1 2720 116 YOGA MEDITATION PRACTITIONERS EXHIBIT GREATER GRAY MATTER VOLUME AND FEWER REPORTED COGNITIVE FAILURES: RESULTS OF A PRELIMINARY VOXEL-BASED MORPHOMETRIC ANALYSIS. HATHA YOGA TECHNIQUES, INCLUDING PHYSICAL POSTURES (ASANAS), BREATHING EXERCISES (PRANAYAMA), AND MEDITATION, INVOLVE THE PRACTICE OF MINDFULNESS. IN TURN, YOGA MEDITATION PRACTICES MAY INDUCE THE STATE OF MINDFULNESS, WHICH, WHEN EVOKED RECURRENTLY THROUGH REPEATED PRACTICE, MAY ACCRUE INTO TRAIT OR DISPOSITIONAL MINDFULNESS. PUTATIVELY, THESE CHANGES MAY BE MEDIATED BY EXPERIENCE-DEPENDENT NEUROPLASTIC CHANGES. THOUGH PRIOR STUDIES HAVE IDENTIFIED DIFFERENCES IN GRAY MATTER VOLUME (GMV) BETWEEN LONG-TERM MINDFULNESS PRACTITIONERS AND CONTROLS, NO STUDIES TO DATE HAVE REPORTED ON WHETHER YOGA MEDITATION IS ASSOCIATED WITH GMV DIFFERENCES. THE PRESENT STUDY INVESTIGATED GMV DIFFERENCES BETWEEN YOGA MEDITATION PRACTITIONERS (YMP) AND A MATCHED CONTROL GROUP (CG). THE YMP GROUP EXHIBITED GREATER GM VOLUME IN FRONTAL, LIMBIC, TEMPORAL, OCCIPITAL, AND CEREBELLAR REGIONS; WHEREAS THE CG HAD NO GREATER REGIONAL GREATER GMV. IN ADDITION, THE YMP GROUP REPORTED SIGNIFICANTLY FEWER COGNITIVE FAILURES ON THE COGNITIVE FAILURES QUESTIONNAIRE (CFQ), THE MAGNITUDE OF WHICH WAS POSITIVELY CORRELATED WITH GMV IN NUMEROUS REGIONS IDENTIFIED IN THE PRIMARY ANALYSIS. LASTLY, GMV WAS POSITIVELY CORRELATED WITH THE DURATION OF YOGA PRACTICE. RESULTS FROM THIS PRELIMINARY STUDY SUGGEST THAT HATHA YOGA PRACTICE MAY BE ASSOCIATED WITH THE PROMOTION OF NEUROPLASTIC CHANGES IN EXECUTIVE BRAIN SYSTEMS, WHICH MAY CONFER THERAPEUTIC BENEFITS THAT ACCRUE WITH REPEATED PRACTICE.	2012	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
2 2305  35 TRAINING ATTENTION FOR CONSCIOUS NON-REM SLEEP: THE YOGIC PRACTICE OF YOGA-NIDRA AND ITS IMPLICATIONS FOR NEUROSCIENCE RESEARCH. THE STUDY OF CONSCIOUSNESS WITHIN COGNITIVE NEUROSCIENCE HAS BEEN DOMINATED IN RECENT YEARS BY INVESTIGATIONS ORIGINATING FROM COLLABORATIONS BETWEEN NEUROSCIENTIFIC INVESTIGATORS AND BUDDHIST MEDITATION PRACTITIONERS. THE RESULTS HAVE BEEN REMARKABLE, PARTICULARLY WHEN QUANTITATIVE AND QUALITATIVE RESEARCH METHODS HAVE BEEN COMBINED AS THEY ARE IN THE NEUROPHENOMENOLOGICAL METHODOLOGY ORIGINATED BY FRANCISCO VARELA. THE ADDITION OF QUALITATIVE DATA ABOUT THE EXPERIENCE OF THE SUBJECT GREATLY ENRICHES THE INTERPRETIVE POTENTIAL OF QUANTITATIVE DATA AND HONORS THE ULTIMATE SUBJECTIVITY OF ALL PHENOMENA, IF WE ACCEPT CONSCIOUSNESS AS THE UNIVERSAL FIRST PRINCIPLE AS SOME QUANTUM PHYSICISTS NOW DO. THIS REMARKABLE PROGRESS, HOWEVER, HAS DROPPED A THREAD OF INQUIRY BEGUN IN THE LATE 1960S BY THE MENNINGER FOUNDATION IN TOPEKA, KANSAS (THE UNITED STATES) UNDER THE LEADERSHIP OF ELMER AND ALYCE GREEN. THEIR STUDIES OF THE CONSCIOUS CONTROL OF INVOLUNTARY PROCESSES DREW ON COLLABORATION WITH AN INDIAN MASTER OF YOGA MEDITATION, SWAMI RAMA OF THE HIMALAYAS, WHICH OPENED A NUMBER OF INTRIGUING POSSIBILITIES, WHICH HAVE YET TO BE FOLLOWED UP IN DETAIL WITH THE MOST RECENT RESEARCH TOOLS AND METHODOLOGIES. AMONG THESE IS THE ABILITY TO ENTER THE DEEPEST, NON-REM DELTA WAVE SLEEP WHILE MAINTAINING AWARENESS BOTH INTERNALLY AND OF ONE'S SURROUNDINGS (YOGA-NIDRA). THE PARTICULAR INTEREST IN THIS ABILITY LIES NOT ONLY IN THE BENEFITS THAT ACCRUE FROM ESPECIALLY DEEP RELAXATION AND AN ESPECIALLY PURE EXPERIENCE OF MINDFUL AWARENESS, BUT ALSO FROM THE YOGI'S DESCRIPTION OF THIS AS A WAY TO GRADUALLY LEARN TO ENTER THE DEEPEST STATES OF MEDITATION (SAMADHI) AND REMAIN THERE EVEN WHEN OTHERWISE ACTIVE IN THE WORLD (TURIYA). THIS CHAPTER IS ONE OF A SERIES HOPING TO ELUCIDATE THAT STATE FROM BOTH TRADITIONAL AND CONTEMPORARY DESCRIPTIONS OF THE STATE OF YOGA-NIDRA, DRAW MEASURABLE HYPOTHESES FROM THESE DESCRIPTIONS AND DISCUSS THE METHODOLOGICAL PROBLEMS OF CONDUCTING THESE INVESTIGATIONS WITH SUFFICIENTLY COMPETENT SAMPLES OF SUBJECTS. THE FOCUS OF THIS CHAPTER IS ON TRAINING SUBJECTS WHO CAN BECOME CAPABLE OF ENTERING THE STATE OF YOGA-NIDRA.	2019	
                                                                                                                                                                                                                                                                                                                   
3 1472  35 INSULAR CORTEX MEDIATES INCREASED PAIN TOLERANCE IN YOGA PRACTITIONERS. YOGA, AN INCREASINGLY POPULAR DISCIPLINE AMONG WESTERNERS, IS FREQUENTLY USED TO IMPROVE PAINFUL CONDITIONS. WE INVESTIGATED POSSIBLE NEUROANATOMICAL UNDERPINNINGS OF THE BENEFICIAL EFFECTS OF YOGA USING SENSORY TESTING AND MAGNETIC RESONANCE IMAGING TECHNIQUES. NORTH AMERICAN YOGIS TOLERATED PAIN MORE THAN TWICE AS LONG AS INDIVIDUALLY MATCHED CONTROLS AND HAD MORE GRAY MATTER (GM) IN MULTIPLE BRAIN REGIONS. ACROSS SUBJECTS, INSULAR GM UNIQUELY CORRELATED WITH PAIN TOLERANCE. INSULAR GM VOLUME IN YOGIS POSITIVELY CORRELATED WITH YOGA EXPERIENCE, SUGGESTING A CAUSAL RELATIONSHIP BETWEEN YOGA AND INSULAR SIZE. YOGIS ALSO HAD INCREASED LEFT INTRAINSULAR WHITE MATTER INTEGRITY, CONSISTENT WITH A STRENGTHENED INSULAR INTEGRATION OF NOCICEPTIVE INPUT AND PARASYMPATHETIC AUTONOMIC REGULATION. YOGIS, AS OPPOSED TO CONTROLS, USED COGNITIVE STRATEGIES INVOLVING PARASYMPATHETIC ACTIVATION AND INTEROCEPTIVE AWARENESS TO TOLERATE PAIN, WHICH COULD HAVE LED TO USE-DEPENDENT HYPERTROPHY OF INSULAR CORTEX. TOGETHER, THESE FINDINGS SUGGEST THAT REGULAR AND LONG-TERM YOGA PRACTICE IMPROVES PAIN TOLERANCE IN TYPICAL NORTH AMERICANS BY TEACHING DIFFERENT WAYS TO DEAL WITH SENSORY INPUTS AND THE POTENTIAL EMOTIONAL REACTIONS ATTACHED TO THOSE INPUTS LEADING TO A CHANGE IN INSULAR BRAIN ANATOMY AND CONNECTIVITY.	2014	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
4 1439  34 INCREASED GREY MATTER ASSOCIATED WITH LONG-TERM SAHAJA YOGA MEDITATION: A VOXEL-BASED MORPHOMETRY STUDY. OBJECTIVES: TO INVESTIGATE REGIONAL DIFFERENCES IN GREY MATTER VOLUME ASSOCIATED WITH THE PRACTICE OF SAHAJA YOGA MEDITATION. DESIGN: TWENTY THREE EXPERIENCED PRACTITIONERS OF SAHAJA YOGA MEDITATION AND TWENTY THREE NON-MEDITATORS MATCHED ON AGE, GENDER AND EDUCATION LEVEL, WERE SCANNED USING STRUCTURAL MAGNETIC RESONANCE IMAGING AND THEIR GREY MATTER VOLUME WERE COMPARED USING VOXEL-BASED MORPHOMETRY. RESULTS: GREY MATTER VOLUME WAS LARGER IN MEDITATORS RELATIVE TO NON-MEDITATORS ACROSS THE WHOLE BRAIN. IN ADDITION, GREY MATTER VOLUME WAS LARGER IN SEVERAL PREDOMINANTLY RIGHT HEMISPHERIC REGIONS: IN INSULA, VENTROMEDIAL ORBITOFRONTAL CORTEX, INFERIOR TEMPORAL AND PARIETAL CORTICES AS WELL AS IN LEFT VENTROLATERAL PREFRONTAL CORTEX AND LEFT INSULA. NO AREAS WITH LARGER GREY MATTER VOLUME WERE FOUND IN NON-MEDITATORS RELATIVE TO MEDITATORS. CONCLUSIONS: THE STUDY SHOWS THAT LONG-TERM PRACTICE OF SAHAJA YOGA MEDITATION IS ASSOCIATED WITH LARGER GREY MATTER VOLUME OVERALL, AND WITH REGIONAL ENLARGEMENT IN SEVERAL RIGHT HEMISPHERIC CORTICAL AND SUBCORTICAL BRAIN REGIONS THAT ARE ASSOCIATED WITH SUSTAINED ATTENTION, SELF-CONTROL, COMPASSION AND INTEROCEPTIVE PERCEPTION. THE INCREASED GREY MATTER VOLUME IN THESE ATTENTION AND SELF-CONTROL MEDIATING REGIONS SUGGESTS USE-DEPENDENT ENLARGEMENT WITH REGULAR PRACTICE OF THIS MEDITATION.	2016	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
5 1440  33 INCREASED HATHA YOGA EXPERIENCE PREDICTS LOWER BODY MASS INDEX AND REDUCED MEDICATION USE IN WOMEN OVER 45 YEARS. BACKGROUND: YOGA HAS BEEN SHOWN TO HAVE MANY SHORT-TERM HEALTH BENEFITS, BUT LITTLE IS KNOWN ABOUT THE EXTENT TO WHICH THESE BENEFITS ACCRUE OVER A LONG TIME FRAME OR WITH FREQUENT PRACTICE. AIMS: THE PURPOSE OF THIS STUDY WAS TO EXAMINE THE EXTENT TO WHICH BODY MASS INDEX (BMI) AND MEDICATION USE IN A SAMPLE OF FEMALE YOGA PRACTITIONERS OVER 45 YEARS VARIED ACCORDING TO THE LENGTH AND FREQUENCY OF YOGA PRACTICE. MATERIALS AND METHODS: WE ADMINISTERED ONLINE SURVEYS TO 211 FEMALE YOGA PRACTITIONERS AGED 45 TO 80 YEARS. WE USED REGRESSION ANALYSES TO EVALUATE THE RELATIONSHIP OF EXTENT OF YOGA EXPERIENCE TO BOTH BMI AND MEDICATION USE AFTER ACCOUNTING FOR AGE AND LIFESTYLE FACTORS. WE ALSO CONDUCTED COMPARISONS WITH 182 MATCHED CONTROLS. RESULTS: PARTICIPANTS HAD PRACTICED YOGA FOR AS LONG AS 50 YEARS AND FOR UP TO 28 HOURS PER WEEK. THERE WERE SIGNIFICANT INVERSE RELATIONSHIPS BETWEEN YOGA EXPERIENCE AND BOTH BMI AND MEDICATION LOAD. THESE SIGNIFICANT RELATIONSHIPS REMAINED AFTER ACCOUNTING FOR AGE AND LIFESTYLE FACTORS. WHEN WE COMPUTED YOGA EXPERIENCE IN TERMS OF TOTAL CALENDAR YEARS, WITHOUT ACCOUNTING FOR HOURS OF PRACTICE, SIGNIFICANT RELATIONSHIPS DID NOT REMAIN. HOWEVER, THERE WAS NO OBESITY IN THE 49 PARTICIPANTS WITH MORE THAN 25 YEARS OF YOGA PRACTICE. YOGA PRACTITIONERS WERE LESS LIKELY THAN NON-PRACTITIONERS TO USE MEDICATION FOR METABOLIC SYNDROME, MOOD DISORDERS, INFLAMMATION, AND PAIN. CONCLUSIONS: A LONG-TERM YOGA PRACTICE WAS ASSOCIATED WITH LITTLE OR NO OBESITY IN A NON-PROBABILITY SAMPLE OF WOMEN OVER 45 YEARS. RELATIONSHIPS SHOWED A DOSE-RESPONSE EFFECT, WITH INCREASED YOGA EXPERIENCE PREDICTING LOWER BMI AND REDUCED MEDICATION USE.	2011	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
6  571  16 DEFINING YOGA-NIDRA: TRADITIONAL ACCOUNTS, PHYSIOLOGICAL RESEARCH, AND FUTURE DIRECTIONS. THE TERM YOGA-NIDRA HAS BEEN USED IN MANY EMPIRICAL STUDIES TO REFER TO RELAXATION AND GUIDED IMAGERY. THESE TECHNIQUES DO NOT REPRESENT THE INTENTION OR PHYSIOLOGICAL CORRELATES OF YOGANIDRA DISCUSSED IN THE TRADITIONAL YOGA LITERATURE. WE PROPOSE AN OPERATIONAL DEFINITION OF YOGA-NIDRA THAT IS SUPPORTED BY SEVERAL PHYSIOLOGICALLY TESTABLE HYPOTHESES REGARDING ITS OUTCOMES AND EFFECTS. TRADITIONAL DESCRIPTIONS OF YOGA-NIDRA AND CONTEMPORARY ACCOUNTS OF ITS PRACTICE ARE REVIEWED, AND STUDIES EXAMINING THE PHYSIOLOGICAL CORRELATES OF YOGA-NIDRA ARE EXAMINED. PROPOSED HYPOTHESES FOR FUTURE RESEARCH USING THIS OPERATIONAL DEFINITION ARE PROVIDED.	2013	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
7 1286  40 GRAY MATTER AND FUNCTIONAL CONNECTIVITY IN ANTERIOR CINGULATE CORTEX ARE ASSOCIATED WITH THE STATE OF MENTAL SILENCE DURING SAHAJA YOGA MEDITATION. SOME MEDITATION TECHNIQUES TEACH THE PRACTITIONER TO ACHIEVE THE STATE OF MENTAL SILENCE. THE AIM OF THIS STUDY WAS TO INVESTIGATE BRAIN REGIONS THAT ARE ASSOCIATED WITH THEIR VOLUME AND FUNCTIONAL CONNECTIVITY (FC) WITH THE DEPTH OF MENTAL SILENCE IN LONG-TERM PRACTITIONERS OF SAHAJA YOGA MEDITATION. TWENTY-THREE LONG-TERM PRACTITIONERS OF THIS MEDITATION WERE SCANNED USING MAGNETIC RESONANCE IMAGING. IN ORDER TO IDENTIFY THE NEURAL CORRELATES OF THE DEPTH OF MENTAL SILENCE, WE TESTED WHICH GRAY MATTER VOLUMES (GMV) WERE CORRELATED WITH THE DEPTH OF MENTAL SILENCE AND WHICH REGIONS THESE AREAS WERE FUNCTIONALLY CONNECTED TO UNDER A MEDITATION CONDITION. GMV IN MEDIAL PREFRONTAL CORTEX INCLUDING ROSTRAL ANTERIOR CINGULATE CORTEX WERE POSITIVELY CORRELATED WITH THE SUBJECTIVE PERCEPTION OF THE DEPTH OF MENTAL SILENCE INSIDE THE SCANNER. FURTHERMORE, THERE WAS SIGNIFICANTLY INCREASED FC BETWEEN THIS AREA AND BILATERAL ANTERIOR INSULA/PUTAMEN DURING A MEDITATION-STATE SPECIFICALLY, WHILE DECREASED CONNECTIVITY WITH THE RIGHT THALAMUS/PARAHIPPOCAMPAL GYRUS WAS PRESENT DURING THE MEDITATION-STATE AND THE RESTING-STATE. THE CAPACITY OF LONG-TERM MEDITATORS TO ESTABLISH A DURABLE STATE OF MENTAL SILENCE INSIDE AN MRI SCANNER WAS ASSOCIATED WITH LARGER GRAY MATTER VOLUME IN A MEDIAL FRONTAL REGION THAT IS CRUCIAL FOR TOP-DOWN COGNITIVE, EMOTION AND ATTENTION CONTROL. THIS IS FURTHERMORE CORROBORATED BY INCREASED FC OF THIS REGION DURING THE MEDITATION-STATE WITH BILATERAL ANTERIOR INSULA/PUTAMEN, WHICH ARE IMPORTANT FOR INTEROCEPTION, EMOTION, AND ATTENTION REGULATION. THE FINDINGS HENCE SUGGEST THAT THE DEPTH OF MENTAL SILENCE IS ASSOCIATED WITH MEDIAL FRONTO-INSULAR-STRIATAL NETWORKS THAT ARE CRUCIAL FOR TOP-DOWN ATTENTION AND EMOTIONAL CONTROL.	2018	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
8 1668  50 NEUROCOGNITIVE CORRELATES OF THE EFFECTS OF YOGA MEDITATION PRACTICE ON EMOTION AND COGNITION: A PILOT STUDY. MINDFULNESS MEDITATION INVOLVES ATTENDING TO EMOTIONS WITHOUT COGNITIVE FIXATION OF EMOTIONAL EXPERIENCE. OVER TIME, THIS PRACTICE IS HELD TO PROMOTE ALTERATIONS IN TRAIT AFFECTIVITY AND ATTENTIONAL CONTROL WITH RESULTANT EFFECTS ON WELL-BEING AND COGNITION. HOWEVER, RELATIVELY LITTLE IS KNOWN REGARDING THE NEURAL SUBSTRATES OF MEDITATION EFFECTS ON EMOTION AND COGNITION. THE PRESENT STUDY INVESTIGATED THE NEUROCOGNITIVE CORRELATES OF EMOTION INTERFERENCE ON COGNITION IN YOGA PRACTITIONERS AND A MATCHED CONTROL GROUP (CG) UNDERWENT FMRI WHILE PERFORMING AN EVENT-RELATED AFFECTIVE STROOP TASK. THE TASK INCLUDES IMAGE VIEWING TRIALS AND STROOP TRIALS BRACKETED BY NEUTRAL OR NEGATIVE EMOTIONAL DISTRACTORS. DURING IMAGE VIEWING TRIALS, YOGA PRACTITIONERS EXHIBITED LESS REACTIVITY IN RIGHT DORSOLATERAL PREFRONTAL CORTEX (DLPFC) TO NEGATIVE AS COMPARED TO NEUTRAL IMAGES; WHEREAS THE CG HAD THE OPPOSITE PATTERN. A MAIN EFFECT OF VALENCE (NEGATIVE > NEUTRAL) WAS OBSERVED IN LIMBIC REGIONS (E.G., AMYGDALA), OF WHICH THE MAGNITUDE WAS INVERSELY RELATED TO DLPFC ACTIVATION. EXPLORATORY ANALYSES REVEALED THAT THE MAGNITUDE OF AMYGDALA ACTIVATION PREDICTED DECREASED SELF-REPORTED POSITIVE AFFECT IN THE CG, BUT NOT AMONG YOGA PRACTITIONERS. DURING STROOP TRIALS, YOGA PRACTITIONERS HAD GREATER ACTIVATION IN VENTROLATERAL PREFRONTAL CORTEX (VLPFC) DURING STROOP TRIALS WHEN NEGATIVE, COMPARED TO NEUTRAL, EMOTIONAL DISTRACTOR WERE PRESENTED; THE CG EXHIBITED THE OPPOSITE PATTERN. TAKEN TOGETHER, THESE DATA SUGGEST THAT THOUGH YOGA PRACTITIONERS EXHIBIT LIMBIC REACTIVITY TO NEGATIVE EMOTIONAL STIMULI, SUCH REACTIVITY DOES NOT HAVE DOWNSTREAM EFFECTS ON LATER MOOD STATE. THIS UNCOUPLING OF VIEWING NEGATIVE EMOTIONAL IMAGES AND AFFECT AMONG YOGA PRACTITIONERS MAY BE OCCASIONED BY THEIR SELECTIVE IMPLEMENTATION OF FRONTAL EXECUTIVE-DEPENDENT STRATEGIES TO REDUCE EMOTIONAL INTERFERENCE DURING COMPETING COGNITIVE DEMANDS AND NOT DURING EMOTIONAL PROCESSING PER SE.	2012	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
9 1545  44 LARGER WHOLE BRAIN GREY MATTER ASSOCIATED WITH LONG-TERM SAHAJA YOGA MEDITATION: A DETAILED AREA BY AREA COMPARISON. OBJECTIVES: OUR PREVIOUS STUDY SHOWED THAT LONG-TERM PRACTITIONERS OF SAHAJA YOGA MEDITATION (SYM) HAD AROUND 7% LARGER GREY MATTER VOLUME (GMV) IN THE WHOLE BRAIN COMPARED WITH HEALTHY CONTROLS; HOWEVER, WHEN TESTING INDIVIDUAL REGIONS, ONLY 5 SMALL BRAIN AREAS WERE STATISTICALLY DIFFERENT BETWEEN GROUPS. UNDER THE HYPOTHESIS THAT THOSE RESULTS WERE STATISTICALLY CONSERVATIVE, WITH THE SAME DATASET, WE INVESTIGATED IN MORE DETAIL THE REGIONAL DIFFERENCES IN GMV ASSOCIATED WITH THE PRACTICE OF SYM, WITH A DIFFERENT STATISTICAL APPROACH. DESIGN: TWENTY-THREE EXPERIENCED PRACTITIONERS OF SYM AND 23 HEALTHY NON-MEDITATORS MATCHED ON AGE, SEX AND EDUCATION LEVEL, WERE SCANNED USING STRUCTURAL MAGNETIC RESONANCE IMAGING (MRI). THEIR GMV WERE EXTRACTED AND COMPARED USING VOXEL-BASED MORPHOMETRY (VBM). USING A NOVEL AD-HOC GENERAL LINEAR MODEL, STATISTICAL COMPARISONS WERE MADE TO OBSERVE IF THE GMV DIFFERENCES BETWEEN MEDITATORS AND CONTROLS WERE STATISTICALLY SIGNIFICANT. RESULTS: IN THE 16 LOBE AREA SUBDIVISIONS, GMV WAS STATISTICALLY SIGNIFICANTLY DIFFERENT IN 4 OUT OF 16 AREAS: IN RIGHT HEMISPHERIC TEMPORAL AND FRONTAL LOBES, LEFT FRONTAL LOBE AND BRAINSTEM. IN THE 116 AAL AREA SUBDIVISIONS, GMV DIFFERENCE WAS STATISTICALLY SIGNIFICANT IN 11 AREAS. THE GMV DIFFERENCES WERE STATISTICALLY MORE SIGNIFICANT IN RIGHT HEMISPHERIC BRAIN AREAS. CONCLUSIONS: THE STUDY SHOWS THAT LONG-TERM PRACTICE OF SYM IS ASSOCIATED WITH LARGER GMV OVERALL, AND WITH SIGNIFICANT DIFFERENCES MAINLY IN TEMPORAL AND FRONTAL AREAS OF THE RIGHT HEMISPHERE AND THE BRAINSTEM. THESE NEUROPLASTIC CHANGES MAY REFLECT EMOTIONAL AND ATTENTIONAL CONTROL MECHANISMS DEVELOPED WITH SYM. ON THE OTHER HAND, OUR STATISTICAL AD-HOC METHOD SHOWS THAT THERE WERE MORE BRAIN AREAS WITH STATISTICAL SIGNIFICANCE COMPARED TO THE TRADITIONAL METHODOLOGY WHICH WE THINK IS SUSCEPTIBLE TO CONSERVATIVE TYPE II ERRORS.	2020	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
10 1641  25 MONITORING THE NEURAL ACTIVITY OF THE STATE OF MENTAL SILENCE WHILE PRACTICING SAHAJA YOGA MEDITATION. OBJECTIVE: TO IDENTIFY THE NEURAL CORRELATES OF THE STATE OF MENTAL SILENCE AS EXPERIENCED THROUGH SAHAJA YOGA MEDITATION. DESIGN: NINETEEN EXPERIENCED MEDITATORS UNDERWENT FUNCTIONAL MAGNETIC RESONANCE IMAGING DURING THREE SHORT CONSECUTIVE MEDITATION PERIODS, CONTRASTED WITH A CONTROL RELAXATION CONDITION. RESULTS: RELATIVE TO BASELINE, AT THE BEGINNING OF THE MEDITATION SESSIONS THERE WAS A SIGNIFICANT INCREASE OF ACTIVATION IN BILATERAL INFERIOR FRONTAL AND TEMPORAL REGIONS. ACTIVATION BECAME PROGRESSIVELY MORE REDUCED WITH DEEPER MEDITATION STAGES AND IN THE LAST MEDITATION SESSION IT BECAME LOCALIZED TO THE RIGHT INFERIOR FRONTAL CORTEX/ RIGHT INSULA AND RIGHT MIDDLE/SUPERIOR TEMPORAL CORTEX. FURTHERMORE, RIGHT INFERIOR FRONTAL ACTIVATION WAS DIRECTLY ASSOCIATED WITH THE SUBJECTIVE DEPTH OF THE MENTAL SILENCE EXPERIENCE. CONCLUSIONS: MEDITATORS APPEAR TO PASS THROUGH AN INITIAL INTENSE NEURAL SELF-CONTROL PROCESS NECESSARY TO SILENCE THEIR MIND. AFTER THIS THEY EXPERIENCE RELATIVELY REDUCED BRAIN ACTIVATION CONCOMITANT WITH THE DEEPENING OF THE STATE OF MENTAL SILENCE OVER RIGHT INFERIOR FRONTAL CORTEX, PROBABLY REFLECTING AN EFFORTLESS PROCESS OF ATTENTIONAL CONTEMPLATION ASSOCIATED WITH THIS STATE.	2015	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
11 1670  33 NEUROPROTECTIVE EFFECTS OF YOGA PRACTICE: AGE-, EXPERIENCE-, AND FREQUENCY-DEPENDENT PLASTICITY. YOGA COMBINES POSTURES, BREATHING, AND MEDITATION. DESPITE REPORTED HEALTH BENEFITS, YOGA'S EFFECTS ON THE BRAIN HAVE RECEIVED LITTLE STUDY. WE USED MAGNETIC RESONANCE IMAGING TO COMPARE AGE-RELATED GRAY MATTER (GM) DECLINE IN YOGIS AND CONTROLS. WE ALSO EXAMINED THE EFFECT OF INCREASING YOGA EXPERIENCE AND WEEKLY PRACTICE ON GM VOLUME AND ASSESSED WHICH ASPECTS OF WEEKLY PRACTICE CONTRIBUTED MOST TO BRAIN SIZE. CONTROLS DISPLAYED THE WELL DOCUMENTED AGE-RELATED GLOBAL BRAIN GM DECLINE WHILE YOGIS DID NOT, SUGGESTING THAT YOGA CONTRIBUTES TO PROTECT THE BRAIN AGAINST AGE-RELATED DECLINE. YEARS OF YOGA EXPERIENCE CORRELATED MOSTLY WITH GM VOLUME DIFFERENCES IN THE LEFT HEMISPHERE (INSULA, FRONTAL OPERCULUM, AND ORBITOFRONTAL CORTEX) SUGGESTING THAT YOGA TUNES THE BRAIN TOWARD A PARASYMPATICALLY DRIVEN MODE AND POSITIVE STATES. THE NUMBER OF HOURS OF WEEKLY PRACTICE CORRELATED WITH GM VOLUME IN THE PRIMARY SOMATOSENSORY CORTEX/SUPERIOR PARIETAL LOBULE (S1/SPL), PRECUNEUS/POSTERIOR CINGULATE CORTEX (PCC), HIPPOCAMPUS, AND PRIMARY VISUAL CORTEX (V1). COMMONALITY ANALYSES INDICATED THAT THE COMBINATION OF POSTURES AND MEDITATION CONTRIBUTED THE MOST TO THE SIZE OF THE HIPPOCAMPUS, PRECUNEUS/PCC, AND S1/SPL WHILE THE COMBINATION OF MEDITATION AND BREATHING EXERCISES CONTRIBUTED THE MOST TO V1 VOLUME. YOGA'S POTENTIAL NEUROPROTECTIVE EFFECTS MAY PROVIDE A NEURAL BASIS FOR SOME OF ITS BENEFICIAL EFFECTS.	2015	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
12 1191  29 EVOLUTION FROM FOUR MENTAL STATES TO THE HIGHEST STATE OF CONSCIOUSNESS: A NEUROPHYSIOLOGICAL BASIS OF MEDITATION AS DEFINED IN YOGA TEXTS. THIS CHAPTER PROVIDES A THEORETICAL INTRODUCTION TO STATES OF CONSCIOUSNESS AND REVIEWS NEUROSCIENTIFIC INVESTIGATIONS OF MEDITATION. THE DIFFERENT STATES OF CONSCIOUSNESS CONSIST OF FOUR MENTAL STATES, I.E., CANCALATA (RANDOM THINKING), EKAGRATA (NON-MEDITATIVE FOCUSING), DHARNA (FOCUSED MEDITATION), AND DHYANA (MEDITATION) AS DEFINED IN YOGA TEXTS. MEDITATION IS A SELF-REGULATED MENTAL PROCESS ASSOCIATED WITH DEEP RELAXATION AND INCREASED INTERNALIZED ATTENTION. SCIENTIFIC INVESTIGATIONS ON MEDITATION REPORTED CHANGES IN ELECTROPHYSIOLOGICAL SIGNALS AND NEUROIMAGING MEASURES. BUT MOST OUTCOMES OF MEDITATION STUDIES SHOWED INCONSISTENT RESULTS, THIS MAY BE DUE TO HETEROGENEITY IN MEDITATION METHODS AND TECHNIQUES EVOLVED IN THE LAST 200 YEARS. TRADITIONALLY, THE FEATURES OF MEDITATION INCLUDE THE CAPACITY TO SUSTAIN A HEIGHTENED AWARENESS OF THOUGHTS, BEHAVIORS, EMOTIONS, AND PERCEPTIONS. GENERALLY, MEDITATION INVOLVES NON-REACTIVE EFFORTLESS MONITORING OF THE CONTENT OF EXPERIENCE FROM MOMENT TO MOMENT. FOCUSED MEDITATION PRACTICE INVOLVES AWARENESS ON A SINGLE OBJECT AND OPEN MONITORING MEDITATION IS A NON-DIRECTIVE MEDITATION INVOLVED ATTENTION IN BREATHING, MANTRA, OR SOUND. THEREFORE, RESULTS OF FEW EMPIRICAL STUDIES OF ADVANCED MEDITATORS OR BEGINNERS REMAIN TENTATIVE. THIS IS AN ATTEMPT TO COMPILE THE MEDITATION-RELATED CHANGES IN ELECTROPHYSIOLOGICAL AND NEUROIMAGING PROCESSES AMONG EXPERIENCED AND NOVICE PRACTITIONERS.	2019	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
13 2537  30 YOGA EXPERIENCE AS A PREDICTOR OF PSYCHOLOGICAL WELLNESS IN WOMEN OVER 45 YEARS. BACKGROUND: ALTHOUGH HIGH LEVELS OF SUBJECTIVE WELL-BEING (SWB) ARE COMMON IN OLD AGE, A SUBSET OF OLDER INDIVIDUALS IS DISPROPORTIONATELY VULNERABLE TO NEGATIVE AFFECT. YOGA HAS BEEN SHOWN TO HAVE MANY SHORT-TERM BENEFITS, BUT RESEARCHERS HAVE NOT DETERMINED WHETHER A LONG-TERM OR FREQUENT YOGA PRACTICE INCREASINGLY PROTECTS OLDER WOMEN FROM LOW LEVELS OF PSYCHOLOGICAL WELL-BEING. AIMS: THE PURPOSE OF THIS STUDY WAS TO EXAMINE THE EXTENT TO WHICH PSYCHOLOGICAL ATTITUDES, TRANSCENDENCE, MENTAL MASTERY, AND SUBJECTIVE VITALITY IN A SAMPLE OF FEMALE YOGA PRACTITIONERS OVER 45 YEARS VARIED ACCORDING TO THE LENGTH AND FREQUENCY OF YOGA PRACTICE. MATERIALS AND METHODS: WE ADMINISTERED ONLINE SURVEYS TO A NON-PROBABILITY SAMPLE OF 211 FEMALE YOGA PRACTITIONERS 45 TO 80. WE USED WEIGHTED LEAST SQUARES REGRESSION ANALYSES TO EVALUATE THE RELATIONSHIP OF EXTENT OF YOGA EXPERIENCE TO THE OUTCOME VARIABLES AFTER ACCOUNTING FOR AGE AND LIFESTYLE FACTORS. RESULTS: PARTICIPANTS HAD PRACTICED YOGA FOR AS LONG AS 50 YEARS AND FOR UP TO 28 H PER WEEK. THERE WERE SIGNIFICANT POSITIVE RELATIONSHIPS BETWEEN YOGA EXPERIENCE AND ALL OUTCOME VARIABLES. THESE SIGNIFICANT RELATIONSHIPS REMAINED AFTER ACCOUNTING FOR AGE AND LIFESTYLE FACTORS. WHEN WE COMPUTED YOGA EXPERIENCE IN TERMS OF TOTAL CALENDAR YEARS, WITHOUT ACCOUNTING FOR HOURS OF PRACTICE, SIGNIFICANT RELATIONSHIPS DID NOT REMAIN. TRANSCENDENCE OF THE ORDINARY WAS THE MOST STRONGLY ASSOCIATED WITH CURRENT YOGA PRACTICE FREQUENCY, AND POSITIVE PSYCHOLOGICAL ATTITUDES WERE THE MOST STRONGLY ASSOCIATED WITH TOTAL LIFETIME HOURS OF PRACTICE. CONCLUSIONS: AMONG A NON-PROBABILITY SAMPLE OF FEMALE YOGA PRACTITIONERS BETWEEN 45 AND 80 YEARS, INCREASED YOGA EXPERIENCE PREDICTED INCREASED LEVELS OF PSYCHOLOGICAL WELL-BEING. RESULTS SHOWED A DOSE-RESPONSE EFFECT, WITH YOGA EXPERIENCE EXERCISING AN INCREASINGLY PROTECTIVE EFFECT AGAINST LOW LEVELS OF SWB AND VITALITY.	2013	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
14 1897  36 RESTING STATE FUNCTIONAL CONNECTIVITY ASSOCIATED WITH SAHAJA YOGA MEDITATION. NEUROSCIENCE RESEARCH HAS SHOWN THAT MEDITATION PRACTICES HAVE EFFECTS ON BRAIN STRUCTURE AND FUNCTION. HOWEVER, FEW STUDIES HAVE COMBINED INFORMATION ON THE EFFECTS ON STRUCTURE AND FUNCTION IN THE SAME SAMPLE. LONG-TERM DAILY MEDITATION PRACTICE PRODUCES REPEATED ACTIVITY OF SPECIFIC BRAIN NETWORKS OVER YEARS OF PRACTICE, WHICH MAY INDUCE LASTING STRUCTURAL AND FUNCTIONAL CONNECTIVITY (FC) CHANGES WITHIN RELEVANT CIRCUITS. THE AIM OF OUR STUDY WAS THEREFORE TO IDENTIFY DIFFERENCES IN FC DURING THE RESTING STATE BETWEEN 23 SAHAJA YOGA MEDITATION EXPERTS AND 23 HEALTHY PARTICIPANTS WITHOUT MEDITATION EXPERIENCE. SEED-BASED FC ANALYSIS WAS PERFORMED DEPARTING FROM VOXELS THAT HAD SHOWN STRUCTURAL DIFFERENCES BETWEEN THESE SAME PARTICIPANTS. THE CONTRAST OF CONNECTIVITY MAPS YIELDED THAT MEDITATORS SHOWED INCREASED FC BETWEEN THE LEFT VENTROLATERAL PREFRONTAL CORTEX AND THE RIGHT DORSOLATERAL PREFRONTAL CORTEX BUT REDUCED FC BETWEEN THE LEFT INSULA AND THE BILATERAL MID-CINGULATE AS WELL AS BETWEEN THE RIGHT ANGULAR GYRUS AND THE BILATERAL PRECUNEUS/CUNEUS CORTICES. IT THUS APPEARS THAT LONG-TERM MEDITATION PRACTICE INCREASES DIRECT FC BETWEEN VENTRAL AND DORSAL FRONTAL REGIONS WITHIN BRAIN NETWORKS RELATED TO ATTENTION AND COGNITIVE CONTROL AND DECREASES FC BETWEEN REGIONS OF THESE NETWORKS AND AREAS OF THE DEFAULT MODE NETWORK.	2021	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
15 1669  26 NEUROPHYSIOLOGICAL AND NEUROCOGNITIVE MECHANISMS UNDERLYING THE EFFECTS OF YOGA-BASED PRACTICES: TOWARDS A COMPREHENSIVE THEORETICAL FRAMEWORK. DURING RECENT DECADES NUMEROUS YOGA-BASED PRACTICES (YBP) HAVE EMERGED IN THE WEST, WITH THEIR AIMS RANGING FROM FITNESS GAINS TO THERAPEUTIC BENEFITS AND SPIRITUAL DEVELOPMENT. YOGA IS ALSO BEGINNING TO SPARK GROWING INTEREST WITHIN THE SCIENTIFIC COMMUNITY, AND YOGA-BASED INTERVENTIONS HAVE BEEN ASSOCIATED WITH MEASUREABLE CHANGES IN PHYSIOLOGICAL PARAMETERS, PERCEIVED EMOTIONAL STATES, AND COGNITIVE FUNCTIONING. YBP TYPICALLY INVOLVE A COMBINATION OF POSTURES OR MOVEMENT SEQUENCES, CONSCIOUS REGULATION OF THE BREATH, AND VARIOUS TECHNIQUES TO IMPROVE ATTENTIONAL FOCUS. HOWEVER, SO FAR LITTLE IF ANY RESEARCH HAS ATTEMPTED TO DECONSTRUCT THE ROLE OF THESE DIFFERENT COMPONENT PARTS IN ORDER TO BETTER UNDERSTAND THEIR RESPECTIVE CONTRIBUTION TO THE EFFECTS OF YBP. A CLEAR OPERATIONAL DEFINITION OF YOGA-BASED THERAPEUTIC INTERVENTIONS FOR SCIENTIFIC PURPOSES, AS WELL AS A COMPREHENSIVE THEORETICAL FRAMEWORK FROM WHICH TESTABLE HYPOTHESES CAN BE FORMULATED, IS THEREFORE NEEDED. HERE WE PROPOSE SUCH A FRAMEWORK, AND OUTLINE THE BOTTOM-UP NEUROPHYSIOLOGICAL AND TOP-DOWN NEUROCOGNITIVE MECHANISMS HYPOTHESIZED TO BE AT PLAY IN YBP.	2015	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
16 2760  41 YOGA PRACTITIONERS UNIQUELY ACTIVATE THE SUPERIOR PARIETAL LOBULE AND SUPRAMARGINAL GYRUS DURING EMOTION REGULATION. CHRONIC STRESS CONTRIBUTES TO BOTH MENTAL AND PHYSICAL ILLNESS. A HIGH PREVALENCE AND COST OF STRESS-RELATED ILLNESSES NORTH AMERICA WARRANTS INVESTIGATION INTO ALTERNATIVE OR COMPLEMENTARY THERAPIES WHICH MAY HELP REDUCE ADVERSE REACTIONS TO STRESSFUL STIMULI. EMOTION REGULATION IS THE PROCESS OF MONITORING AND ADJUSTING EMOTIONAL RESPONSES TO ENVIRONMENTAL STIMULI AND STRESSORS. INDIVIDUALS WHO PARTICIPATE IN PHYSICAL ACTIVITY ARE LESS LIKELY TO HAVE ADVERSE RESPONSES TO POTENTIALLY STRESSFUL SITUATIONS, POTENTIALLY DUE TO ADAPTIONS IN EMOTION REGULATION. YOGA IS A FORM OF PHYSICAL ACTIVITY INVOLVING STRETCHING EXERCISES AND MEDITATION, THAT MAY LESSEN INDIVIDUALS' LEVELS OF STRESS AND ANXIETY AND IMPROVE EMOTION REGULATION. HIGH-FREQUENCY HEART RATE VARIABILITY (HF-HRV) IS CONSIDERED A MEASURE OF PARASYMPATHETIC NERVOUS SYSTEM (PNS) ACTIVITY DURING THE EMOTION REGULATION. MEASURING HRV AND BRAIN ACTIVITY USING FUNCTIONAL MAGNETIC RESONANCE IMAGING (FMRI) OFFERS A USEFUL, NONINVASIVE APPROACH TO EVALUATING "NEUROVISCERAL" COMPONENTS OF EMOTION REGULATION. WE AIMED TO DETERMINE WHETHER YOGA PRACTITIONERS (YP) EXHIBIT DIFFERENT PATTERNS OF BRAIN ACTIVATION COMPARED TO RECREATIONAL ATHLETES (RA) WITHOUT CURRENT YOGA EXPERIENCE, WHILE VIEWING EMOTIONALLY AROUSING VISUAL STIMULI. OUR SECONDARY AIM WAS TO EXAMINE POTENTIAL DIFFERENCES ACROSS GROUPS IN HRV THROUGHOUT THE PRESENTATION OF THESE STIMULI. ANALYSIS OF FMRI DATA DURING EXPOSURE TO EMOTION-EVOKING (EE) STIMULI REVEALED THAT THE YP GROUP ACTIVATED TWO UNIQUE BRAIN AREAS, NAMELY THE SUPERIOR PARIETAL LOBULE AND THE SUPRAMARGINAL GYRUS. THESE AREAS HAVE BEEN ASSOCIATED WITH ATTENTIONAL AWARENESS AND REDUCED EGOCENTRIC BIAS, PROCESSES THAT HAVE BEEN IMPLICATED IN EMOTION REGULATION BY OTHERS. THE RA GROUP ACTIVATED THE INFERIOR MIDDLE FRONTAL CORTEX, AN AREA ASSOCIATED WITH COGNITIVE REAPPRAISAL DURING EMOTION REGULATION. THE YP GROUP ALSO DEMONSTRATED A TREND TOWARDS A HIGHER RATIO OF LOW- TO HIGH-FREQUENCY HRV COMPARED TO THE RA GROUP. THE PRESENT FINDINGS SUPPORT THE PRESENCE OF EXPERIENCE-DEPENDENT NEUROVISCERAL MECHANISMS ASSOCIATED WITH EMOTION REGULATION. INDIVIDUALS WHO PRACTICE YOGA REGULATE THEIR NEUROVISCERAL RESPONSES TO POTENTIALLY STRESSFUL EXTERNAL STIMULI IN A DIFFERENT MANNER THAN RECREATIONAL ATHLETES WHO DO NOT ENGAGE IN YOGA PRACTICE. THE PRESENT STUDY HAD A SMALL SAMPLE SIZE (RA: N = 12; YP: N = 19), WHICH SHOULD BE TAKEN INTO ACCOUNT WHEN INTERPRETING THE RESULTS.	2018	

17 1555  34 LONG-TERM ASHTANGA YOGA PRACTICE DECREASES MEDIAL TEMPORAL AND BRAINSTEM GLUCOSE METABOLISM IN RELATION TO YEARS OF EXPERIENCE. BACKGROUND: YOGA IS INCREASINGLY POPULAR WORLDWIDE WITH SEVERAL PHYSICAL AND MENTAL BENEFITS, BUT THE UNDERLYING NEUROBIOLOGY REMAINS UNCLEAR. WHEREAS MANY STUDIES HAVE FOCUSED ON PURE MEDITATIONAL ASPECTS, THE TRIAD OF YOGA INCLUDES MEDITATION, POSTURES, AND BREATHING. WE CONDUCTED A CROSS-SECTIONAL STUDY COMPARING EXPERIENCED YOGA PRACTITIONERS TO YOGA-NAIVE HEALTHY SUBJECTS USING A MULTIPARAMETRIC 2 X 2 DESIGN WITH SIMULTANEOUS POSITRON EMISSION TOMOGRAPHY/MAGNETIC RESONANCE (PET/MR) IMAGING. METHODS: (18)F-FDG PET, MORPHOMETRIC AND DIFFUSION TENSOR IMAGING, RESTING STATE FMRI, AND MR SPECTROSCOPY WERE ACQUIRED IN 10 EXPERIENCED (4.8 +/- 2.3 YEARS OF REGULAR YOGA EXPERIENCE) YOGA PRACTITIONERS AND 15 MATCHED CONTROLS IN REST AND AFTER A SINGLE PRACTICE (YOGA PRACTICE AND PHYSICAL EXERCISE, RESPECTIVELY). RESULTS: IN REST, DECREASED REGIONAL GLUCOSE METABOLISM IN THE MEDIAL TEMPORAL CORTEX, STRIATUM, AND BRAINSTEM WAS OBSERVED IN YOGA PRACTITIONERS COMPARED TO CONTROLS (P < 0.0001), WITH A SIGNIFICANT INVERSE CORRELATION OF RESTING PARAHIPPOCAMPAL AND BRAINSTEM METABOLISM WITH YEARS OF REGULAR YOGA PRACTICE (RHO < - 0.63, P < 0.05). A SINGLE YOGA PRACTICE RESULTED IN SIGNIFICANT HYPERMETABOLISM IN THE CEREBELLUM (P < 0.0001). NONE OF THE MR MEASURES DIFFERED, BOTH AT REST AND AFTER INTERVENTION. CONCLUSIONS: EXPERIENCED YOGA PRACTITIONERS SHOW REGIONAL LONG-TERM DECREASES IN GLUCOSE METABOLISM RELATED TO YEARS OF PRACTICE. TO ELUCIDATE A POTENTIAL CAUSALITY, A PROSPECTIVE LONGITUDINAL STUDY IN YOGA-NAIVE INDIVIDUALS IS WARRANTED.	2020	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
18 1266  31 FLUID INTELLIGENCE AND BRAIN FUNCTIONAL ORGANIZATION IN AGING YOGA AND MEDITATION PRACTITIONERS. NUMEROUS STUDIES HAVE DOCUMENTED THE NORMAL AGE-RELATED DECLINE OF NEURAL STRUCTURE, FUNCTION, AND COGNITIVE PERFORMANCE. PRELIMINARY EVIDENCE SUGGESTS THAT MEDITATION MAY REDUCE DECLINE IN SPECIFIC COGNITIVE DOMAINS AND IN BRAIN STRUCTURE. HERE WE EXTENDED THIS RESEARCH BY INVESTIGATING THE RELATION BETWEEN AGE AND FLUID INTELLIGENCE AND RESTING STATE BRAIN FUNCTIONAL NETWORK ARCHITECTURE USING GRAPH THEORY, IN MIDDLE-AGED YOGA AND MEDITATION PRACTITIONERS, AND MATCHED CONTROLS. FLUID INTELLIGENCE DECLINED SLOWER IN YOGA PRACTITIONERS AND MEDITATORS COMBINED THAN IN CONTROLS. RESTING STATE FUNCTIONAL NETWORKS OF YOGA PRACTITIONERS AND MEDITATORS COMBINED WERE MORE INTEGRATED AND MORE RESILIENT TO DAMAGE THAN THOSE OF CONTROLS. FURTHERMORE, MINDFULNESS WAS POSITIVELY CORRELATED WITH FLUID INTELLIGENCE, RESILIENCE, AND GLOBAL NETWORK EFFICIENCY. THESE FINDINGS REVEAL THE POSSIBILITY TO INCREASE RESILIENCE AND TO SLOW THE DECLINE OF FLUID INTELLIGENCE AND BRAIN FUNCTIONAL ARCHITECTURE AND SUGGEST THAT MINDFULNESS PLAYS A MECHANISTIC ROLE IN THIS PRESERVATION.	2014	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
19 1565  28 LOW AND THEN HIGH FREQUENCY OSCILLATIONS OF DISTINCT RIGHT CORTICAL NETWORKS ARE PROGRESSIVELY ENHANCED BY MEDIUM AND LONG TERM SATYANANDA YOGA MEDITATION PRACTICE. MEDITATION PROFICIENCY IS RELATED TO TRAIT-LIKE (LEARNED) EFFECTS ON BRAIN FUNCTION, DEVELOPED OVER TIME. PREVIOUS STUDIES SHOW INCREASES IN EEG POWER IN LOWER FREQUENCY BANDS (THETA, ALPHA) IN EXPERIENCED MEDITATORS IN BOTH MEDITATION STATES AND BASELINE CONDITIONS. HIGHER GAMMA BAND POWER HAS BEEN FOUND IN ADVANCED BUDDHIST MEDITATORS, YET IT IS NOT KNOWN IF THIS OCCURS IN YOGA MEDITATION PRACTICES. THIS STUDY USED ELORETA TO COMPARE DIFFERENCES IN CORTICAL SOURCE ACTIVITY UNDERLYING SCALP EEG FROM INTERMEDIATE (MEAN EXPERIENCE 4 YEARS) AND ADVANCED (MEAN EXPERIENCE 30 YEARS) AUSTRALIAN MEDITATORS FROM THE SATYANANDA YOGA TRADITION DURING A BODY-STEADINESS MEDITATION, MANTRA MEDITATION, AND NON-MEDITATION MENTAL CALCULATION CONDITION. INTERMEDIATE YOGA MEDITATORS SHOWED GREATER SOURCE ACTIVITY IN LOW FREQUENCIES (PARTICULARLY THETA AND ALPHA1) DURING MENTAL CALCULATION, BODY-STEADINESS AND MANTRA MEDITATION. A SIMILAR SPATIAL PATTERN OF SIGNIFICANT DIFFERENCES WAS FOUND IN ALL CONDITIONS BUT THE NUMBER OF SIGNIFICANT VOXELS WAS DOUBLE DURING BODY-STEADINESS AND MANTRA MEDITATION THAN IN THE NON-MEDITATION (CALCULATION) CONDITION. THESE DIFFERENCES WERE GREATEST IN RIGHT (R) SUPERIOR FRONTAL AND R PRECENTRAL GYRI AND EXTENDED BACK TO INCLUDE THE R PARIETAL AND OCCIPITAL LOBES. ADVANCED YOGA MEDITATORS SHOWED GREATER ACTIVITY IN HIGH FREQUENCIES (BETA AND ESPECIALLY GAMMA) IN ALL CONDITIONS BUT GREATLY EXPANDED DURING MEDITATION PRACTICE. ACROSS ALL CONDITIONS (MEDITATION AND NON-MEDITATION) DIFFERENCES WERE GREATEST IN THE SAME REGIONS: R INSULA, R INFERIOR FRONTAL GYRUS AND R ANTERIOR TEMPORAL LOBE. DISTINCT R CORE NETWORKS WERE IDENTIFIED IN ALPHA1 (8-10 HZ) AND GAMMA (25-42 HZ) BANDS, RESPECTIVELY. THE VOXELS RECRUITED TO THESE NETWORKS GREATLY EXPANDED DURING MEDITATION PRACTICE TO INCLUDE HOMOLOGOUS REGIONS OF THE LEFT HEMISPHERE. FUNCTIONAL INTERPRETATION PARALLELS TRADITIONALLY DESCRIBED STAGES OF DEVELOPMENT IN YOGA PROFICIENCY.	2014	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
20 1289  36 GREATER WIDESPREAD FUNCTIONAL CONNECTIVITY OF THE CAUDATE IN OLDER ADULTS WHO PRACTICE KRIPALU YOGA AND VIPASSANA MEDITATION THAN IN CONTROLS. THERE HAS BEEN A GROWING INTEREST IN UNDERSTANDING HOW CONTEMPLATIVE PRACTICES AFFECT BRAIN FUNCTIONAL ORGANIZATION. HOWEVER, MOST STUDIES HAVE RESTRICTED THEIR EXPLORATION TO PREDEFINED NETWORKS. FURTHERMORE, SCIENTIFIC COMPARISONS OF DIFFERENT CONTEMPLATIVE TRADITIONS ARE LARGELY LACKING. HERE WE EXPLORED DIFFERENCES IN WHOLE BRAIN RESTING STATE FUNCTIONAL CONNECTIVITY BETWEEN EXPERIENCED YOGA PRACTITIONERS, EXPERIENCED MEDITATORS, AND MATCHED CONTROLS. ANALYSES WERE REPEATED IN AN INDEPENDENT SAMPLE OF EXPERIENCED MEDITATORS AND MATCHED CONTROLS. ANALYSES UTILIZING NETWORK-BASED STATISTICS (ZALESKY ET AL., 2010) REVEALED DIFFERENCE COMPONENTS FOR YOGA PRACTITIONERS > CONTROLS AND MEDITATORS > CONTROLS IN WHICH THE RIGHT CAUDATE WAS A CENTRAL NODE. FOLLOW UP ANALYSES REVEALED THAT YOGA PRACTITIONERS AND MEDITATORS HAD SIGNIFICANTLY GREATER DEGREE CENTRALITY IN THE CAUDATE THAN CONTROLS. THIS GREATER DEGREE CENTRALITY WAS NOT DRIVEN BY SINGLE CONNECTIONS BUT BY GREATER CONNECTIVITY BETWEEN THE CAUDATE AND NUMEROUS BRAIN REGIONS. FINDINGS OF GREATER CAUDATE CONNECTIVITY IN MEDITATORS THAN IN CONTROLS WAS REPLICATED IN AN INDEPENDENT DATASET. THESE FINDINGS SUGGEST THAT YOGA AND MEDITATION PRACTITIONERS HAVE STRONGER FUNCTIONAL CONNECTIVITY WITHIN BASAL GANGLIA CORTICO-THALAMIC FEEDBACK LOOPS THAN NON-PRACTITIONERS. ALTHOUGH WE COULD NOT PROVIDE EVIDENCE FOR ITS MECHANISTIC ROLE, THIS GREATER CONNECTIVITY MIGHT BE RELATED TO THE OFTEN REPORTED EFFECTS OF MEDITATION AND YOGA ON BEHAVIORAL FLEXIBILITY, MENTAL HEALTH, AND WELL-BEING.	2015