indicate some state of heightened voluntary control over attention during mindfulness meditation. Review works by Cahn and Chiesa state that these results indicate
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Fox, Kieran C.R.; Nijeboer, Savannah; Dixon, Matthew L.; Floman, James L.; Ellamil, Melissa; Rumak, Samuel P.; Sedlmeier, Peter; Christoff, Kalina (June 2014). "Is meditation associated with altered brain structure? A systematic review and meta-analysis of morphometric neuroimaging in meditation
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Many studies on mindfulness meditation, assessed in a review by Cahn and Polich in 2006, have linked lower frequency alpha waves, as well as theta waves, to meditation. Much older studies report more specific findings, such as decreased alpha blocking and increased frontal lobe specific theta
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Similar to research into state changes in brain function, older studies make more specific claims about trait changes in meditators versus non-meditators. Changes to the alpha wave were indicated to be a trait, as well as state and phenomena. Studies have reported an increase in the specific
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Fox, Kieran C.R.; Nijeboer, Savannah; Dixon, Matthew L.; Floman, James L.; Ellamil, Melissa; Rumak, Samuel P.; Sedlmeier, Peter; Christoff, Kalina (2014). "Is meditation associated with altered brain structure? A systematic review and meta-analysis of morphometric neuroimaging in meditation
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The review by Cahn also notes findings describing a heightened emotional state of meditators. A more complex study, conducted in 2008 by Lutz et al., focused on emotional response during meditation. This investigation involved the creation of a "compassion meditation" state by novice and
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Long-term meditation practitioners have also shown to have a higher tolerance for pain. This effect has been correlated to altered function and structure in somatosensory cortices and an increased ability to decouple regions in the brain associated with the cognitive appraisal of pain
105:(EEG) has been used in many studies as a primary method for evaluating the meditating brain. Electroencephalography uses electrical leads placed all over the scalp to measure the collective electrical activity of the 66:
on the brain can be broken up into two categories: state changes and trait changes, respectively alterations in brain activities during the act of meditating and changes that are the outcome of long-term practice.
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Grant, Joshua A.; Courtemanche, Jérôme; Rainville, Pierre (January 2011). "A non-elaborative mental stance and decoupling of executive and pain-related cortices predicts low pain sensitivity in Zen meditators".
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consistency in meditation's effect on these regions of the brain, citing a multitude of other studies spanning other meditative disciplines, but mention the need for further investigation with better controls.
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pathways in the brains of individuals who meditate in comparison to individuals who do not. Of all areas with reported findings, a greater number of structural changes were found in the left hemisphere.
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Jang, Joon Hwan; Jung, Wi Hoon; Kang, Do-Hyung; Byun, Min Soo; Kwon, Soo Jin; Choi, Chi-Hoon; Kwon, Jun Soo (January 2011). "Increased default mode network connectivity associated with meditation".
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Holzel BK, Ott U, Hempel H, Hackl A, Wolf K, Stark R, Vaitl D (2007). "Differential engagement of anterior cingulate and adjacent medial frontal cortex in adept meditators and non-meditators".
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in response to the emotional sounds. The authors of this study believe this indicates greater sensitivity to emotional expression and positive emotion due to the neural circuitry activated.
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Stigsby B, Rodenberg JC, Moth HB (1981). "Electroencephalographic findings during mantra meditation (transcendental meditation). A controlled, quantitative study of experienced meditators".
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experienced meditators and testing the meditators response to emotionally charged sounds. fMRI results indicated heightened activity in the cingulate cortex but also in the
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which plays a role in learning, cognitive flexibility and attentional processing This could suggest a better attentiveness in aging meditators versus non-meditators.
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As a relatively new technology, fMRI has only recently been used to assess brain state changes during meditation. Studies have shown heightened activity in the
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volume associated with aging. One study found evidence that Zen meditators experienced a slower age related decline rate for cerebral gray matter volume in the
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Grant, J. A.; Rainville, P. (5 January 2009). "Pain Sensitivity and Analgesic Effects of Mindful States in Zen Meditators: A Cross-Sectional Study".
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Critics, like Owen Flanagan, PhD, believe that Hanson, and those like him, are overextending the results of current scientific studies. In his book
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of 21 neuroimaging studies, eight brain regions were found to be consistently altered, including areas key to meta-awareness (frontopolar cortex/
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during the latter half of the 20th century. Research on meditation sought to define and characterize various practices. The
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This article is about the specific effects of meditation on the human brain. For general information about meditation, see
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Chiesa A, Serretti, A (2010). "A systematic review of neurobiological and clinical features of mindfulness meditations".
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Pagnoni G, Cekic M (2007). "Age effects on gray matter volume and attentional performance in Zen meditation".
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Andersen J (2000). "Meditation meets behavioural medicine: The story of experimental research on meditation".
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Becker DE, Shapiro D (1981). "Physiological responses to clicks during Zen, yoga, and TM meditation".
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There is also evidence to suggest meditation plays a protective role against the natural reduction in
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Brain trait changes have also been observed in neuroimaging studies, most often employing fMRI. In a
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Cahn BR, Polich J (2006). "Meditation states and traits : EEG, ERP, and neuroimaging studies".
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Kasamatsu KH, Hirai T (1966). "An electroencephalographic study on the zen meditation (Zazen)".
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which had been shown to have heightened activity during meditation by experienced meditators.
117:(13–30 Hz) associated with an awake and alert brain. In between these two extremes are 63: 21: 1536: 1484: 1303: 702: 640: 301: 257: 8: 1745: 1719: 1701: 1526: 1464: 1298: 1220: 897: 74: 706: 644: 89:
describes mindfulness meditation as complete, unbiased attention to the current moment.
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Wherever You Go, There You Are : Mindfulness Meditation in Everyday Life
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Besides scientific literature, some authors have written of the promising
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Buddha's Brain: The Practical Neuroscience of Happiness, Love, and Wisdom
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More research will be needed before any firm conclusions can be made.
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Lutz A, Brefczynski-Lewis J, Johnstone T, Davidson RJ (2008).
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Vipassana : A Universal Buddhist Meditation Technique
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Electroencephalography and Clinical Neurophysiology
240:), exteroceptive and interoceptive body awareness ( 1108: 1055: 1053: 926: 184: 194:, temporo-parietal junction, and right posterior 1732: 113:(< 4 Hz) commonly found during sleep to 1115:. Oakland, CA: New Harbinger Publication, INC. 1050: 626: 540: 494: 202:Changes in brain due to the prolonged practice 1228: 782: 248:), memory consolidation and reconsolidation ( 20:. For the overall effects of meditation, see 883: 835: 833: 426:"Which Frequency/Hz Is Good For Meditation?" 50:became a focus of collaborative research in 1381:Shikantaza (Zen Buddhist seated meditation) 1294:Anapanasati (Buddhist breathing meditation) 1136: 1134: 1132: 490: 488: 356:Neural mechanisms of mindfulness meditation 206: 1685:The Varieties of the Meditative Experience 1235: 1221: 817: 456: 408: 1193: 1183: 1165: 1143:Bodhisattva's Brain: Buddhism Naturalized 1102: 1100: 830: 724: 714: 662: 652: 344:Bodhisattva's Brain: Buddhism Naturalized 155: 97: 92: 1140: 1129: 1063:Neuroscience & Biobehavioral Reviews 877: 843:Neuroscience & Biobehavioral Reviews 811: 536: 534: 485: 214: 131: 26: 1159: 741: 684: 682: 307: 1733: 1411:Zazen (Zen Buddhist seated meditation) 1106: 1097: 776: 620: 452: 450: 448: 446: 398:. New Delhi: Sri Satguru Publications. 378: 1216: 577: 531: 497:Psychiatry and Clinical Neurosciences 324: 319: 150:Functional magnetic resonance imaging 898:10.1016/j.neurobiolaging.2007.06.008 679: 393: 1371:Pranayama (yoga breathing practice) 443: 13: 797:10.1111/j.1469-8986.1981.tb01846.x 627:Pagnoni G, Cekic M, Guo Y (2008). 509:10.1111/j.1440-1819.1966.tb02646.x 383:. Tokyo: Kosei Publishing Company. 219:Red region of the brain shows the 14: 1767: 423: 227: 1715: 1714: 1329:Henosis (Neoplatonic meditation) 1145:. Cambridge, MA: The MIT Press. 820:Journal of Consciousness Studies 252:), self and emotion regulation ( 1075:10.1016/j.neubiorev.2014.03.016 1007: 963: 920: 855:10.1016/j.neubiorev.2014.03.016 185:Study on meditation and emotion 144: 1396:Transcendental meditation (TM) 1242: 417: 402: 387: 372: 294:dorsolateral prefrontal cortex 1: 1419:(tai chi standing meditation) 1401:Vipassanā (Silent meditation) 1359:Naam Japo (Sikism meditation) 1268:Meditation in popular culture 1258:Brain activity and meditation 366: 31:Highlighted region shows the 1319:Dhyāna (Buddhist meditation) 1028:10.1016/j.neulet.2010.10.056 941:10.1097/psy.0b013e31818f52ee 762:10.1016/0013-4694(81)90107-3 716:10.1371/journal.pone.0001897 654:10.1371/journal.pone.0003083 598:10.1016/j.neulet.2007.04.074 337: 7: 1349:Muraqabah (Sufi meditation) 471:10.1037/0033-2909.132.2.180 349: 10: 1772: 985:10.1016/j.pain.2010.10.006 15: 1710: 1694: 1676: 1575: 1432: 1324:Dhyāna (Hindu meditation) 1286: 1250: 555:10.1017/S0033291709991747 290:anterior cingulate cortex 254:anterior cingulate cortex 162:anterior cingulate cortex 85:, is frequently studied. 33:anterior cingulate cortex 1751:Mindfulness (psychology) 1185:10.3389/fpsyg.2012.00613 409:Kabat-Zinn, Jon (1998). 196:superior temporal sulcus 1741:Behavioral neuroscience 1273:Mind–body interventions 1172:Frontiers in Psychology 1141:Flanagan, Owen (2011). 1278:Research on meditation 929:Psychosomatic Medicine 543:Psychological Medicine 459:Psychological Bulletin 381:Essentials of Buddhism 379:Mizuno, Kogen (1972). 331:research on meditation 224: 207:Electroencephalography 156:Topographical findings 141: 103:Electroencephalography 98:Electroencephalography 93:Changes in brain state 48:central nervous system 36: 1445:Brainwave entrainment 1263:History of meditation 1107:Hanson, Rick (2009). 886:Neurobiology of Aging 413:. New York: Hyperion. 361:Effects of meditation 218: 135: 64:effects of meditation 30: 22:Effects of meditation 1485:Higher consciousness 1304:Christian meditation 1016:Neuroscience Letters 586:Neuroscience Letters 308:Validity of findings 302:default mode network 300:connectivity of the 258:orbitofrontal cortex 1702:Meditation and pain 1465:Conscious breathing 1299:Buddhist meditation 707:2008PLoSO...3.1897L 645:2008PLoSO...3.3083P 394:Ahir, D.C. (1999). 75:Buddhist meditation 1582:Focused attention 1354:New Age meditation 1334:Islamic meditation 1166:Awasthi B (2013). 325:Positive portrayal 320:Popular literature 225: 142: 121:(4–8 Hz) and 77:approach found in 42:and its effect on 37: 1728: 1727: 1666:Stephen Batchelor 1661:Martine Batchelor 1607:Multiple methods 1480:Guided meditation 1344:Jewish meditation 1309:Taoist meditation 892:(10): 1623–1627. 170:prefrontal cortex 1763: 1718: 1717: 1626:Joseph Goldstein 1237: 1230: 1223: 1214: 1213: 1208: 1207: 1197: 1187: 1163: 1157: 1156: 1138: 1127: 1126: 1114: 1104: 1095: 1094: 1061:practitioners". 1057: 1048: 1047: 1011: 1005: 1004: 967: 961: 960: 924: 918: 917: 881: 875: 874: 841:practitioners". 837: 828: 827: 815: 809: 808: 785:Psychophysiology 780: 774: 773: 745: 739: 738: 728: 718: 686: 677: 676: 666: 656: 624: 618: 617: 581: 575: 574: 549:(8): 1239–1252. 538: 529: 528: 492: 483: 482: 454: 441: 440: 438: 436: 430:Incense Junction 421: 415: 414: 406: 400: 399: 391: 385: 384: 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cortex 229: 226: 208: 205: 203: 200: 186: 183: 178:frontal cortex 166:frontal cortex 157: 154: 146: 143: 99: 96: 94: 91: 87:Jon Kabat-Zinn 73:meditation, a 44:brain activity 9: 6: 4: 3: 2: 1768: 1757: 1754: 1752: 1749: 1747: 1744: 1742: 1739: 1738: 1736: 1721: 1713: 1712: 1709: 1703: 1700: 1699: 1697: 1693: 1687: 1686: 1682: 1681: 1679: 1675: 1667: 1664: 1662: 1659: 1657: 1654: 1652: 1649: 1647: 1644: 1642: 1639: 1637: 1634: 1632: 1629: 1627: 1624: 1622: 1619: 1617: 1614: 1612: 1609: 1608: 1606: 1602: 1599: 1597: 1594: 1593: 1591: 1587: 1584: 1583: 1581: 1580: 1578: 1574: 1568: 1567:Visualization 1565: 1563: 1560: 1558: 1555: 1553: 1550: 1548: 1545: 1543: 1540: 1538: 1535: 1533: 1530: 1528: 1525: 1523: 1520: 1518: 1515: 1513: 1510: 1508: 1505: 1501: 1498: 1497: 1496: 1493: 1491: 1488: 1486: 1483: 1481: 1478: 1476: 1473: 1471: 1468: 1466: 1463: 1461: 1460:Concentration 1458: 1456: 1453: 1451: 1448: 1446: 1443: 1441: 1438: 1437: 1435: 1431: 1425: 1422: 1420: 1418: 1414: 1412: 1409: 1407: 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Index

Meditation
Effects of meditation

anterior cingulate cortex
central nervous system
neuroscience
psychology
neurobiology
effects of meditation
Mindfulness
Buddhist meditation
Zen
Vipassana
Jon Kabat-Zinn
Electroencephalography
cerebral cortex
delta waves
beta waves
theta waves
alpha waves

Amitābha
Functional magnetic resonance imaging
anterior cingulate cortex
frontal cortex
prefrontal cortex
cingulate cortex
frontal cortex
amygdala
superior temporal sulcus

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