1 499 133 COMBINED YOGA AND TRANSCRANIAL DIRECT CURRENT STIMULATION INCREASE FUNCTIONAL CONNECTIVITY AND SYNCHRONIZATION IN THE FRONTAL AREAS. TRANSCRANIAL DIRECT CURRENT STIMULATION (TDCS) IS A NON-INVASIVE NEURO-STIMULATION TECHNIQUE THAT CAN MODULATE CORTICAL EXCITABILITY. SIMILARLY, YOGA IS SHOWN TO AFFECT THE BRAIN'S NEURAL ACTIVITY AND NETWORKS. HERE, WE AIMED TO INVESTIGATE THE EFFECT OF COMBINED YOGA AND TDCS ON BRAIN OSCILLATIONS AND NETWORKS USING RESTING-STATE ELECTROENCEPHALOGRAPHY RECORDINGS. IN A RANDOMIZED, CROSS-OVER, DOUBLE-BLIND DESIGN, TWENTY-TWO HEALTHY SUBJECTS PARTICIPATED IN A YOGA/ACTIVE TDCS SESSION (2 MA; 20 MIN; ANODE-F3, CATHODE F4) OR YOGA/SHAM TDCS ON 2 SEPARATE DAYS. RESTING-STATE EEG DATA WERE COLLECTED BEFORE AND AFTER EACH INTERVENTION. POWER SPECTRAL DENSITY (PSD) AND FUNCTIONAL CONNECTIVITY, MEASURED BY A SYNCHRONIZATION MEASURE, PHASE-LOCKING VALUE, WERE COMPUTED FOR EACH CONDITION. THERE WERE NO SIGNIFICANT DIFFERENCES IN PSD VALUES AMONG THE TWO INTERVENTIONS. THE NETWORK-BASED STATISTIC METHOD WAS EMPLOYED FOR DETECTING FUNCTIONAL CONNECTIVITY DIFFERENCES BETWEEN YOGA/ACTIVE AND YOGA/SHAM TDCS INTERVENTIONS. RESULTS SHOW THAT THE ADDITION OF ACTIVE TDCS TO YOGA IS ASSOCIATED WITH INCREASED FUNCTIONAL CONNECTIVITY OF THE SCALP AND SOURCE EEG DATA IN THE FRONTAL AREA. THE CHANGES WERE WIDESPREAD, INTRA-HEMISPHERIC, AND INTER-HEMISPHERIC CONNECTIONS, WHICH WERE MAINLY BETWEEN THE FRONTAL AREA TO OTHER REGIONS. AT THE SOURCE LEVEL, MOST OF THE CONNECTIVITY CHANGES WERE FOUND IN THE FRONTO-PARIETAL NETWORK. THESE FINDINGS SUGGEST THAT COMBINING YOGA WITH TDCS MIGHT LEAD TO BRAIN NETWORK CHANGES RELATED TO THE EXECUTIVE AND ATTENTIONAL FUNCTIONS. 2022 2 1089 22 EFFECTS OF YOGA ON THE AUTONOMIC NERVOUS SYSTEM, GAMMA-AMINOBUTYRIC-ACID, AND ALLOSTASIS IN EPILEPSY, DEPRESSION, AND POST-TRAUMATIC STRESS DISORDER. A THEORY IS PROPOSED TO EXPLAIN THE BENEFITS OF YOGA PRACTICES IN DIVERSE, FREQUENTLY COMORBID MEDICAL CONDITIONS BASED ON THE CONCEPT THAT YOGA PRACTICES REDUCE ALLOSTATIC LOAD IN STRESS RESPONSE SYSTEMS SUCH THAT OPTIMAL HOMEOSTASIS IS RESTORED. IT IS HYPOTHESIZED THAT STRESS INDUCES (1) IMBALANCE OF THE AUTONOMIC NERVOUS SYSTEM (ANS) WITH DECREASED PARASYMPATHETIC NERVOUS SYSTEM (PNS) AND INCREASED SYMPATHETIC NERVOUS SYSTEM (SNS) ACTIVITY, (2) UNDERACTIVITY OF THE GAMMA AMINO-BUTYRIC ACID (GABA) SYSTEM, THE PRIMARY INHIBITORY NEUROTRANSMITTER SYSTEM, AND (3) INCREASED ALLOSTATIC LOAD. IT IS FURTHER HYPOTHESIZED THAT YOGA-BASED PRACTICES (4) CORRECT UNDERACTIVITY OF THE PNS AND GABA SYSTEMS IN PART THROUGH STIMULATION OF THE VAGUS NERVES, THE MAIN PERIPHERAL PATHWAY OF THE PNS, AND (5) REDUCE ALLOSTATIC LOAD. DEPRESSION, EPILEPSY, POST TRAUMATIC STRESS DISORDER (PTSD), AND CHRONIC PAIN EXEMPLIFY MEDICAL CONDITIONS THAT ARE EXACERBATED BY STRESS, HAVE LOW HEART RATE VARIABILITY (HRV) AND LOW GABAERGIC ACTIVITY, RESPOND TO PHARMACOLOGIC AGENTS THAT INCREASE ACTIVITY OF THE GABA SYSTEM, AND SHOW SYMPTOM IMPROVEMENT IN RESPONSE TO YOGA-BASED INTERVENTIONS. THE OBSERVATION THAT TREATMENT RESISTANT CASES OF EPILEPSY AND DEPRESSION RESPOND TO VAGAL NERVE STIMULATION CORROBORATES THE NEED TO CORRECT PNS UNDERACTIVITY AS PART OF A SUCCESSFUL TREATMENT PLAN IN SOME CASES. ACCORDING TO THE PROPOSED THEORY, THE DECREASED PNS AND GABAERGIC ACTIVITY THAT UNDERLIES STRESS-RELATED DISORDERS CAN BE CORRECTED BY YOGA PRACTICES RESULTING IN AMELIORATION OF DISEASE SYMPTOMS. THIS HAS FAR-REACHING IMPLICATIONS FOR THE INTEGRATION OF YOGA-BASED PRACTICES IN THE TREATMENT OF A BROAD ARRAY OF DISORDERS EXACERBATED BY STRESS. 2012 3 1691 25 OXYGEN CONSUMPTION AND RESPIRATION DURING AND AFTER TWO YOGA RELAXATION TECHNIQUES. CYCLIC MEDITATION (CM) IS A TECHNIQUE WHICH COMBINES "STIMULATING" AND "CALMING" PRACTICES, BASED ON A STATEMENT IN ANCIENT YOGA TEXTS SUGGESTING THAT SUCH A COMBINATION MAY BE ESPECIALLY HELPFUL TO REACH A STATE OF MENTAL EQUILIBRIUM. THE OXYGEN CONSUMPTION, BREATH RATE AND BREATH VOLUME OF 50 MALE VOLUNTEERS (GROUP MEAN AGE+/-SD, 27+/-6.3 YEARS) WERE ASSESSED BEFORE, DURING, AND AFTER SESSIONS OF CM AND SESSIONS OF SUPINE REST IN THE CORPSE POSTURE (SHAVASANA, SH). THE SESSIONS WERE ONE DAY APART AND THE ORDER WAS ALTERNATED. THE OXYGEN CONSUMPTION, BREATH RATE AND BREATH VOLUME INCREASED DURING THE "STIMULATING" PRACTICES OF CM, RETURNED TO THE BASELINE DURING THE "CALMING" PRACTICES, AND THE OXYGEN CONSUMPTION DECREASED BY 19.3 PERCENT BELOW BASELINE VALUES AFTER CM. DURING THE SH SESSION THE OXYGEN CONSUMPTION, BREATH RATE AND BREATH VOLUME REDUCED; HOWEVER THE DECREASE IN OXYGEN CONSUMPTION AFTER SH WAS LESS THAN AFTER CM (I.E., 4.8 PERCENT). THE RESULTS SUPPORT THE IDEA THAT A COMBINATION OF YOGA POSTURES WITH SUPINE REST (IN CM) REDUCES THE OXYGEN CONSUMPTION MORE THAN RESTING SUPINE ALONE DOES. 2006 4 1692 27 OXYGEN CONSUMPTION AND RESPIRATION FOLLOWING TWO YOGA RELAXATION TECHNIQUES. THE PRESENT STUDY WAS CONDUCTED TO EVALUATE A STATEMENT IN ANCIENT YOGA TEXTS THAT SUGGESTS THAT A COMBINATION OF BOTH "CALMING" AND "STIMULATING" MEASURES MAY BE ESPECIALLY HELPFUL IN REACHING A STATE OF MENTAL EQUILIBRIUM. TWO YOGA PRACTICES, ONE COMBINING "CALMING AND STIMULATING" MEASURES (CYCLIC MEDITATION) AND THE OTHER, A "CALMING" TECHNIQUE (SHAVASAN), WERE COMPARED. THE OXYGEN CONSUMPTION, BREATH RATE, AND BREATH VOLUME OF 40 MALE VOLUNTEERS (GROUP MEAN +/- SD, 27.0 +/- 5.7 YEARS) WERE ASSESSED BEFORE AND AFTER SESSIONS OF CYCLIC MEDITATION (CM) AND BEFORE AND AFTER SESSIONS OF SHAVASAN (SH). THE 2 SESSIONS (CM, SH) WERE 1 DAY APART. CYCLIC MEDITATION INCLUDES THE PRACTICE OF YOGA POSTURES INTERSPERSED WITH PERIODS OF SUPINE RELAXATION. DURING SH THE SUBJECT LIES IN A SUPINE POSITION THROUGHOUT THE PRACTICE. THERE WAS A SIGNIFICANT DECREASE IN THE AMOUNT OF OXYGEN CONSUMED AND IN BREATH RATE AND AN INCREASE IN BREATH VOLUME AFTER BOTH TYPES OF SESSIONS (2-FACTOR ANOVA, PAIRED T TEST). HOWEVER, THE MAGNITUDE OF CHANGE ON ALL 3 MEASURES WAS GREATER AFTER CM: (1) OXYGEN CONSUMPTION DECREASED 32.1% AFTER CM COMPARED WITH 10.1% AFTER SH; (2) BREATH RATE DECREASED 18.0% AFTER CM AND 15.2% AFTER SH; AND (3) BREATH VOLUME INCREASED 28.8% AFTER CM AND 15.9% AFTER SH. THESE RESULTS SUPPORT THE IDEA THAT A COMBINATION OF YOGA POSTURES INTERSPERSED WITH RELAXATION REDUCES AROUSAL MORE THAN RELAXATION ALONE DOES. 2000 5 690 45 EFFECT OF COMBINED YOGA AND TRANSCRANIAL DIRECT CURRENT STIMULATION INTERVENTION ON WORKING MEMORY AND MINDFULNESS. TRANSCRANIAL DIRECT STIMULATION, A NON-INVASIVE NEUROSTIMULATION TECHNIQUE FOR MODULATING CORTICAL EXCITABILITY, AND YOGA HAVE BOTH RESPECTIVELY BEEN SHOWN TO POSITIVELY AFFECT COGNITION. WHILE PRELIMINARY RESEARCH HAS SHOWN THAT COMBINED TRANSCRANIAL DIRECT STIMULATION AND MEDITATION MAY HAVE SYNERGISTIC EFFECTS ON MOOD AND COGNITION, THIS WAS THE FIRST STUDY TO EXPLORE THE COMBINATION OF TRANSCRANIAL DIRECT STIMULATION AND YOGA. TWENTY-TWO HEALTHY VOLUNTEERS WITH A REGULAR YOGA PRACTICE WERE RANDOMIZED TO RECEIVE EITHER ACTIVE TRANSCRANIAL DIRECT STIMULATION (ANODAL LEFT, CATHODAL RIGHT DORSOLATERAL PREFRONTAL CORTEX) FOLLOWED BY YOGA INTERVENTION OR SHAM TRANSCRANIAL DIRECT STIMULATION FOLLOWED BY YOGA INTERVENTION A DOUBLE-BLIND, CROSS-OVER DESIGN OVER TWO SEPARATE INTERVENTION DAYS. OUTCOME MEASURES INCLUDED WORKING MEMORY PERFORMANCE, MEASURED WITH THE N-BACK TASK AND MINDFULNESS STATE, MEASURED WITH THE TORONTO MINDFULNESS SCALE, AND WERE CONDUCTED OFFLINE, WITH PRE-POST ASSESSMENTS. TWENTY PARTICIPANTS COMPLETED BOTH DAYS OF THE INTERVENTION. ACTIVE TRANSCRANIAL DIRECT STIMULATION DID NOT HAVE A SIGNIFICANT EFFECT ON WORKING MEMORY OR LEVELS OF MINDFULNESS. THERE WAS A SIGNIFICANT PLACEBO EFFECT, WITH BETTER PERFORMANCE ON DAY 1 OF THE INTERVENTION, IRRESPECTIVE OF WHETHER PARTICIPANTS RECEIVED ACTIVE OR SHAM TRANSCRANIAL DIRECT STIMULATION. THERE WAS NO SIGNIFICANT DIFFERENCE BETWEEN ACTIVE VERSUS SHAM TRANSCRANIAL DIRECT STIMULATION CONCERNING WORKING MEMORY PERFORMANCE AND MINDFULNESS, WHICH MAY BE ACCOUNTED BY THE SMALL SAMPLE SIZE, THE TRANSIENT NATURE OF THE INTERVENTION, THE FACT THAT YOGA AND TRANSCRANIAL DIRECT STIMULATION CONCERNING WERE NOT CONDUCTED SIMULTANEOUSLY, AND THE SPECIFIC SITE OF STIMULATION. 2021 6 1836 23 PSYCHOPHYSIOLOGICAL CORRELATES OF THE PRACTICE OF TANTRIC YOGA MEDITATION. AUTONOMIC AND ELECTROENCEPHALOGRAPHIC (EEG) CORRELATES OF TANTRIC YOGA MEDITATION WERE STUDIED IN THREE GROUPS OF SUBJECTS AS THEY PROGRESSED FROM NORMAL CONSCIOUSNESS INTO MEDITATION. GROUPS DIFFERED IN THEIR LEVEL OF MEDITATION PROFICIENCY. MEASURES OF SKIN RESISTANCE, HEART RATE, RESPIRATION, AUTONOMIC ORIENTING RESPONSES, RESTING EEG, EEG ALPHA AND THETA FREQUENCIES, SLEEP-SCORED EEG, AVERAGED EVOKED RESPONSES, AND SUBJECTIVE EXPERIENCE WERE EMPLOYED. UNLIKE MOST PREVIOUSLY REPORTED MEDITATION STUDIES, PROFICIENT MEDITATORS DEMONSTRATED INCREASED AUTONOMIC ACTIVATION DURING MEDITATION WHILE UNEXPERIENCED MEDITATORS DEMONSTRATED AUTONOMIC RELAXATION. DURING MEDITATION, PROFICIENT MEDITATORS DEMONSTRATED INCREASED ALPHA AND THETA POWER, MINIMAL EVIDENCE OF EEG-DEFINED SLEEP, AND DECREASED AUTONOMIC ORIENTING TO EXTERNAL STIMULATION. AN EPISODE OF SUDDEN AUTONOMIC ACTIVATION WAS OBSERVED THAT WAS CHARACTERIZED BY THE MEDITATOR AS AN APPROACH TO THE YOGIC ECSTATIC STATE OF INTENSE CONCENTRATION. THESE FINDINGS CHALLENGE THE CURRENT "RELAXATION" MODEL OF MEDITATIVE STATES. 1978 7 2308 34 TRANSCRANIAL DIRECT CURRENT STIMULATION AND YOGA FOR FUNCTIONAL MOVEMENT DISORDERS. BACKGROUND: FUNCTIONAL MOVEMENT DISORDER (FMD), A CONVERSION DISORDER CHARACTERIZED BY INVOLUNTARY MOVEMENTS, IS DIFFICULT TO TREAT. METHODS: WE AIMED TO ASSESS THE EFFECTS OF ANODAL TRANSCRANIAL DIRECT CURRENT STIMULATION (TDCS) AND YOGA IN FMD PATIENTS (N=5). TDCS OF THE RIGHT TEMPOROPARIETAL JUNCTION, A BRAIN REGION RELEVANT IN THE SENSE OF SELF-AGENCY, WAS CONDUCTED. SUBJECTS UNDERWENT BOTH SHAM AND ANODAL TDCS WITH A WASHOUT PERIOD OF 3 WEEKS. YOGA WAS USED AS A MODE OF EXERCISE, AS WELL AS IN CONJUNCTION WITH STIMULATION TO SUSTAIN POTENTIAL CHANGES IN NEURAL PLASTICITY. RESULTS: A TOTAL OF 5 SUBJECTS COMPLETED THE STUDY [MEAN AGE: 52 (SE: 4) Y, DISEASE DURATION: 5 (SE: 1.6) Y], UNDERGOING BOTH SHAM AND ANODAL TDCS. ANODAL TDCS DOES NOT APPEAR TO BE SUPERIOR TO SHAM TDCS IN ALLEVIATING SYMPTOMS AND DISABILITY, BUT COMBINING TDCS AND YOGA APPEARS TO LEAD TO MILD IMPROVEMENT NOTED ON CLINICAL OBSERVATION, BASED ON THE CHANGE IN THE EFFICACY INDEX OF CLINICAL GLOBAL IMPRESSION FOUND IN 4 SUBJECTS. CONCLUSION: OUR STUDY RESULTS SUGGEST THAT ANODAL TDCS IS NOT SUPERIOR TO SHAM TDCS IN ALLEVIATING SUBJECTIVE SYMPTOMS AND DISABILITY IN FMD. HOWEVER, INTERPRETATION OF THESE RESULTS IS LIMITED DUE TO THE SMALL NUMBER OF STIMULATION SESSIONS AND NUMBER OF SUBJECTS. FUTURE STUDIES USING MORE FREQUENT STIMULATION SESSIONS ARE NEEDED TO FURTHER DETERMINE WHETHER ANODAL TDCS MAY HAVE A THERAPEUTIC EFFECT IN THIS PATIENT GROUP COMPARED WITH SHAM TDCS. 2021 8 433 17 CAN YOGA THERAPY STIMULATE STEM CELL TRAFFICKING FROM BONE MARROW? IT HAS BEEN ESTABLISHED THAT MESENCHYMAL STROMAL CELLS (MSCS) FROM BONE MARROW ENTER THE PERIPHERAL CIRCULATION INTERMITTENTLY FOR POSSIBLE TISSUE REGENERATION, REPAIR AND TO TAKE CARE OF DAILY WEAR AND TEAR. THIS IS EVIDENT FROM THE DETECTION OF MSCS FROM PERIPHERAL BLOOD. THE FACTORS GOVERNING THIS MIGRATION REMAIN ELUSIVE. THESE MSCS CARRY OUT THE WORK OF POLICING AND ARE SUPPOSED TO REPAIR THE INJURED TISSUES. THUS, THESE CELLS HELP IN MAINTAINING THE TISSUE AND ORGAN HOMEOSTASIS. YOGA AND PRANAYAMA ORIGINATED IN INDIA AND IS NOW BEING PRACTICED ALL OVER THE WORLD FOR POSITIVE HEALTH. SO FAR, THE CHEMICAL STIMULATION OF BONE MARROW HAS BEEN WIDELY USED EMPLOYING INJECTION OF COLONY STIMULATING FACTOR. HOWEVER, THE ROLE OF PHYSICAL FACTORS SUCH AS MECHANICAL STIMULATION AND STRETCHING HAS NOT BEEN SUBSTANTIATED. IT IS CLAIMED THAT PRACTICING YOGA DELAYS SENESCENCE, IMPROVES THE PHYSIOLOGICAL FUNCTIONS OF HEART AND LUNG AND YOGA POSTURES MAKE THE BODY ELASTIC. IT REMAINS TO BE SEEN WHETHER THE YOGA THERAPY PROMOTES TRAFFICKING OF THE STEM CELLS FROM BONE MARROW FOR POSSIBLE REPAIR AND REGENERATION OF WORN OUT AND DEGENERATING TISSUES. WE COVER IN THIS SHORT REVIEW, MAINLY THE ROLE OF PHYSICAL FACTORS ESPECIALLY THE YOGA THERAPY ON STEM CELLS TRAFFICKING FROM BONE MARROW. 2016 9 458 28 CHANGES IN P300 FOLLOWING TWO YOGA-BASED RELAXATION TECHNIQUES. CYCLIC MEDITATION (CM) IS A TECHNIQUE THAT COMBINES "STIMULATING" AND "CALMING" PRACTICES, BASED ON A STATEMENT IN ANCIENT YOGA TEXTS SUGGESTING THAT SUCH A COMBINATION MAY BE ESPECIALLY HELPFUL TO REACH A STATE OF MENTAL EQUILIBRIUM. THE CHANGES IN THE PEAK LATENCY AND PEAK AMPLITUDE OF P300 AUDITORY EVENT-RELATED POTENTIALS WERE STUDIED BEFORE AND AFTER THE PRACTICE OF CYCLIC MEDITATION COMPARED TO AN EQUAL DURATION OF SUPINE REST IN 42 VOLUNTEERS (GROUP MEAN AGE +/- SD, 27 +/- 6.3 YEARS), FROM FZ, CZ, AND PZ ELECTRODE SITES REFERENCED TO LINKED EARLOBES. THE SESSIONS WERE ONE DAY APART AND THE ORDER WAS ALTERNATED. THERE WAS REDUCTION IN THE PEAK LATENCIES OF P300 AFTER CYCLIC MEDITATION AT FZ, CZ, AND PZ COMPARED TO THE "PRE" VALUES. A SIMILAR TREND OF REDUCTION IN P300 PEAK LATENCIES AT FZ, CZ, AND PZ WAS ALSO OBSERVED AFTER SUPINE REST, COMPARED TO THE RESPECTIVE "PRE" VALUES, ALTHOUGH THE MAGNITUDE OF CHANGE IN EACH CASE WAS LESS AFTER SUPINE REST COMPARED TO AFTER CYCLIC MEDITATION. THE P300 PEAK AMPLITUDES AFTER CM WERE HIGHER AT FZ, CZ, AND PZ SITES COMPARED TO THE "PRE" VALUES. IN CONTRAST, NO SIGNIFICANT CHANGES WERE OBSERVED IN THE P300 PEAK AMPLITUDES AT FZ, CZ, AND PZ AFTER SUPINE REST COMPARED TO THE RESPECTIVE "PRE" STATE. THE PRESENT RESULTS SUPPORT THE IDEA THAT "CYCLIC" MEDITATION ENHANCES COGNITIVE PROCESSES UNDERLYING THE GENERATION OF THE P300. 2006 10 2886 20 YOGA: BALANCING THE EXCITATION-INHIBITION EQUILIBRIUM IN PSYCHIATRIC DISORDERS. SOCIAL BEHAVIORAL DISTURBANCES ARE CENTRAL TO MOST PSYCHIATRIC DISORDERS. A DISEQUILIBRIUM WITHIN THE CORTICAL EXCITATORY AND INHIBITORY NEUROTRANSMITTER SYSTEMS UNDERLIES THESE DEFICITS. GAMMA-AMINOBUTYRIC ACID (GABA) AND GLUTAMATE ARE THE MOST ABUNDANT EXCITATORY AND INHIBITORY NEUROTRANSMITTERS IN THE BRAIN THAT CONTRIBUTE TO THIS EQUILIBRIUM. SEVERAL CONTEMPORARY THERAPIES USED IN TREATING PSYCHIATRIC DISORDERS, REGULATE THIS GABA-GLUTAMATE BALANCE. YOGA HAS BEEN STUDIED AS AN ADJUVANT TREATMENT ACROSS A BROAD RANGE OF PSYCHIATRIC DISORDERS AND IS SHOWN TO HAVE SHORT-TERM THERAPEUTIC GAINS. EMERGING EVIDENCE FROM RECENT CLINICAL IN VIVO EXPERIMENTS SUGGESTS THAT YOGA IMPROVES GABA-MEDIATED CORTICAL-INHIBITORY TONE AND ENHANCES PERIPHERAL OXYTOCIN LEVELS. THIS IS LIKELY TO HAVE A MORE CONTROLLED DOWNSTREAM RESPONSE OF THE HYPOTHALAMO-PITUITARY-ADRENAL SYSTEM BY MEANS OF REDUCED CORTISOL RELEASE AND HENCE A BLUNTED SYMPATHETIC RESPONSE TO STRESS. ANIMAL AND EARLY FETAL DEVELOPMENTAL STUDIES SUGGEST AN INTER-DEPENDENT ROLE OF OXYTOCIN AND GABA IN REGULATING SOCIAL BEHAVIORS. IN KEEPING WITH THESE OBSERVATIONS, WE PROPOSE AN INTEGRATED NEUROBIOLOGICAL MODEL TO STUDY THE MECHANISMS OF THERAPEUTIC BENEFITS WITH YOGA. APART FROM PROVIDING A NEUROSCIENTIFIC BASIS FOR APPLYING A TRADITIONAL SYSTEM OF PRACTICE IN THE CLINICAL SETTING, THIS MODEL CAN BE USED AS A FRAMEWORK FOR STUDYING YOGA MECHANISMS IN FUTURE CLINICAL TRIALS. 2019 11 2776 19 YOGA SCHOOL OF THOUGHT AND PSYCHIATRY: THERAPEUTIC POTENTIAL. YOGA IS A TRADITIONAL LIFE-STYLE PRACTICE USED FOR SPIRITUAL REASONS. HOWEVER, THE PHYSICAL COMPONENTS LIKE THE ASANAS AND PRANAYAAMAS HAVE DEMONSTRATED PHYSIOLOGICAL AND THERAPEUTIC EFFECTS. THERE IS EVIDENCE FOR YOGA AS BEING A POTENT ANTIDEPRESSANT THAT MATCHES WITH DRUGS. IN DEPRESSIVE DISORDER, YOGA 'CORRECTS' AN UNDERLYING COGNITIVE PHYSIOLOGY. IN SCHIZOPHRENIA PATIENTS, YOGA HAS BENEFITS AS AN ADD-ON INTERVENTION IN PHARMACOLOGICALLY STABILIZED SUBJECTS. THE EFFECTS ARE PARTICULARLY NOTABLE ON NEGATIVE SYMPTOMS. YOGA ALSO HELPS TO CORRECT SOCIAL COGNITION. YOGA CAN BE INTRODUCED EARLY IN THE TREATMENT OF PSYCHOSIS WITH SOME BENEFITS. ELEVATION OF OXYTOCIN MAY BE A MECHANISM OF YOGA EFFECTS IN SCHIZOPHRENIA. CERTAIN COMPONENTS OF YOGA HAVE DEMONSTRATED NEUROBIOLOGICAL EFFECTS SIMILAR TO THOSE OF VAGAL STIMULATION, INDICATING THIS (INDIRECT OR AUTOGENOUS VAGAL STIMULATION) AS A POSSIBLE MECHANISM OF ITS ACTION. IT IS TIME, PSYCHIATRISTS EXPLOITED THE BENEFITS IF YOGA FOR A COMPREHENSIVE CARE IN THEIR PATIENTS. 2013 12 1496 36 INTRACEREBRAL PAIN PROCESSING IN A YOGA MASTER WHO CLAIMS NOT TO FEEL PAIN DURING MEDITATION. WE RECORDED MAGNETOENCEPHALOGRAPHY (MEG) AND FUNCTIONAL MAGNETIC RESONANCE IMAGING (FMRI) FOLLOWING NOXIOUS LASER STIMULATION IN A YOGA MASTER WHO CLAIMS NOT TO FEEL PAIN WHEN MEDITATING. AS FOR BACKGROUND MEG ACTIVITY, THE POWER OF ALPHA FREQUENCY BANDS PEAKING AT AROUND 10 HZ WAS MUCH INCREASED DURING MEDITATION OVER OCCIPITAL, PARIETAL AND TEMPORAL REGIONS, WHEN COMPARED WITH THE NON-MEDITATIVE STATE, WHICH MIGHT MEAN THE SUBJECT WAS VERY RELAXED, THOUGH HE DID NOT FALL ASLEEP, DURING MEDITATION. PRIMARY PAIN-RELATED CORTICAL ACTIVITIES RECORDED FROM PRIMARY (SI) AND SECONDARY SOMATOSENSORY CORTICES (SII) BY MEG WERE VERY WEAK OR ABSENT DURING MEDITATION. AS FOR FMRI RECORDING, THERE WERE REMARKABLE CHANGES IN LEVELS OF ACTIVITY IN THE THALAMUS, SII-INSULA (MAINLY THE INSULA) AND CINGULATE CORTEX BETWEEN MEDITATION AND NON-MEDITATION. ACTIVITIES IN ALL THREE REGIONS WERE INCREASED DURING NON-MEDITATION, SIMILAR TO RESULTS IN NORMAL SUBJECTS. IN CONTRAST, ACTIVITIES IN ALL THREE REGIONS WERE WEAKER DURING MEDITATION, AND THE LEVEL WAS LOWER THAN THE BASELINE IN THE THALAMUS. RECENT NEUROIMAGING AND ELECTROPHYSIOLOGICAL STUDIES HAVE CLARIFIED THAT THE EMOTIONAL ASPECT OF PAIN PERCEPTION MAINLY INVOLVES THE INSULA AND CINGULATE CORTEX. THOUGH WE CANNOT CLEARLY EXPLAIN THIS UNUSUAL CONDITION IN THE YOGA MASTER, A CHANGE OF MULTIPLE REGIONS RELATING TO PAIN PERCEPTION COULD BE RESPONSIBLE, SINCE PAIN IS A COMPLEX SENSORY AND EMOTIONAL EXPERIENCE. 2005 13 889 17 EFFECT OF YOGA-BASED AND FORCED UNINOSTRIL BREATHING ON THE AUTONOMIC NERVOUS SYSTEM. SOME REPORTS HAVE DESCRIBED THE EFFECTS OF FORCED UNINOSTRIL BREATHING ON AUTONOMIC ACTIVITY AS SEX-SPECIFIC, WHILE OTHER REPORTS DESCRIBED SELECTIVE EFFECTS OF BREATHING THROUGH A SPECIFIC NOSTRIL ON THE TWO DIVISIONS OF THE AUTONOMIC NERVOUS SYSTEM, IRRESPECTIVE OF SEX. THERE ARE ALSO YOGA BREATHING TECHNIQUES WHICH INVOLVE VOLUNTARY UNINOSTRIL BREATHING. THESE TECHNIQUES ALSO INFLUENCED THE AUTONOMIC ACTIVITY BASED ON THE PATENT NOSTRIL RATHER THAN SEX. THESE DESCRIPTIONS WERE IN LINE WITH EXPERIENTIAL OBSERVATIONS OF THE ANCIENT SAGES DESCRIBED IN CLASSICAL YOGA TEXTS. THIS PAPER SUMMARIZES THESE PERSPECTIVES ON UNINOSTRIL BREATHING. 2003 14 1639 17 MODULATION OF IMMUNE RESPONSES IN STRESS BY YOGA. STRESS IS A CONSTANT FACTOR IN TODAY'S FASTPACED LIFE THAT CAN JEOPARDIZE OUR HEALTH IF LEFT UNCHECKED. IT IS ONLY IN THE LAST HALF CENTURY THAT THE ROLE OF STRESS IN EVERY AILMENT FROM THE COMMON COLD TO AIDS HAS BEEN EMPHASIZED, AND THE MECHANISMS INVOLVED IN THIS PROCESS HAVE BEEN STUDIED. STRESS INFLUENCES THE IMMUNE RESPONSE PRESUMABLY THROUGH THE ACTIVATION OF THE HYPOTHALAMIC-PITUITARY ADRENAL AXIS, HYPOTHALAMIC PITUITARY-GONADAL AXIS, AND THE SYMPATHETIC-ADRENAL-MEDULLARY SYSTEM. VARIOUS NEUROTRANSMITTERS, NEUROPEPTIDES, HORMONES, AND CYTOKINES MEDIATE THESE COMPLEX BIDIRECTIONAL INTERACTIONS BETWEEN THE CENTRAL NERVOUS SYSTEM (CNS) AND THE IMMUNE SYSTEM. THE EFFECTS OF STRESS ON THE IMMUNE RESPONSES RESULT IN ALTERATIONS IN THE NUMBER OF IMMUNE CELLS AND CYTOKINE DYSREGULATION. VARIOUS STRESS MANAGEMENT STRATEGIES SUCH AS MEDITATION, YOGA, HYPNOSIS, AND MUSCLE RELAXATION HAVE BEEN SHOWN TO REDUCE THE PSYCHOLOGICAL AND PHYSIOLOGICAL EFFECTS OF STRESS IN CANCERS AND HIV INFECTION. THIS REVIEW AIMS TO DISCUSS THE EFFECT OF STRESS ON THE IMMUNE SYSTEM AND EXAMINE HOW RELAXATION TECHNIQUES SUCH AS YOGA AND MEDITATION COULD REGULATE THE CYTOKINE LEVELS AND HENCE, THE IMMUNE RESPONSES DURING STRESS. 2008 15 2608 13 YOGA FOR PSYCHIATRIC DISORDERS: FROM FAD TO EVIDENCE-BASED INTERVENTION? THERE IS GROWING EVIDENCE FOR YOGA'S NEUROBIOLOGICAL EFFECTS IN PEOPLE WITH PSYCHIATRIC DISORDERS. POSTULATED MECHANISMS OF ACTION INCLUDE: (A) MODULATION OF THE HYPOTHALAMIC-PITUITARY-ADRENAL (HPA) AXIS; (B) ENHANCEMENT OF GABAERGIC NEUROTRANSMISSION; (C) AUTONOMIC MODULATION; AND (D) NEUROENDOCRINOLOGICAL EFFECTS. YOGA AS A THERAPEUTIC INTERVENTION IN PSYCHIATRIC DISORDERS APPEARS PROMISING AND MERITS FURTHER ATTENTION IN CLINICAL PRACTICE AND RESEARCH. 2020 16 1817 13 PROPOSED IDENTIFICATION OF PHYSIOLOGICAL CLASSIFICATION AND THEORETICAL MECHANISMS OF YOGASANAS. YOGA IN THE THEORETICAL AND PRACTICAL FORM IS NOW ACCEPTED ALL OVER THE WORLD, BY THE RESEARCHERS AS WELL AS BY THE GENERAL POPULATION. YOGASANA OR YOGIC POSTURES ARE ONE OF THE MAIN FOUNDATIONS OF PRACTICAL YOGA. MECHANISMS OF MEDIATION AND PRANAYAMA HAS ALREADY BEEN ESTABLISHED. IN THIS ARTICLE, THE AUTHOR IS FOR THE FIRST TIME PROPOSING PHYSIOLOGICAL CLASSIFICATION OF YOGASANA I.E. (A) STRETCH (B) CONTRACTION (C). NEUROMUSCULAR COORDINATION (D) SENSE REDUCTION (E) SPINE BRAIN ACTIVATION. IN SUPPORT OF THIS PHYSIOLOGICAL CLASSIFICATION AUTHOR HAS PROPOSED FIVE HYPOTHETICAL THEORIES I.E. (I) STRETCH RELAXATION AWARENESS (II) CONTRACTION RELAXATION AWARENESS (III) BALLASTIC CONTRACTION RELAXATION AWARENESS (IV) SENSORY MOTOR FUNCTION AWARENESS AND (V) VITAL ENERGY FLOW AWARENESS TO UNDERSTAND THE UNDERLYING MECHANISMS OF YOGASANA PRACTICE AND TO EXPLAIN ITS BENEFITS. 2021 17 1951 15 SCIENCE OF THE MIND: ANCIENT YOGA TEXTS AND MODERN STUDIES. THE PRACTICE OF YOGA IS GAINING IN POPULARITY WITH A WIDE RANGE OF PRACTICES. RECENT RESEARCH AND DESCRIPTIONS FROM THE ANCIENT TEXTS ARE OFTEN CONCURRENT WITH REGARD TO THE EFFECTS OF THE PRACTICE, TAKING INTO ACCOUNT EXPECTED DIFFERENCES BETWEEN MODERN SCIENTIFIC TERMS AND THOSE USED IN THE ORIGINAL TEXTS. VOLUNTARILY REGULATED YOGA BREATHING PRACTICES FORM A BRIDGE BETWEEN PHYSICAL AND MENTAL CHANGES. THE VOLUNTARILY REGULATED YOGA BREATHING HAS DISTINCT EFFECTS ON METABOLISM, THE AUTONOMIC NERVOUS SYSTEM, HIGHER BRAIN FUNCTIONS, AND MENTAL STATE. THE EFFECTS OF MEDITATION ON THE NERVOUS SYSTEM AND MENTAL STATE ARE EVEN CLEARER. 2013 18 1565 33 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 19 436 25 CARDIORESPIRATORY AND METABOLIC CHANGES DURING YOGA SESSIONS: THE EFFECTS OF RESPIRATORY EXERCISES AND MEDITATION PRACTICES. THE NOVELTY OF THIS STUDY WAS TO INVESTIGATE THE CHANGES IN CARDIORESPIRATORY AND METABOLIC INTENSITY BROUGHT ABOUT BY THE PRACTICE OF PRANAYAMAS (BREATHING EXERCISES OF YOGA) AND MEDITATION DURING THE SAME HATHA-YOGA SESSION. THE TECHNIQUE APPLIED WAS THE ONE ADVOCATED BY THE HATHA-YOGA SYSTEM. NINE YOGA INSTRUCTORS-FIVE FEMALES AND FOUR MALES, MEAN AGE OF 44+/-11, 6, WERE SUBJECTED TO ANALYSIS OF THE GASES EXPIRED DURING THREE DISTINCT PERIODS OF 30 MIN: REST, RESPIRATORY EXERCISES AND MEDITATIVE PRACTICE. A METABOLIC OPEN CIRCUIT COMPUTERIZED SYSTEM WAS APPLIED (VO2000, MEDGRAPHICS-USA). THE OXYGEN UPTAKE (VO(2)) AND THE CARBON DIOXIDE OUTPUT (VCO(2)) WERE STATISTICALLY DIFFERENT (P