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Bipul MRS, Rahman MA, Hossain MF. Study on different brain activation rearrangement during cognitive workload from ERD/ERS and coherence analysis. Cogn Neurodyn 2024; 18:1709-1732. [PMID: 39104686 PMCID: PMC11297888 DOI: 10.1007/s11571-023-10032-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 07/11/2023] [Accepted: 11/04/2023] [Indexed: 08/07/2024] Open
Abstract
The functional activities of the brain during any task like imaginary, motor, or cognitive are different in pattern as well as their area of activation in the brain is also different. This variation in pattern is also found in the brain's electrical variations that can be measured from the scalp of the brain using an electroencephalogram (EEG). This work exclusively studied a group of subjects' EEG data (available at: https://archive.physionet.org/physiobank/database/eegmat/) to unravel the activation pattern of the human brain during a mental arithmetic task. Since any cognitive task creates variations in EEG signal pattern, the relative changes in the signal power also occur which is also known as event-related desynchronization/synchronization (ERD/ERS). In this work, ERD/ERS have calculated the band-wise power spectral density (PSD) using Welch's method from the EEG signals. Besides, the coherence analysis was also performed to verify the results of ERD/ERS analysis from several randomly chosen subjects' EEG data. Here, subjects performing mental arithmetic tasks were grouped based on their performances: good (subtraction solved > 10 on average) and bad (subtraction solved ≤ 10 on average) to conduct group-specific ERD/ERS analysis regarding their performance in cognitive tasks. It was found that when the brain is on count condition, the variations found in the band power of theta and beta. The amounts of ERS in the left hemisphere are increased. When the task complexity increases, it contributes to an increase in relative ERD/ERS amounts and durations. The left and right hemispheres were asymmetrically distributed by both the pre-stimulus stages of the corresponding band power and relative ERD/ERS.
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Affiliation(s)
- Md. Rayahan Sarker Bipul
- Department of Biomedical Engineering, Khulna University of Engineering and Technology (KUET), Khulna, 9203 Bangladesh
| | - Md. Asadur Rahman
- Department of Biomedical Engineering, Military Institute of Science and Technology (MIST), Mirpur Cantonment, Dhaka, 1216 Bangladesh
| | - Md. Foisal Hossain
- Department of Electronics and Communication Engineering, Khulna University of Engineering and Technology (KUET), Khulna, 9203 Bangladesh
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2
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Chang PS. Qigong in the care of breast cancer survivors with diabetes. Asia Pac J Oncol Nurs 2024; 11:100501. [PMID: 39081549 PMCID: PMC11287077 DOI: 10.1016/j.apjon.2024.100501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Accepted: 04/27/2024] [Indexed: 08/02/2024] Open
Affiliation(s)
- Pei-Shiun Chang
- Indiana University School of Nursing, Bloomington, IN, United States
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3
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Rusinova A, Volodina M, Ossadtchi A. Short-term meditation training alters brain activity and sympathetic responses at rest, but not during meditation. Sci Rep 2024; 14:11138. [PMID: 38750127 PMCID: PMC11096169 DOI: 10.1038/s41598-024-60932-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 04/29/2024] [Indexed: 05/18/2024] Open
Abstract
Although more people are engaging in meditation practices that require specialized training, few studies address the issues associated with nervous activity pattern changes brought about by such training. For beginners, it remains unclear how much practice is needed before objective physiological changes can be detected, whether or not they are similar across the novices and what are the optimal strategies to track these changes. To clarify these questions we recruited individuals with no prior meditation experience. The experimental group underwent an eight-week Taoist meditation course administered by a professional, while the control group listened to audiobooks. Both groups participated in audio-guided, 34-min long meditation sessions before and after the 8-week long intervention. Their EEG, photoplethysmogram, respiration, and skin conductance were recorded during the mediation and resting state periods. Compared to the control group, the experimental group exhibited band-specific topically organized changes of the resting state brain activity and heart rate variability associated with sympathetic system activation. Importantly, no significant changes were found during the meditation process prior and post the 8-week training in either of the groups. The absence of notable changes in CNS and ANS activity indicators during meditation sessions, for both the experimental and control groups, casts doubt on the effectiveness of wearable biofeedback devices in meditation practice. This finding redirects focus to the importance of monitoring resting state activity to evaluate progress in beginner meditators. Also, 16 h of training is not enough for forming individual objectively different strategies manifested during the meditation sessions. Our results contributed to the development of tools to objectively monitor the progress in novice meditators and the choice of the relevant monitoring strategies. According to our findings, in order to track early changes brought about by the meditation practice it is preferable to monitor brain activity outside the actual meditation sessions.
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Affiliation(s)
- Anna Rusinova
- Center for Bioelectric Interfaces, HSE University, Moscow, Russia, 101000
| | - Maria Volodina
- Center for Bioelectric Interfaces, HSE University, Moscow, Russia, 101000.
- Laboratory of Medical Neurointerfaces and Artificial Intellect, Federal Center of Brain Research and Neurotechnologies of the Federal Medical Biological Agency, Moscow, Russia, 117513.
| | - Alexei Ossadtchi
- Center for Bioelectric Interfaces, HSE University, Moscow, Russia, 101000
- Artificial Intelligence Research Institute, AIRI, Moscow, Russia
- LLC "Life Improvement by Future Technologies Center", Moscow, Russia
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4
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Kim Y, Hwang J, Lee J, Jang S, Im Y, Yoon S, Lee SH. Clinical Implication of Maumgyeol Basic Biotypes-Electroencephalography- and Photoplethysmogram-Based Bwave State Inventory. Psychiatry Investig 2024; 21:528-538. [PMID: 38811002 PMCID: PMC11136575 DOI: 10.30773/pi.2023.0381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 02/07/2024] [Accepted: 02/25/2024] [Indexed: 05/31/2024] Open
Abstract
OBJECTIVE The development of individual subtypes based on biomarkers offers a cost-effective and timely avenue to comprehending individual differences pertaining to mental health, independent from individuals' subjective insights. Incorporating 2-channel electroencephalography (EEG) and photoplethysmogram (PPG), we sought to establish a subtype classification system with clinical relevance. METHODS One hundred healthy participants and 99 patients with psychiatric disorders were recruited. Classification thresholds were determined using the EEG and PPG data from 2,278 individuals without mental disorders, serving to classify subtypes in our sample of 199 participants. Multivariate analysis of variance was applied to examine psychological distinctions among these subtypes. K-means clustering was employed to verify the classification system. RESULTS The distribution of subtypes differed between healthy participants and those with psychiatric disorders. Cognitive abilities were contingent upon brain subtypes, while mind subtypes exhibited significant differences in symptom severity, overall health, and cognitive stress. K-means clustering revealed that the results of our theory-based classification and data-driven classification are comparable. The synergistic assessment of both brain and mind subtypes was also explored. CONCLUSION Our subtype classification system offers a concise means to access individuals' mental health. The utilization of EEG and PPG signals for subtype classification offers potential for the future of digital mental healthcare.
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Affiliation(s)
- Yunsu Kim
- Department of Psychology, Sungkyunkwan University, Seoul, Republic of Korea
- Clinical Emotion and Cognition Research Laboratory, Department of Psychiatry, Inje University, Goyang, Republic of Korea
| | | | | | | | - Yumi Im
- Bwave Inc., Goyang, Republic of Korea
| | - Sunkyung Yoon
- Department of Psychology, Sungkyunkwan University, Seoul, Republic of Korea
| | - Seung-Hwan Lee
- Clinical Emotion and Cognition Research Laboratory, Department of Psychiatry, Inje University, Goyang, Republic of Korea
- Bwave Inc., Goyang, Republic of Korea
- Department of Psychiatry, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Republic of Korea
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5
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Merlet I, Guillery M, Weyl L, Hammal M, Maliia M, Maliia S, Biraben A, Ricordeau C, Drapier D, Nica A. EEG changes induced by meditative practices: State and trait effects in healthy subjects and in patients with epilepsy. Rev Neurol (Paris) 2024; 180:326-347. [PMID: 38503588 DOI: 10.1016/j.neurol.2024.02.387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 02/28/2024] [Accepted: 02/28/2024] [Indexed: 03/21/2024]
Abstract
The effect of meditation on brain activity has been the topic of many studies in healthy subjects and in patients suffering from chronic diseases. These effects are either explored during meditation practice (state effects) or as a longer-term result of meditation training during the resting-state (trait). The topic of this article is to first review these findings by focusing on electroencephalography (EEG) changes in healthy subjects with or without experience in meditation. Modifications in EEG baseline rhythms, functional connectivity and advanced nonlinear parameters are discussed in regard to feasibility in clinical applications. Secondly, we provide a state-of-the-art of studies that proposed meditative practices as a complementary therapy in patients with epilepsy, in whom anxiety and depressive symptoms are prevalent. In these studies, the effects of standardized meditation programs including elements of traditional meditation practices such as mindfulness, loving-kindness and compassion are explored both at the level of psychological functioning and on the occurrence of seizures. Lastly, preliminary results are given regarding our ongoing study, the aim of which is to quantify the effects of a mindfulness self-compassion (MSC) practice on interictal and ictal epileptic activity. Feasibility, difficulties, and prospects of this study are discussed.
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Affiliation(s)
- I Merlet
- Universitiy of Rennes, INSERM, LTSI - UMR 1099, F-35000 Rennes, France.
| | - M Guillery
- Centre Hospitalier Guillaume-Regnier (CHGR), University of Rennes, 35000 Rennes, France.
| | - L Weyl
- Centre Hospitalier Guillaume-Regnier (CHGR), University of Rennes, 35000 Rennes, France.
| | - M Hammal
- Centre Hospitalier Guillaume-Regnier (CHGR), University of Rennes, 35000 Rennes, France.
| | - M Maliia
- Universitiy of Rennes, INSERM, LTSI - UMR 1099, F-35000 Rennes, France; Epilepsy Unit, Reference Center for Rare Epilepsies, Neurology Department, Rennes University Hospital, Rennes, France; Center for Clinical Investigation CIC-P INSERM 1414, F-35000 Rennes, France.
| | - S Maliia
- Centre Hospitalier Guillaume-Regnier (CHGR), University of Rennes, 35000 Rennes, France.
| | - A Biraben
- Universitiy of Rennes, INSERM, LTSI - UMR 1099, F-35000 Rennes, France; Epilepsy Unit, Reference Center for Rare Epilepsies, Neurology Department, Rennes University Hospital, Rennes, France; Center for Clinical Investigation CIC-P INSERM 1414, F-35000 Rennes, France.
| | - C Ricordeau
- Epilepsy Resource Team, 54, rue Saint-Helier, 35000 Rennes, France.
| | - D Drapier
- Centre Hospitalier Guillaume-Regnier (CHGR), University of Rennes, 35000 Rennes, France.
| | - A Nica
- Universitiy of Rennes, INSERM, LTSI - UMR 1099, F-35000 Rennes, France; Epilepsy Unit, Reference Center for Rare Epilepsies, Neurology Department, Rennes University Hospital, Rennes, France; Center for Clinical Investigation CIC-P INSERM 1414, F-35000 Rennes, France.
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Perez-Diaz O, Góngora D, González-Mora JL, Rubia K, Barrós-Loscertales A, Hernández SE. Enhanced amygdala-anterior cingulate white matter structural connectivity in Sahaja Yoga Meditators. PLoS One 2024; 19:e0301283. [PMID: 38547155 PMCID: PMC10977753 DOI: 10.1371/journal.pone.0301283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 03/11/2024] [Indexed: 04/02/2024] Open
Abstract
OBJECTIVE To study the white matter connections between anterior cingulate cortex, anterior insula and amygdala as key regions of the frontal-limbic network that have been related to meditation. DESIGN Twenty experienced practitioners of Sahaja Yoga Meditation and twenty nonmeditators matched on age, gender and education level, were scanned using Diffusion Weighted Imaging, using a 3T scanner, and their white matter connectivity was compared using diffusion tensor imaging analyses. RESULTS There were five white matter fiber paths in which meditators showed a larger number of tracts, two of them connecting the same area in both hemispheres: the left and right amygdalae and the left and right anterior insula; and the other three connecting left anterior cingulate with the right anterior insula, the right amygdala and the left amygdala. On the other hand, non-meditators showed larger number of tracts in two paths connecting the left anterior insula with the left amygdala, and the left anterior insula with the left anterior cingulate. CONCLUSIONS The study shows that long-term practice of Sahaja Yoga Meditation is associated with larger white matter tracts strengthening interhemispheric connections between limbic regions and connections between cingulo-amygdalar and cingulo-insular brain regions related to top-down attentional and emotional processes as well as between top-down control functions that could potentially be related to the witness state perceived through the state of mental silence promoted with this meditation. On the other hand, reduced connectivity strength in left anterior insula in the meditation group could be associated to reduced emotional processing affecting top-down processes.
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Affiliation(s)
- Oscar Perez-Diaz
- Instituto Universitario de Neurociencia, Universidad de La Laguna, San Cristóbal de La Laguna, Tenerife, Spain
| | - Daylín Góngora
- Department of Microeconomics and Public Economics, Maastricht University School of Business and Economics & Maastricht University - Center of Neuroeconomics, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - José L González-Mora
- Instituto Universitario de Neurociencia, Universidad de La Laguna, San Cristóbal de La Laguna, Tenerife, Spain
| | - Katya Rubia
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom
| | - Alfonso Barrós-Loscertales
- Departamento de Psicología Básica, Clínica y Psicobiología, Universitat Jaume I, Castellón de la Plana, Castellón, Spain
| | - Sergio Elías Hernández
- Instituto Universitario de Neurociencia, Universidad de La Laguna, San Cristóbal de La Laguna, Tenerife, Spain
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Borghesi F, Cremascoli R, Chirico A, Bianchi L, Di Moia A, Priano L, Piedimonte A, Mauro A, Cipresso P. Mind and body connection in expert meditators: a computational study based on central and peripheral nervous system. BMC Complement Med Ther 2024; 24:117. [PMID: 38454382 PMCID: PMC10921575 DOI: 10.1186/s12906-024-04413-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 02/27/2024] [Indexed: 03/09/2024] Open
Abstract
A meditative 'technique' is conceived as a continuum of different affective states involving mind and body jointly. Meditative practices can involve cognitive effort (e.g., focused attention and open-minded techniques), as well as automatic and implicit practices (e.g., transcendental techniques). The NGALSO tantric self-healing meditation technique is a brief, comprehensive meditation technique relying on mind and body connection. In this study, we aimed to investigate the state and the trait neurophysiological correlates of NGALSO meditation practice. First, 19 EEG channels and a 3-lead ECG signal were recorded from 10 expert meditators (more than 7 years of daily meditation) and 10 healthy inexpert participants (controls) who underwent the same meditative procedure. The neuropsychological profiles of experts and controls were compared. Results showed that expert meditators had significantly higher power spectra on alpha, theta and beta, and a higher sympathetic tone with lower parasympathetic tone after meditation. Conversely, the control group had significantly less power spectra on alpha, theta and beta, and a higher parasympathetic tone with lower sympathetic tone after meditation. A machine learning approach also allowed us to classify experts vs. controls correctly by using only EEG Theta bands before or after meditation. ECG results allowed us to show a significantly higher effort by expert meditators vs. controls, thus suggesting that a higher effort is required for this meditation, in line with the principle 'no pain, no gain' in body and mind.
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Affiliation(s)
| | - Riccardo Cremascoli
- Istituto Auxologico Italiano, IRCCS, Unit of Neurology and Neurorehabilitation, San Giuseppe Hospital Piancavallo, Verbania, Italy
| | - Alice Chirico
- Research Center in Communication Psychology, Universitá Cattolica del Sacro Cuore, Milan, Italy
| | - Laura Bianchi
- Istituto Auxologico Italiano, IRCCS, Unit of Neurology and Neurorehabilitation, San Giuseppe Hospital Piancavallo, Verbania, Italy
| | - Amalia Di Moia
- Istituto Auxologico Italiano, IRCCS, Unit of Neurology and Neurorehabilitation, San Giuseppe Hospital Piancavallo, Verbania, Italy
| | - Lorenzo Priano
- Istituto Auxologico Italiano, IRCCS, Unit of Neurology and Neurorehabilitation, San Giuseppe Hospital Piancavallo, Verbania, Italy
- Department of Neurosciences Rita Levi Montalcini, University of Turin, Turin, Italy
| | | | - Alessandro Mauro
- Istituto Auxologico Italiano, IRCCS, Unit of Neurology and Neurorehabilitation, San Giuseppe Hospital Piancavallo, Verbania, Italy
- Department of Neurosciences Rita Levi Montalcini, University of Turin, Turin, Italy
| | - Pietro Cipresso
- Department of Psychology, University of Turin, Turin, Italy
- Istituto Auxologico Italiano, IRCCS, Unit of Neurology and Neurorehabilitation, San Giuseppe Hospital Piancavallo, Verbania, Italy
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8
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Chang PS, Cohee A, Poe C, Kim J, Yergler A, Lu Y. A Content Analysis of African Americans' Experience of Engaging in Qigong Exercise Intervention in a Community Setting. JOURNAL OF INTEGRATIVE AND COMPLEMENTARY MEDICINE 2024; 30:146-156. [PMID: 37585619 PMCID: PMC10886424 DOI: 10.1089/jicm.2023.0130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
Introduction: Although an increasing number of African Americans 50 years of age and older practice qigong, a mind-body exercise, to manage their health conditions, little is known about their perceptions and experiences of engaging in and learning qigong exercise. This study aimed to explore the subjective perceptions of the health benefits, engagement, adherence, and learning of qigong exercise in African Americans 45-85 years of age as a foundation for promoting this approach for African Americans' physical and psychological health. Methods: Fifteen African Americans were enrolled in a 1-h qigong exercise program twice a week for 8 weeks (a total of 16 sessions) in the activity center of a local church. Participants were interviewed after the intervention to explore their perceptions of learning and practicing qigong exercise. Interviews were conducted in person, audio recorded, transcribed verbatim, and analyzed using content analysis. Results: Five themes emerged: (1) Perceived benefits of practicing qigong, (2) helpful strategies for qigong learning, (3) facilitators for home qigong practice, (4) motivators for qigong exercise adherence, and (5) recommending qigong to others. qigong exercise was perceived to be effective for balance, flexibility, muscle strength, sleep quality, emotion regulation, and stress management. Nearly 75% of participants reported home qigong practice at least twice a week. Conclusions: Middle-age and older African Americans' responses provide insights on health benefits associated with practicing qigong exercise, adherence, home practice, and learning, which may serve as the first step to promoting the use of qigong exercise in this population and may be adopted to similar exercise interventions with minority older adults in the future.
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Affiliation(s)
- Pei-Shiun Chang
- Department of Community and Health Policy, School of Nursing, Indiana University Bloomington, Bloomington, IN, USA
| | | | - Christina Poe
- Department of Community and Health Policy, School of Nursing, Indiana University Bloomington, Bloomington, IN, USA
| | - Junhyoung Kim
- Department of Health & Wellness Design, School of Public Health, Indiana University Bloomington, Bloomington, IN, USA
| | - Abby Yergler
- Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
| | - Yvonne Lu
- Department of Nursing Science, School of Nursing, Indiana University, Indianapolis, IN, USA
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Fu X, Tamozhnikov SS, Saprygin AE, Istomina NA, Klemeshova DI, Savostyanov AN. Convolutional neural networks for classifying healthy individuals practicing or not practicing meditation according to the EEG data. Vavilovskii Zhurnal Genet Selektsii 2023; 27:851-858. [PMID: 38213699 PMCID: PMC10777293 DOI: 10.18699/vjgb-23-98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/10/2023] [Accepted: 09/13/2023] [Indexed: 01/13/2024] Open
Abstract
The development of objective methods for assessing stress levels is an important task of applied neuroscience. Analysis of EEG recorded as part of a behavioral self-control program can serve as the basis for the development of test methods that allow classifying people by stress level. It is well known that participation in meditation practices leads to the development of skills of voluntary self-control over the individual's mental state due to an increased concentration of attention to themselves. As a consequence of meditation practices, participants can reduce overall anxiety and stress levels. The aim of our study was to develop, train and test a convolutional neural network capable of classifying individuals into groups of practitioners and non-practitioners of meditation by analysis of eventrelated brain potentials recorded during stop-signal paradigm. Four non-deep convolutional network architectures were developed, trained and tested on samples of 100 people (51 meditators and 49 non-meditators). Subsequently, all structures were additionally tested on an independent sample of 25 people. It was found that a structure using a one-dimensional convolutional layer combining the layer and a two-layer fully connected network showed the best performance in simulation tests. However, this model was often subject to overfitting due to the limitation of the display size of the data set. The phenomenon of overfitting was mitigated by changing the structure and scale of the model, initialization network parameters, regularization, random deactivation (dropout) and hyperparameters of cross-validation screening. The resulting model showed 82 % accuracy in classifying people into subgroups. The use of such models can be expected to be effective in assessing stress levels and inclination to anxiety and depression disorders in other groups of subjects.
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Affiliation(s)
- X Fu
- Novosibirsk State University, Novosibirsk, Russia
| | - S S Tamozhnikov
- Scientific Research Institute of Neurosciences and Medicine, Novosibirsk, Russia
| | - A E Saprygin
- Scientific Research Institute of Neurosciences and Medicine, Novosibirsk, Russia Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - N A Istomina
- Novosibirsk State University, Novosibirsk, Russia
| | - D I Klemeshova
- Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - A N Savostyanov
- Novosibirsk State University, Novosibirsk, Russia Scientific Research Institute of Neurosciences and Medicine, Novosibirsk, Russia Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
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10
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Ng HYH, Wu CW, Huang FY, Huang CM, Hsu CF, Chao YP, Jung TP, Chuang CH. Enhanced electroencephalography effective connectivity in frontal low-gamma band correlates of emotional regulation after mindfulness training. J Neurosci Res 2023; 101:901-915. [PMID: 36717762 DOI: 10.1002/jnr.25168] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 12/08/2022] [Accepted: 01/06/2023] [Indexed: 02/01/2023]
Abstract
Practicing mindfulness, focusing attention on the internal and external experiences occurring in the present moment with open and nonjudgement stance, can lead to the development of emotional regulation skills. Yet, the effective connectivity of brain regions during mindfulness has been largely unexplored. Studies have shown that mindfulness practice promotes functional connectivity in practitioners, potentially due to improved emotional regulation abilities and increased connectivity in the lateral prefrontal areas. To examine the changes in effective connectivity due to mindfulness training, we analyzed electroencephalogram (EEG) signals taken before and after mindfulness training, focusing on training-related effective connectivity changes in the frontal area. The mindfulness training group participated in an 8-week mindfulness-based stress reduction (MBSR) program. The control group did not take part. Regardless of the specific mindfulness practice used, low-gamma band effective connectivity increased globally after the mindfulness training. High-beta band effective connectivity increased globally only during Breathing. Moreover, relatively higher outgoing effective connectivity strength was seen during Resting and Breathing and Body-scan. By analyzing the changes in outgoing and incoming connectivity edges, both F7 and F8 exhibited strong parietal connectivity during Resting and Breathing. Multiple regression analysis revealed that the changes in effective connectivity of the right lateral prefrontal area predicted mindfulness and emotional regulation abilities. These results partially support the theory that the lateral prefrontal areas have top-down modulatory control, as these areas have high outflow effective connectivity, implying that mindfulness training cultivates better emotional regulation.
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Affiliation(s)
- Hei-Yin Hydra Ng
- Research Center for Education and Mind Sciences, College of Education, National Tsing Hua University, Hsinchu, Taiwan.,Department of Educational Psychology and Counseling, College of Education, National Tsing Hua University, Hsinchu, Taiwan
| | - Changwei W Wu
- Graduate Institute of Mind, Brain and Consciousness, Taipei Medical University, Taipei, Taiwan.,Brain and Consciousness Research Center, Taipei Medical University-Shuang Ho Hospital, New Taipei, Taiwan
| | - Feng-Ying Huang
- Department of Education, National Taipei University of Education, Taipei, Taiwan
| | - Chih-Mao Huang
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu, Taiwan.,Center for Intelligent Drug Systems and Smart Bio-devices (IDS2B), National Yang Ming Chiao Tung University, Hsinchu, Taiwan
| | - Chia-Fen Hsu
- Graduate Institute of Behavioral Sciences, Chang Gung University, Taoyuan, Taiwan.,Department of Child Psychiatry, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Yi-Ping Chao
- Department of Computer Science and Information Engineering, Chang Gung University, Taoyuan, Taiwan.,Department of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Tzyy-Ping Jung
- Institute for Neural Computation and Institute of Engineering in Medicine, University of California, San Diego, California, La Jolla, USA
| | - Chun-Hsiang Chuang
- Research Center for Education and Mind Sciences, College of Education, National Tsing Hua University, Hsinchu, Taiwan.,Institute of Information Systems and Applications, College of Electrical Engineering and Computer Science, National Tsing Hua University, Hsinchu, Taiwan
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11
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Martins JE, Simões J, Barros M, Simões M. Pre-Molecular Assessment of Self-Processes in Neurotypical Subjects Using a Single Cognitive Behavioral Intervention Evoking Autobiographical Memory. Behav Sci (Basel) 2022; 12:381. [PMID: 36285950 PMCID: PMC9598325 DOI: 10.3390/bs12100381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 09/18/2022] [Accepted: 09/22/2022] [Indexed: 11/21/2022] Open
Abstract
In the last 20 years, several contributions have been published on what concerns the conceptual and empirical connections between self-processes. However, only a limited number of publications addressed the viability of those processes to characterize mental health in neurotypical subjects with a normative pattern of neurodevelopment. Furthermore, even fewer experiments focused explicitly on the complexity of studying neurotypical phenomenal data. On the one hand, this normative pattern is commonly associated with mental health and a multifaceted self-concept and well-being. On the other hand, well-being is often related to a healthy cognitive life. However, how such intricate and complex relation between self-processes is established in neurotypical subjects requires further evidence. The novelty of this work is thus studying the first-person experience, which is correlated with the mental events aroused by a cognitive behavioral intervention. The prior methodology that led to the complete characterization of a neurotypical sample was already published by the authors, although the materials, the methods, the sample screening, and the sample size study required further explanation and exploration. This paper's innovation is hence the phenomenological assessment of subjects' self-regulation, which is used for mental health profiling, providing the basis for subsequent molecular typing. For that matter, a convenience sample of 128 (19-25-year-old) neurotypical young adults, healthy university students at the University of Lisbon, non-medicated and with no serious, uncontrolled, or chronic diseases, are characterized according to their cognitive functioning and self-concept. The procedure comprised (i) a mental status examination (psychological assessment) and (ii) a psychological intervention, i.e., a single cognitive behavioral intervention (intervention protocol). The psychological assessment was a standardized and structured clinical interview, which comprised the use of 4 psychological scales complementary to the classical Mental Status Examination (MSE). The intervention protocol applied a combined exercise of psychophysical training and autobiographical-self memory-recalling. The results permitted identifying and isolating four different subgroups (self awareness, self consciousness, reflective self, and pre-reflective self) in neurotypical subjects with discrete self-processes. The outcome of this study is screening four different aspects of self-reflection and the isolation between various forms of self-directed attention and their interconnections in these four mental health strata. The practical implication of this study is to fulfill an a priori pre-molecular assessment of self-regulation with separate cognitive characteristics. The reliability of these mental strata, their distinct neurophysiology, and discrete molecular fingerprint will be tested in a future publication by in silico characterization, total protein profiling, and simultaneous immunodetection of the neuropeptide and neuroimmune response of the same participants.
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Affiliation(s)
- Jorge Emanuel Martins
- Laboratory of Mind-Matter Interaction with Therapeutic Intention (LIMMIT), Faculty of Medicine, University of Lisbon, 1649-028 Lisbon, Portugal
- Center for Interdisciplinary Research in Health (CIIS), Faculty of Dental Medicine (FMD), Universidade Católica Portuguesa, 3504-505 Viseu, Portugal
| | - Joana Simões
- Laboratory of Mind-Matter Interaction with Therapeutic Intention (LIMMIT), Faculty of Medicine, University of Lisbon, 1649-028 Lisbon, Portugal
| | - Marlene Barros
- Center for Interdisciplinary Research in Health (CIIS), Faculty of Dental Medicine (FMD), Universidade Católica Portuguesa, 3504-505 Viseu, Portugal
| | - Mário Simões
- Laboratory of Mind-Matter Interaction with Therapeutic Intention (LIMMIT), Faculty of Medicine, University of Lisbon, 1649-028 Lisbon, Portugal
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12
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Magan D, Yadav RK. Psychoneuroimmunology of Meditation. Ann Neurosci 2022; 29:170-176. [DOI: 10.1177/09727531221109117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 03/24/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Meditation is a conscious mental discipline, that has been implicated in the relaxation response. The mechanism behind such a relaxing effect is psychoneuroimmunology (PNI), based on the interaction between mind, physical health, and self-healing; that conceptualizes that stress and an individual’s emotional state led to predisposition to diseases. Research to date suggests that meditation may play an active role in remodeling the imbalance between mind and body by modulating the psychoneuroimmunological effects of stress. However, to date, the multi-dimensional psychoneuroimmune aspects of meditation together have not been completely explicated. An evidence-based mechanism has been framed for the first time in India to explain the psychoneuroimmunology of regular and long-term meditation practice. Summary: Present evidence-based mechanism confirms prefrontal cortex (PFC) acts as a ‘Functional Connectome’ where psycho-neuro-immune aspects of meditation function simultaneously to exert positive benefits in the regulation of cognitive and emotional behavior. Also, this mechanism will help us to understand how human augmentation with lifestyle modification fosters brain plasticity to overcome various neuropsychiatric illnesses. Key Message: Meditation is a scientific tool against neuro-psychiatric illnesses.
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Affiliation(s)
- Dipti Magan
- Department of Physiology, All India Institute of Medical Sciences, Bathinda, Punjab, India
| | - Raj Kumar Yadav
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, Delhi, India
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13
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Lapomarda G, Valer S, Job R, Grecucci A. Built to last: Theta and delta changes in resting-state EEG activity after regulating emotions. Brain Behav 2022; 12:e2597. [PMID: 35560984 PMCID: PMC9226824 DOI: 10.1002/brb3.2597] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 03/05/2022] [Accepted: 03/29/2022] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Over the past years, electroencephalography (EEG) studies focused on task-related activity to characterize cortical responses associated with emotion regulation (ER), without exploring the possibility that regulating emotions can leave a trace in the brain by affecting its oscillatory activity. Demonstrating whether the effect of regulation alters the brain activity after the session and whether this reflects an increased cognitive regulatory ability has great relevance. METHODS To address this issue, 5 min of electrical brain activity at rest were recorded before and after (1) one session in which participants perceived and regulated (through distancing) their emotions (regulation session, ReS), and (2) another session in which they only perceived emotions (attend session, AtS). One hundred and sixty visual stimuli were presented, and subjective ratings of valence and arousal of stimuli were recorded. RESULTS Behavioral results showed the efficacy of the regulation strategy in modulating both arousal and valence. A cluster-based permutation test on EEG data at rest revealed a significant increase in theta and delta activity after the ReS compared to the AtS, suggesting that regulating emotions can alter brain activity after the session. CONCLUSIONS These results allowed us to outline a comprehensive view of the neurophysiological mechanisms associated with ER, as well as some possible implications in psychotherapy.
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Affiliation(s)
- Gaia Lapomarda
- Department of Psychology and Cognitive Sciences, University of Trento, Trento, Italy.,Department of Psychology, Science Division, New York University of Abu Dhabi, Abu Dhabi, UAE
| | - Stefania Valer
- Department of Psychology and Cognitive Sciences, University of Trento, Trento, Italy
| | - Remo Job
- Department of Psychology and Cognitive Sciences, University of Trento, Trento, Italy
| | - Alessandro Grecucci
- Department of Psychology and Cognitive Sciences, University of Trento, Trento, Italy
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14
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Paoletti P, Leshem R, Pellegrino M, Ben-Soussan TD. Tackling the Electro-Topography of the Selves Through the Sphere Model of Consciousness. Front Psychol 2022; 13:836290. [PMID: 35664179 PMCID: PMC9161303 DOI: 10.3389/fpsyg.2022.836290] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 03/11/2022] [Indexed: 11/13/2022] Open
Abstract
In the current hypothesis paper, we propose a novel examination of consciousness and self-awareness through the neuro-phenomenological theoretical model known as the Sphere Model of Consciousness (SMC). Our aim is to create a practical instrument to address several methodological issues in consciousness research. We present a preliminary attempt to validate the SMC via a simplified electrophysiological topographic map of the Self. This map depicts the gradual shift from faster to slower frequency bands that appears to mirror the dynamic between the various SMC states of Self. In order to explore our hypothesis that the SMC's different states of Self correspond to specific frequency bands, we present a mini-review of studies examining the electrophysiological activity that occurs within the different states of Self and in the context of specific meditation types. The theoretical argument presented here is that the SMC's hierarchical organization of three states of the Self mirrors the hierarchical organization of Focused Attention, Open Monitoring, and Non-Dual meditation types. This is followed by testable predictions and potential applications of the SMC and the hypotheses derived from it. To our knowledge, this is the first integrated electrophysiological account that combines types of Self and meditation practices. We suggest this electro-topographic framework of the Selves enables easier, clearer conceptualization of the connections between meditation types as well as increased understanding of wakefulness states and altered states of consciousness.
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Affiliation(s)
- Patrizio Paoletti
- Research Institute for Neuroscience, Education and Didactics, Patrizio Paoletti Foundation, Assisi, Italy
| | - Rotem Leshem
- Department of Criminology, Bar-Ilan University, Ramat Gan, Israel
| | - Michele Pellegrino
- Research Institute for Neuroscience, Education and Didactics, Patrizio Paoletti Foundation, Assisi, Italy
| | - Tal Dotan Ben-Soussan
- Research Institute for Neuroscience, Education and Didactics, Patrizio Paoletti Foundation, Assisi, Italy
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15
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Shin HJ, Kim SH, Cho HY, Lee JH. The Effects of Meditation with Stabilization Exercise in Marine Region on Pain, Tactile Sense, Muscle Characteristics and Strength, Balance, Quality of Life, and Depression in Female Family Caregivers of People with Severe Physical Disabilities: A Randomized Single-Blinded Controlled Pilot Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19106025. [PMID: 35627562 PMCID: PMC9140401 DOI: 10.3390/ijerph19106025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/14/2022] [Accepted: 05/14/2022] [Indexed: 11/16/2022]
Abstract
Female caregivers of people with disabilities are burdened physically and mentally. To improve these symptoms, an intervention that is easy to apply and has fewer side effects, such as natural healing, has been proposed, but the effect of healing using marine resources is unclear until now. The purpose of this study is to investigate the effect of meditation accompanied with stabilization exercise in the marine region on the improvement of pain, tactile sense, muscle characteristics, muscle strength, balance, quality of life, and depression in female caregivers of people with severe physical disabilities. Twenty-four female family caregivers were recruited and were randomly assigned to the marine therapy group (MTG, n = 12) and the control group (CG, n = 12). Both groups performed the same meditation (35 min) and stabilization exercise (25 min) twice a day for 3 nights and 4 days per session (total 8 sessions). The MTG performed these in the marine region, whereas the CG performed the interventions in the urban region. Pain (pain intensity and pain pressure threshold), tactile sense (tactile spatial acuity), muscle characteristics (stiffness, elasticity), muscle strength (hand and pinch grip strength), balance, quality of life, and depression were measured before and after the intervention and 4 weeks after the intervention. Both groups showed significant improvements in pain intensity (resting pain: f(2) = 72.719, p < 0.001; movement pain: f(2) = 24.952, p < 0.001), muscle strength (right pinch grip: f(2) = 15.265, p < 0.001), and depression (f(2) = 13.312, p < 0.001), while tactile spatial acuity (TSA) (upper part: f(2) = 14.460, p < 0.001; lower part: f(2) = 7.672, p = 0.002), dynamic balance (f(2) = 4.196, p = 0.024), and quality of life (overall quality of life & general health: f(2) = 5.443, p = 0.009; physical health: f(2) = 13.991, p < 0.001; psychological: f(2) = 9.946, p < 0.001; environmental: f(2) = 20.004, p < 0.001; total: f(2) = 11.958, p < 0.001) were significantly improved only in MTG. There was no significant change in pain pressure threshold (upper trapezius (UT): f(2) = 0.765, p = 0.473; levator scapula (LS): f(2) = 0.213, p = 0.809; splenius capitis (SC): f(2) = 0.186, p = 0.831) and muscle characteristics (UT stiffness: f(2) = 1.486, p = 0.241; UT elasticity: f(2) = 0.358, p = 0.702; LS stiffness: f(2) = 2.440, p = 0.102; LS elasticity: f(2) = 0.544, p = 0.585) in both groups. In comparison between groups, the MTG showed a significant difference in sensory function compared to the CG (resting pain: f(2) = 10.487, p = 0.005; lower part: f(2) = 5.341, p = 0.034 in TSA). Our findings suggest that meditation combined with stabilization exercise improved pain, muscle strength, and depression of female caregivers. In particular, greater benefits on tactile sense, balance, and quality of life were found in performing these in the marine region compared to the urban region.
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Affiliation(s)
- Ho-Jin Shin
- Department of Health Science, Gachon University Graduate School, Incheon 21936, Korea; (H.-J.S.); (S.-H.K.)
| | - Sung-Hyeon Kim
- Department of Health Science, Gachon University Graduate School, Incheon 21936, Korea; (H.-J.S.); (S.-H.K.)
| | - Hwi-Young Cho
- Department of Health Science, Gachon University Graduate School, Incheon 21936, Korea; (H.-J.S.); (S.-H.K.)
- Department of Physical Therapy, Gachon University, Incheon 21936, Korea
- Correspondence: (H.-Y.C.); (J.-H.L.); Tel.: +82-32-820-4560 (H.-Y.C.); +1-519-685-8500 (J.-H.L.)
| | - Jae-Hon Lee
- Department of Psychiatry, Schulich School of Medicine and Dentistry, Western University, London, ON N6A 5W9, Canada
- Correspondence: (H.-Y.C.); (J.-H.L.); Tel.: +82-32-820-4560 (H.-Y.C.); +1-519-685-8500 (J.-H.L.)
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16
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Effects of Tai Chi Chuan on cortical sources of EEG rhythms in the resting state in elderly individuals: a cross-sectional study. Neuroreport 2022; 33:180-185. [DOI: 10.1097/wnr.0000000000001766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Volodina M, Smetanin N, Lebedev M, Ossadtchi A. Cortical and autonomic responses during staged Taoist meditation: Two distinct meditation strategies. PLoS One 2021; 16:e0260626. [PMID: 34855823 PMCID: PMC8638869 DOI: 10.1371/journal.pone.0260626] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 11/12/2021] [Indexed: 11/28/2022] Open
Abstract
Meditation is a consciousness state associated with specific physiological and neural correlates. Numerous investigations of these correlates reported controversial results which prevented a consistent depiction of the underlying neurophysiological processes. Here we investigated the dynamics of multiple neurophysiological indicators during a staged meditation session. We measured the physiological changes at rest and during the guided Taoist meditation in experienced meditators and naive subjects. We recorded EEG, respiration, galvanic skin response, and photoplethysmography. All subjects followed the same instructions split into 16 stages. In the experienced meditators group we identified two subgroups with different physiological markers dynamics. One subgroup showed several signs of general relaxation evident from the changes in heart rate variability, respiratory rate, and EEG rhythmic activity. The other subgroup exhibited mind concentration patterns primarily noticeable in the EEG recordings while no autonomic responses occurred. The duration and type of previous meditation experience or any baseline indicators we measured did not explain the segregation of the meditators into these two groups. These results suggest that two distinct meditation strategies could be used by experienced meditators, which partly explains the inconsistent results reported in the earlier studies evaluating meditation effects. Our findings are also relevant to the development of the high-end biofeedback systems.
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Affiliation(s)
- Maria Volodina
- Center for Bioelectric Interfaces, HSE University, Moscow, Russia
| | - Nikolai Smetanin
- Center for Bioelectric Interfaces, HSE University, Moscow, Russia
| | - Mikhail Lebedev
- Center for Bioelectric Interfaces, HSE University, Moscow, Russia
| | - Alexei Ossadtchi
- Center for Bioelectric Interfaces, HSE University, Moscow, Russia
- Artificial intelligence Research Institute, Moscow, Russia
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18
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Nourollahimoghadam E, Gorji S, Gorji A, Khaleghi Ghadiri M. Therapeutic role of yoga in neuropsychological disorders. World J Psychiatry 2021; 11:754-773. [PMID: 34733640 PMCID: PMC8546763 DOI: 10.5498/wjp.v11.i10.754] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 06/28/2021] [Accepted: 08/02/2021] [Indexed: 02/06/2023] Open
Abstract
Yoga is considered a widely-used approach for health conservation and can be adopted as a treatment modality for a plethora of medical conditions, including neurological and psychological disorders. Hence, we reviewed relevant articles entailing various neurological and psychological disorders and gathered data on how yoga exerts positive impacts on patients with a diverse range of disorders, including its modulatory effects on brain bioelectrical activities, neurotransmitters, and synaptic plasticity. The role of yoga practice as an element of the treatment of several neuropsychological diseases was evaluated based on these findings.
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Affiliation(s)
| | - Shaghayegh Gorji
- Epilepsy Research Center, Münster University, Münster 48149, Germany
| | - Ali Gorji
- Epilepsy Research Center, Münster University, Münster 48149, Germany
- Department of Neuroscience, Mashhad University of Medical Sciences, Mashhad 9177948564, Iran
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19
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Kumar V, Bhide SR, Arasappa R, Varambally S, Gangadhar BN. ‘Soother of mind’ – meditation in psychiatric disorders: a narrative review. BJPSYCH ADVANCES 2021. [DOI: 10.1192/bja.2021.51] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARYMeditation, a component of ashtanga yoga, is an act of inward contemplation in which the mind fluctuates between a state of attention to a stimulus and complete absorption in it. Some forms of meditation have been found to be useful for people with psychiatric conditions such as anxiety, depression and substance use disorder. Evidence for usefulness of meditation for people with psychotic disorders is mixed, with reported improvements in negative symptoms but the emergence/precipitation of psychotic symptoms. This article narrates the benefits of meditation in psychiatric disorders, understanding meditation from the yoga perspective, biological aspects of meditation and practical tips for the practice of meditation. We also explain possible ways of modifying meditative practices to make them safe and useful for the patient population and useful overall as a society-level intervention.
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20
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Kim H, Seo P, Choi JW, Kim KH. Emotional arousal due to video stimuli reduces local and inter-regional synchronization of oscillatory cortical activities in alpha- and beta-bands. PLoS One 2021; 16:e0255032. [PMID: 34297738 PMCID: PMC8301653 DOI: 10.1371/journal.pone.0255032] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 07/08/2021] [Indexed: 11/18/2022] Open
Abstract
The purpose of current study is to reveal spatiotemporal features of oscillatory EEG activities in response to emotional arousal induced by emotional video stimuli, and to find the characteristics of cortical activities showing significant difference according to arousal levels. The EEGs recorded during watching affective video clips were transformed to cortical current density time-series, and then, cluster-based permutation test was applied to determine the spatiotemporal origins of alpha- and beta-band activities showing significant difference between high and low arousal levels. We found stronger desynchronization of alpha-band activities due to higher arousal in visual areas, which may be due to stronger activation for sensory information processing for the highly arousing video stimuli. In precentral and superior parietal regions, the stronger desynchronization in alpha-and low beta-bands was observed for the high arousal stimuli. This is expected to reflect enhanced mirror neuron system activities, which is involved in understanding the intention of other’s action. Similar changes according to arousal level were found also in inter-regional phase synchronization in alpha- and beta-bands.
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Affiliation(s)
- Hyun Kim
- Department of Biomedical Engineering, College of Health Sciences, Yonsei University, Wonju, Korea
| | - Pukyeong Seo
- Department of Biomedical Engineering, College of Health Sciences, Yonsei University, Wonju, Korea
| | - Jeong Woo Choi
- Department of Biomedical Engineering, College of Health Sciences, Yonsei University, Wonju, Korea
| | - Kyung Hwan Kim
- Department of Biomedical Engineering, College of Health Sciences, Yonsei University, Wonju, Korea
- * E-mail:
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21
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Chang PS, Lu Y, Nguyen CM, Suh Y, Luciani M, Ofner S, Powell S. Effects of Qigong Exercise on Physical and Psychological Health among African Americans. West J Nurs Res 2021; 43:551-562. [PMID: 32942949 PMCID: PMC8159432 DOI: 10.1177/0193945920959067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Interventions are needed to address physical and psychological health in middle-aged and older African Americans (AAs). The purpose of this pilot study was to evaluate the feasibility and potential benefits of an eight-week Qigong exercise on physical ability and function, balance, frailty, depression and anxiety, and spiritual well-being in AAs using a single-group design. Fifteen AAs with a mean age of 64 years received Qigong exercise over 16 semi-weekly, one-hour sessions. The majority were female (93.3%) and college-level educated (53.3%). Repeat chair stands, physical function, and spiritual well-being improved significantly (p < .05) with effect sizes ranging from .45 to .87. Over 52% of participants showed improved depression scores, fast gait speed, and standing balance. Nearly 42% demonstrated some frailty improvement over baseline. No adverse events were reported. Qigong exercise potentially improves the physical ability and function, and spiritual well-being of AAs and needs further testing in a randomized clinical trial.
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Affiliation(s)
- Pei-Shiun Chang
- Indiana University School of Nursing; 1033 E. Third Street, Bloomington, Indiana 47405
| | - Yvonne Lu
- Indiana University School of Nursing; 600 Barnhill Dr, NU W407, Indianapolis, Indiana 46202
| | - Chi Mai Nguyen
- Indiana University School of Nursing; 1033 E. Third Street, Bloomington, Indiana 47405
| | - Youngnok Suh
- Indiana University School of Nursing; 1033 E. Third Street, Bloomington, Indiana 47405
| | - Mary Luciani
- Indiana University School of Nursing; 600 Barnhill Dr, NU W407, Indianapolis, Indiana 46202
| | - Susan Ofner
- Indiana University School of Medicine, Department of Biostatistics; 410 W. 10th Street, HITS 3000, Indianapolis, IN 46202
| | - Savannah Powell
- Indiana University School of Nursing; 1033 E. Third Street, Bloomington, Indiana 47405
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22
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Masood N, Farooq H. Comparing Neural Correlates of Human Emotions across Multiple Stimulus Presentation Paradigms. Brain Sci 2021; 11:696. [PMID: 34070554 PMCID: PMC8229332 DOI: 10.3390/brainsci11060696] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/18/2021] [Accepted: 05/21/2021] [Indexed: 11/17/2022] Open
Abstract
Most electroencephalography (EEG)-based emotion recognition systems rely on a single stimulus to evoke emotions. These systems make use of videos, sounds, and images as stimuli. Few studies have been found for self-induced emotions. The question "if different stimulus presentation paradigms for same emotion, produce any subject and stimulus independent neural correlates" remains unanswered. Furthermore, we found that there are publicly available datasets that are used in a large number of studies targeting EEG-based human emotional state recognition. Since one of the major concerns and contributions of this work is towards classifying emotions while subjects experience different stimulus-presentation paradigms, we need to perform new experiments. This paper presents a novel experimental study that recorded EEG data for three different human emotional states evoked with four different stimuli presentation paradigms. Fear, neutral, and joy have been considered as three emotional states. In this work, features were extracted with common spatial pattern (CSP) from recorded EEG data and classified through linear discriminant analysis (LDA). The considered emotion-evoking paradigms included emotional imagery, pictures, sounds, and audio-video movie clips. Experiments were conducted with twenty-five participants. Classification performance in different paradigms was evaluated, considering different spectral bands. With a few exceptions, all paradigms showed the best emotion recognition for higher frequency spectral ranges. Interestingly, joy emotions were classified more strongly as compared to fear. The average neural patterns for fear vs. joy emotional states are presented with topographical maps based on spatial filters obtained with CSP for averaged band power changes for all four paradigms. With respect to the spectral bands, beta and alpha oscillation responses produced the highest number of significant results for the paradigms under consideration. With respect to brain region, the frontal lobe produced the most significant results irrespective of paradigms and spectral bands. The temporal site also played an effective role in generating statistically significant findings. To the best of our knowledge, no study has been conducted for EEG emotion recognition while considering four different stimuli paradigms. This work provides a good contribution towards designing EEG-based system for human emotion recognition that could work effectively in different real-time scenarios.
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Affiliation(s)
- Naveen Masood
- Electrical Engineering Department, Bahria University, Karachi 75260, Pakistan
| | - Humera Farooq
- Computer Science Department, Bahria University, Karachi 44000, Pakistan;
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23
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Doborjeh Z, Doborjeh M, Crook-Rumsey M, Taylor T, Wang GY, Moreau D, Krägeloh C, Wrapson W, Siegert RJ, Kasabov N, Searchfield G, Sumich A. Interpretability of Spatiotemporal Dynamics of the Brain Processes Followed by Mindfulness Intervention in a Brain-Inspired Spiking Neural Network Architecture. SENSORS (BASEL, SWITZERLAND) 2020; 20:E7354. [PMID: 33371459 PMCID: PMC7767448 DOI: 10.3390/s20247354] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/16/2020] [Accepted: 12/17/2020] [Indexed: 01/05/2023]
Abstract
Mindfulness training is associated with improvements in psychological wellbeing and cognition, yet the specific underlying neurophysiological mechanisms underpinning these changes are uncertain. This study uses a novel brain-inspired artificial neural network to investigate the effect of mindfulness training on electroencephalographic function. Participants completed a 4-tone auditory oddball task (that included targets and physically similar distractors) at three assessment time points. In Group A (n = 10), these tasks were given immediately prior to 6-week mindfulness training, immediately after training and at a 3-week follow-up; in Group B (n = 10), these were during an intervention waitlist period (3 weeks prior to training), pre-mindfulness training and post-mindfulness training. Using a spiking neural network (SNN) model, we evaluated concurrent neural patterns generated across space and time from features of electroencephalographic data capturing the neural dynamics associated with the event-related potential (ERP). This technique capitalises on the temporal dynamics of the shifts in polarity throughout the ERP and spatially across electrodes. Findings support anteriorisation of connection weights in response to distractors relative to target stimuli. Right frontal connection weights to distractors were associated with trait mindfulness (positively) and depression (inversely). Moreover, mindfulness training was associated with an increase in connection weights to targets (bilateral frontal, left frontocentral, and temporal regions only) and distractors. SNN models were superior to other machine learning methods in the classification of brain states as a function of mindfulness training. Findings suggest SNN models can provide useful information that differentiates brain states based on distinct task demands and stimuli, as well as changes in brain states as a function of psychological intervention.
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Affiliation(s)
- Zohreh Doborjeh
- Faculty of Medical and Health Sciences, School of Population Health, Section of Audiology, The University of Auckland, Auckland 1142, New Zealand;
- Eisdell Moore Centre, The University of Auckland, Auckland 1142, New Zealand
- Centre for Brain Research, The University of Auckland, Auckland 1142, New Zealand;
| | - Maryam Doborjeh
- Information Technology and Software Engineering Department, Auckland University of Technology, Auckland 1010, New Zealand;
| | - Mark Crook-Rumsey
- School of Psychology, Nottingham Trent University, Nottingham NG25 0QF, UK; (M.C.-R.); (A.S.)
| | - Tamasin Taylor
- Faculty of Medical and Health Sciences, The University of Auckland, Auckland 1142, New Zealand;
| | - Grace Y. Wang
- Department of Psychology and Neuroscience, Auckland University of Technology, Auckland 0627, New Zealand; (G.Y.W.); (C.K.); (R.J.S.)
| | - David Moreau
- Centre for Brain Research, The University of Auckland, Auckland 1142, New Zealand;
- School of Psychology, The University of Auckland, Auckland 1142, New Zealand
| | - Christian Krägeloh
- Department of Psychology and Neuroscience, Auckland University of Technology, Auckland 0627, New Zealand; (G.Y.W.); (C.K.); (R.J.S.)
| | - Wendy Wrapson
- School of Public Health and Interdisciplinary Studies, Auckland University of Technology, Auckland 0627, New Zealand;
| | - Richard J. Siegert
- Department of Psychology and Neuroscience, Auckland University of Technology, Auckland 0627, New Zealand; (G.Y.W.); (C.K.); (R.J.S.)
| | - Nikola Kasabov
- Intelligent Systems Research Centre, Ulster University, Londonderry BT48 7JL, UK
- School of Engineering, Computing and Mathematical Sciences, Auckland University of Technology, Auckland 1010, New Zealand
| | - Grant Searchfield
- Faculty of Medical and Health Sciences, School of Population Health, Section of Audiology, The University of Auckland, Auckland 1142, New Zealand;
- Eisdell Moore Centre, The University of Auckland, Auckland 1142, New Zealand
- Centre for Brain Research, The University of Auckland, Auckland 1142, New Zealand;
| | - Alexander Sumich
- School of Psychology, Nottingham Trent University, Nottingham NG25 0QF, UK; (M.C.-R.); (A.S.)
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24
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Deolindo CS, Ribeiro MW, Aratanha MA, Afonso RF, Irrmischer M, Kozasa EH. A Critical Analysis on Characterizing the Meditation Experience Through the Electroencephalogram. Front Syst Neurosci 2020; 14:53. [PMID: 32848645 PMCID: PMC7427581 DOI: 10.3389/fnsys.2020.00053] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 07/06/2020] [Indexed: 11/13/2022] Open
Abstract
Meditation practices, originated from ancient traditions, have increasingly received attention due to their potential benefits to mental and physical health. The scientific community invests efforts into scrutinizing and quantifying the effects of these practices, especially on the brain. There are methodological challenges in describing the neural correlates of the subjective experience of meditation. We noticed, however, that technical considerations on signal processing also don't follow standardized approaches, which may hinder generalizations. Therefore, in this article, we discuss the usage of the electroencephalogram (EEG) as a tool to study meditation experiences in healthy individuals. We describe the main EEG signal processing techniques and how they have been translated to the meditation field until April 2020. Moreover, we examine in detail the limitations/assumptions of these techniques and highlight some good practices, further discussing how technical specifications may impact the interpretation of the outcomes. By shedding light on technical features, this article contributes to more rigorous approaches to evaluate the construct of meditation.
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Affiliation(s)
| | | | | | | | - Mona Irrmischer
- Department of Integrative Neurogenomics and Cognitive Research (CNCR), Amsterdam Neuroscience, VU Amsterdam, Amsterdam, Netherlands
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25
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Solomonova E, Dubé S, Blanchette-Carrière C, Sandra DA, Samson-Richer A, Carr M, Paquette T, Nielsen T. Different Patterns of Sleep-Dependent Procedural Memory Consolidation in Vipassana Meditation Practitioners and Non-meditating Controls. Front Psychol 2020; 10:3014. [PMID: 32038390 PMCID: PMC6989470 DOI: 10.3389/fpsyg.2019.03014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 12/19/2019] [Indexed: 01/01/2023] Open
Abstract
Aim Rapid eye movement (REM) sleep, non-rapid eye movement (NREM) sleep, and sleep spindles are all implicated in the consolidation of procedural memories. Relative contributions of sleep stages and sleep spindles were previously shown to depend on individual differences in task processing. However, no studies to our knowledge have focused on individual differences in experience with Vipassana meditation as related to sleep. Vipassana meditation is a form of mental training that enhances proprioceptive and somatic awareness and alters attentional style. The goal of this study was to examine a potential role for Vipassana meditation experience in sleep-dependent procedural memory consolidation. Methods Groups of Vipassana meditation practitioners (N = 22) and matched meditation-naïve controls (N = 20) slept for a daytime nap in the laboratory. Before and after the nap they completed a procedural task on the Wii Fit balance platform. Results Meditators performed slightly better on the task before the nap, but the two groups improved similarly after sleep. The groups showed different patterns of sleep-dependent procedural memory consolidation: in meditators, task learning was positively correlated with density of slow occipital spindles, while in controls task improvement was positively associated with time in REM sleep. Sleep efficiency and sleep architecture did not differ between groups. Meditation practitioners, however, had a lower density of occipital slow sleep spindles than controls. Conclusion Results suggest that neuroplastic changes associated with meditation practice may alter overall sleep microarchitecture and reorganize sleep-dependent patterns of memory consolidation. The lower density of occipital spindles in meditators may mean that meditation practice compensates for some of the memory functions of sleep.
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Affiliation(s)
- Elizaveta Solomonova
- Dream and Nightmare Laboratory, Centre for Advanced Research in Sleep Medicine, CIUSSS NÎM - HSCM, Montréal, QC, Canada.,Department of Psychiatry, Université de Montréal, Montréal, QC, Canada.,Culture, Mind and Brain Research Group, Department of Psychiatry, McGill University, Montréal, QC, Canada
| | - Simon Dubé
- Dream and Nightmare Laboratory, Centre for Advanced Research in Sleep Medicine, CIUSSS NÎM - HSCM, Montréal, QC, Canada.,Department of Psychology, Concordia University, Montréal, QC, Canada
| | - Cloé Blanchette-Carrière
- Dream and Nightmare Laboratory, Centre for Advanced Research in Sleep Medicine, CIUSSS NÎM - HSCM, Montréal, QC, Canada
| | - Dasha A Sandra
- Integrated Program in Neuroscience, McGill University, Montréal, QC, Canada
| | - Arnaud Samson-Richer
- Dream and Nightmare Laboratory, Centre for Advanced Research in Sleep Medicine, CIUSSS NÎM - HSCM, Montréal, QC, Canada
| | - Michelle Carr
- Dream and Nightmare Laboratory, Centre for Advanced Research in Sleep Medicine, CIUSSS NÎM - HSCM, Montréal, QC, Canada.,Sleep Laboratory, Swansea University, Swansea, United Kingdom
| | - Tyna Paquette
- Dream and Nightmare Laboratory, Centre for Advanced Research in Sleep Medicine, CIUSSS NÎM - HSCM, Montréal, QC, Canada
| | - Tore Nielsen
- Dream and Nightmare Laboratory, Centre for Advanced Research in Sleep Medicine, CIUSSS NÎM - HSCM, Montréal, QC, Canada.,Department of Psychiatry, Université de Montréal, Montréal, QC, Canada
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26
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Savostyanov A, Tamozhnikov S, Bocharov A, Saprygin A, Matushkin Y, Lashin S, Kolpakova G, Sudobin K, Knyazev G. The Effect of Meditation on Comprehension of Statements About One-Self and Others: A Pilot ERP and Behavioral Study. Front Hum Neurosci 2020; 13:437. [PMID: 31998096 PMCID: PMC6962228 DOI: 10.3389/fnhum.2019.00437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 11/28/2019] [Indexed: 11/23/2022] Open
Abstract
The main goal of this study was to examine the effect of long-term meditation practice on behavioral indicators and ERP peak characteristics during an error-recognition task, where participants were presented with emotionally negative (evoking anxiety or aggression) written sentences describing self-related or non-self-related emotional state and personality traits. In total, 200 sentences written in Russian with varying emotional coloring were presented during the task, with half of the sentences containing a grammatical error that the participants were asked to identify. The EEG was recorded in age-matched control individuals (n = 17) and two groups of Samatha meditators with relatively short- (3–5 years’ experience, n = 18) and long-term (10–30 years’ experience, n = 18) practice experience. Task performance time (TPT) and accuracy of error detection (AED) were chosen as behavioral values. Amplitude, time latency and cortical distribution of P300 and P600 peaks of ERP were used as a value of speech-related brain activity. All statistical effects of meditation were estimated, controlling for age and sex. No behavioral differences between two groups of meditators were found. General TPT was shorter for both groups of meditators compared to the control group. Non-meditators reacted significantly slower to sentences about aggression than to sentences about anxiety or non-emotional sentences, whereas no significance was found between meditator groups. Non-meditators had better AED for the sentences about one-self than for the sentences about other people, whereas the meditators did not show any significant difference. The amplitude of P300 peak in frontal and left temporal scalp regions was higher for long-term meditators in comparison with both intermediate and control groups. The latency of P300 and P600 in left frontal and temporal regions positively correlated with TPT, whereas the amplitude of P300 in these regions had a negative correlation with TPT. We demonstrate that long-term meditation practice increases the ability of an individual to process negative emotional stimuli. The differences in behavioral reactions after onset of negative information that was self-related and non-self-related, which is typical for non-meditators, disappeared due to the influence of meditation. ERP results could be interpreted as a value of increase in voluntary control over emotional state during meditational practice.
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Affiliation(s)
- Alexander Savostyanov
- Laboratory of Psychological Genetics, Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences (SB RAS), Novosibirsk, Russia.,Laboratory Differential Psychophysiology, State-Research Institute of Physiology and Basic Medicine, Novosibirsk, Russia.,Laboratory of Biological Markers of Human Social Behavior, Humanitarian Institution at the Novosibirsk State University, Novosibirsk, Russia
| | - Sergey Tamozhnikov
- Laboratory Differential Psychophysiology, State-Research Institute of Physiology and Basic Medicine, Novosibirsk, Russia
| | - Andrey Bocharov
- Laboratory Differential Psychophysiology, State-Research Institute of Physiology and Basic Medicine, Novosibirsk, Russia.,Laboratory of Biological Markers of Human Social Behavior, Humanitarian Institution at the Novosibirsk State University, Novosibirsk, Russia
| | - Alexander Saprygin
- Laboratory Differential Psychophysiology, State-Research Institute of Physiology and Basic Medicine, Novosibirsk, Russia
| | - Yuriy Matushkin
- Laboratory of Psychological Genetics, Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences (SB RAS), Novosibirsk, Russia
| | - Sergey Lashin
- Laboratory of Psychological Genetics, Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences (SB RAS), Novosibirsk, Russia.,Laboratory of Biological Markers of Human Social Behavior, Humanitarian Institution at the Novosibirsk State University, Novosibirsk, Russia
| | - Galina Kolpakova
- Laboratory of Biological Markers of Human Social Behavior, Humanitarian Institution at the Novosibirsk State University, Novosibirsk, Russia
| | - Klimenty Sudobin
- Laboratory of Biological Markers of Human Social Behavior, Humanitarian Institution at the Novosibirsk State University, Novosibirsk, Russia
| | - Gennady Knyazev
- Laboratory Differential Psychophysiology, State-Research Institute of Physiology and Basic Medicine, Novosibirsk, Russia
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27
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Zargar F, Haghshenas N, Rajabi F, Tarrahi MJ. Effectiveness of Dialectical Behavioral Therapy on Executive Function, Emotional Control and Severity of Symptoms in Patients with Bipolar I Disorder. Adv Biomed Res 2019; 8:59. [PMID: 31673532 PMCID: PMC6796294 DOI: 10.4103/abr.abr_42_19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Background: Bipolar disorder is a disabling illness characterized by recurrent episodes of mania, hypomania, and depression. The dialectical behaviour therapy (DBT) is basically designed to help regulate excitement, tolerance of discomfort, mindfulness and interpersonal relationships. This study aimed to determine the effectiveness of DBT on executive function, emotional control and symptom relief in patients with type 1 bipolar disorder. Materials and Methods: This clinical trial was conducted on 50 patients with type 1 bipolar disorder. These patients were divided into two 25 populated groups of controls and intervention. The control group did not receive any other alternative therapy apart from routine medications, but in the intervention group, in addition to routine medications, DBT treatment was also done as complementary therapy in 12 sessions based on Dick's protocol. Then, Mania severity, emotional control and their executive functions were evaluated before and after the intervention and compared in two groups. Results: After the intervention, the scores of mania and depression mood with the mean of 2.12 ± 3.09 and 31.08 ± 8.98 respectively in intervention group were significantly lower than control group with the mean of 4.24 ± 4.11 and 39.92 ± 9.05 respectively (P < 0.05). Depression and executive function of the patients had no significant difference between the two groups in the post-intervention period and had a modest and non-significant change. Conclusion: DBT has been effective in decreasing the intensity of mania, but, it cannot be used to reduce the emotional instability and impulsivity of these patients along with drug therapy although it has improved the executive functions and depression of the patients.
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Affiliation(s)
- Fatemeh Zargar
- Department of Health Psychology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Naimeh Haghshenas
- Department of Psychiatry, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Rajabi
- Department of Psychiatry, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammad Javad Tarrahi
- Department of Epidemiology and Biostatistics, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
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28
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Seleznov I, Zyma I, Kiyono K, Tukaev S, Popov A, Chernykh M, Shpenkov O. Detrended Fluctuation, Coherence, and Spectral Power Analysis of Activation Rearrangement in EEG Dynamics During Cognitive Workload. Front Hum Neurosci 2019; 13:270. [PMID: 31440151 PMCID: PMC6694837 DOI: 10.3389/fnhum.2019.00270] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 07/19/2019] [Indexed: 12/31/2022] Open
Abstract
In the study of human cognitive activity using electroencephalogram (EEG), the brain dynamics parameters and characteristics play a crucial role. They allow to investigate the changes in functionality depending on the environment and task performance process, and also to access the intensity of the brain activity in various locations of the cortex and its dependencies. Usually, the dynamics of activation of different brain areas during the cognitive tasks are being studied by spectral analysis based on power spectral density (PSD) estimation, and coherence analysis, which are de facto standard tools in quantitative characterization of brain activity. PSD and coherence reflect the strength of oscillations and similarity of the emergence of these oscillations in the brain, respectively, while the concept of stability of brain activity over time is not well defined and less formalized. We propose to employ the detrended fluctuation analysis (DFA) as a measure of the EEG persistence over time, and use the DFA scaling exponent as its quantitative characteristics. We applied DFA to the study of the changes in activation in brain dynamics during mental calculations and united it with PSD and coherence estimation. In the experiment, EEGs during resting state and mental serial subtraction from 36 subjects were recorded and analyzed in four frequency ranges: θ1 (4.1-5.8 Hz), θ2 (5.9-7.4 Hz), β1 (13-19.9 Hz), and β2 (20-25 Hz). PSD maps to access the intensity of cortex activation and coherence to quantify the connections between different brain areas were calculated, the distribution of DFA scaling exponent over the head surface was exploited to measure the time characteristics of the dynamics of brain activity. Obtained arrangements of DFA scaling exponent suggest that normal functioning of the brain is characterized by long-term temporal correlations in the cortex. Topographical distribution of the DFA scaling exponent was comparable for θ and β frequency bands, demonstrating the largest values of DFA scaling exponent during cognitive activation. The study shows that the long-term temporal correlations evaluated by DFA can be of great interest for diagnosis of the variety of brain dysfunctions of different etiology in the future.
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Affiliation(s)
- Ivan Seleznov
- Department of Electronic Engineering, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine
| | - Igor Zyma
- Department of Physiology and Anatomy, Educational and Scientific Center “Institute of Biology and Medicine”, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine
| | - Ken Kiyono
- Division of Bioengineering, Graduate School of Engineering Science, Osaka University, Osaka, Japan
| | - Sergii Tukaev
- Department of Physiology of Brain and Psychophysiology, Educational and Scientific Centre “Institute of Biology and Medicine”, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine
- Department of Social Communication, Institute of Journalism, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine
- Laboratory on Theory and Methodic of Sport Preparation and Reserve Capabilities of Athletes, Scientific Research Institute, National University of Physical Education and Sports of Ukraine, Kyiv, Ukraine
| | - Anton Popov
- Department of Electronic Engineering, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine
- R&D Engineering, Ciklum, London, United Kingdom
| | - Mariia Chernykh
- Department of Biophysics and Medical Informatics, Educational and Scientific Center “Institute of Biology and Medicine”, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
| | - Oleksii Shpenkov
- Department of Physiology and Anatomy, Educational and Scientific Center “Institute of Biology and Medicine”, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine
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29
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Lee D, Kang DH, Ha NH, Oh CY, Lee U, Kang SW. Effects of an Online Mind-Body Training Program on the Default Mode Network: An EEG Functional Connectivity Study. Sci Rep 2018; 8:16935. [PMID: 30446714 PMCID: PMC6240056 DOI: 10.1038/s41598-018-34947-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 10/24/2018] [Indexed: 01/22/2023] Open
Abstract
Online mind-body training (MBT) programs can improve the psychological capabilities of practitioners. Although there has been a lot of effort to understand the neural mechanisms underlying the therapeutic effects of meditation, little is known about changes in electroencephalographic (EEG) functional connectivity that accompany mind-body training. The present study aimed to investigate how an online MBT program alters EEG functional connectivity in the default mode network (DMN). We assessed a group of healthcare providers, including 14 females who participated in the 4-week MBT program and 15 females who underwent a 4-week of waiting period. EEG data and information about psychological states were obtained at baseline and 4 weeks. The result was that the intervention group showed significant reductions in anxiety and trait anger that were accompanied by increased global DMN network strengths in the theta and alpha (but not beta and delta) frequency bands; these changes were not observed in the control group. Other variables including state anger, positive and negative affect, and self-esteem have not been changed over time in both groups. These findings suggest that practicing the mind-body training could have a relevance to the functional differences in network related to stress and anxiety reaction.
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Affiliation(s)
- Dasom Lee
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Do-Hyung Kang
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Psychiatry, Seoul National University Hospital, Seoul, Republic of Korea
- Emotional Information andCommunication Technology Industrial Association, Seoul, Republic of Korea
| | - Na-Hyun Ha
- Department of Brain-based Emotion Coaching, Global Cyber University, Seoul, Republic of Korea
| | - Chang-Young Oh
- Department of Brain-based Emotion Coaching, Global Cyber University, Seoul, Republic of Korea
| | - Ulsoon Lee
- Department of Brain-based Emotion Coaching, Global Cyber University, Seoul, Republic of Korea
| | - Seung Wan Kang
- Data Center for Korean EEG, College of Nursing, Seoul National University, Seoul, Republic of Korea.
- iMediSync Inc., Seoul, Republic of Korea.
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30
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Devipriya A, Nagarajan N. A Novel Method of Segmentation and Classification for Meditation in Health Care Systems. J Med Syst 2018; 42:193. [PMID: 30206721 DOI: 10.1007/s10916-018-1062-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 09/06/2018] [Indexed: 11/27/2022]
Abstract
Meditation improves positivity in behavioral as well as psychological changes, which are brought elucidated by knowing neuro-physiological consequences of meditation. In the field of cognitive science, neuroscience and physiological research, Electroencephalogram (EEG) is extensively utilized. The primary tasks of EEG signal analysis is to identify the noisy signal as well as enormous data that create signal processing and subsequent analysis. Beforehand any analysis of the EEG signal, the obtained raw signal must be preprocessed for eliminating undesirable artifacts as well as horrible noise. With the aim of resolving this issue, in this research, raw signals are preprocessed with the help of Band-Pass Filter (BPF) for noise removal method. Instead, in adaptive Sliding Window with Fuzzy C Means Clustering (SW-FCM) segmentation is presented, which precisely as well as automatically segments the signals. So as to analyze the accuracy, five features such as electroencephalography alpha spectrum, frequency of the main peak, Amplitude of the main peak, Higher Order Crossing (HOC), and wavelet features are used as the evaluating variables. Lastly to assess the meditation experience with Fuzzy Kernel least square Support Vector Machine (FKLSSVM) classifier, the presented method with a cross-sectional analysis is utilized. These two classifiers are utilized for meditation experience classification by utilizing an individual feature vector values from equivalent EEG signals. The dataset samples are gathered from Open source Brain-Computer Interface (Open BCI) platform. Outcomes attained are matched up for diverse techniques for identifying as well as for classifying signal segments features using MATLAB. Presented classifiers of the meditation process validate quick interpretation methods that differentiate meditation experience and valuable performance related to artificial approaches for the big-data analysis.
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Affiliation(s)
- A Devipriya
- Information Technology, Sri Krishna College of Engineering and Technology, Coimbatore, India.
| | - N Nagarajan
- Coimbatore Institute of Engineering and Technology, Narasipuram, India
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31
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Hendriks T. The effects of Sahaja Yoga meditation on mental health: a systematic review. JOURNAL OF COMPLEMENTARY & INTEGRATIVE MEDICINE 2018; 15:/j/jcim.2018.15.issue-3/jcim-2016-0163/jcim-2016-0163.xml. [PMID: 29847314 DOI: 10.1515/jcim-2016-0163] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 03/15/2018] [Indexed: 11/15/2022]
Abstract
Abstract
Objectives
To determine the efficacy of Sahaja Yoga (SY) meditation on mental health among clinical and healthy populations.
Methods
All publications on SY were eligible. Databases were searched up to November 2017, namely PubMed, MEDLINE (NLM), PsychINFO, and Scopus. An internet search (Google Scholar) was also conducted. The quality of the randomized controlled trails was assessed using the Cochrane Risk Assessment for Bias. The quality of cross-sectional studies, a non-randomized controlled trial and a cohort study was assessed with the Newcastle-Ottawa Quality Assessment Scale.
Results
We included a total of eleven studies; four randomized controlled trials, one non-randomized controlled trial, five cross-sectional studies, and one prospective cohort study. The studies included a total of 910 participants. Significant findings were reported in relation to the following outcomes: anxiety, depression, stress, subjective well-being, and psychological well-being. Two randomized studies were rated as high quality studies, two randomized studies as low quality studies. The quality of the non-randomized trial, the cross-sectional studies and the cohort study was high. Effect sizes could not be calculated in five studies due to unclear or incomplete reporting.
Conclusions
After reviewing the articles and taking the quality of the studies into account, it appears that SY may reduce depression and possibly anxiety. In addition, the practice of SY is also associated with increased subjective wellbeing and psychological well-beng. However, due to the limited number of publications, definite conclusions on the effects of SY cannot be made and more high quality randomized studies are needed to justify any firm conclusions on the beneficial effects of SY on mental health.
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Affiliation(s)
- Tom Hendriks
- Faculty of Social Sciences, Department of Psychology, Anton de Kom University of Suriname, Leysweg 86, P.O.B. 9212, Paramaribo, Suriname
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Valenza G, Greco A, Bianchi M, Nardelli M, Rossi S, Scilingo EP. EEG oscillations during caress-like affective haptic elicitation. Psychophysiology 2018; 55:e13199. [DOI: 10.1111/psyp.13199] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Revised: 04/09/2018] [Accepted: 04/12/2018] [Indexed: 01/26/2023]
Affiliation(s)
- Gaetano Valenza
- Department of Information Engineering and the Bioengineering and Robotics Research Center “E. Piaggio,” School of Engineering; University of Pisa; Pisa Italy
| | - Alberto Greco
- Department of Information Engineering and the Bioengineering and Robotics Research Center “E. Piaggio,” School of Engineering; University of Pisa; Pisa Italy
| | - Matteo Bianchi
- Department of Information Engineering and the Bioengineering and Robotics Research Center “E. Piaggio,” School of Engineering; University of Pisa; Pisa Italy
| | - Mimma Nardelli
- Department of Information Engineering and the Bioengineering and Robotics Research Center “E. Piaggio,” School of Engineering; University of Pisa; Pisa Italy
| | - Simone Rossi
- Brain Investigation & Neuromodulation Lab (Si-BIN Lab), Department of Medicine, Surgery and Neuroscience, Neurology and Clinical Neurophysiology Unit; University of Siena; Siena Italy
| | - Enzo Pasquale Scilingo
- Department of Information Engineering and the Bioengineering and Robotics Research Center “E. Piaggio,” School of Engineering; University of Pisa; Pisa Italy
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Cannabis Essential Oil: A Preliminary Study for the Evaluation of the Brain Effects. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 2018:1709182. [PMID: 29576792 PMCID: PMC5822802 DOI: 10.1155/2018/1709182] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 11/28/2017] [Accepted: 12/06/2017] [Indexed: 11/25/2022]
Abstract
We examined the effects of essential oil from legal (THC <0.2% w/v) hemp variety on the nervous system in 5 healthy volunteers. GC/EIMS and GC/FID analysis of the EO showed that the main components were myrcene and β-caryophyllene. The experiment consisted of measuring autonomic nervous system (ANS) parameters; evaluations of the mood state; and electroencephalography (EEG) recording before treatment, during treatment, and after hemp inhalation periods as compared with control conditions. The results revealed decreased diastolic blood pressure, increased heart rate, and significant increased skin temperature. The subjects described themselves as more energetic, relaxed, and calm. The analysis EEG showed a significant increase in the mean frequency of alpha (8–13 Hz) and significant decreased mean frequency and relative power of beta 2 (18,5–30 Hz) waves. Moreover, an increased power, relative power, and amplitude of theta (4–8 Hz) and alpha brain waves activities and an increment in the delta wave (0,5–4 Hz) power and relative power was recorded in the posterior region of the brain. These results suggest that the brain wave activity and ANS are affected by the inhalation of the EO of Cannabis sativa suggesting a neuromodular activity in cases of stress, depression, and anxiety.
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Chang PS, Knobf MT, Oh B, Funk M. Physical and psychological effects of Qigong exercise in community-dwelling older adults: An exploratory study. Geriatr Nurs 2018; 39:88-94. [DOI: 10.1016/j.gerinurse.2017.07.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 07/04/2017] [Accepted: 07/08/2017] [Indexed: 01/22/2023]
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35
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Sharma K, Chandra S, Dubey AK. Exploration of Lower Frequency EEG Dynamics and Cortical Alpha Asymmetry in Long-term Rajyoga Meditators. Int J Yoga 2018; 11:30-36. [PMID: 29343928 PMCID: PMC5769196 DOI: 10.4103/ijoy.ijoy_11_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Rajyoga meditation is taught by Prajapita Brahmakumaris World Spiritual University (Brahmakumaris) and has been followed by more than one million followers across the globe. However, rare studies were conducted on physiological aspects of rajyoga meditation using electroencephalography (EEG). Band power and cortical asymmetry were not studied with Rajyoga meditators. AIMS This study aims to investigate the effect of regular meditation practice on EEG brain dynamics in low-frequency bands of long-term Rajyoga meditators. SETTINGS AND DESIGN Subjects were matched for age in both groups. Lower frequency EEG bands were analyzed in resting and during meditation. MATERIALS AND METHODS Twenty-one male long-term meditators (LTMs) and same number of controls were selected to participate in study as par inclusion criteria. Semi high-density EEG was recorded before and during meditation in LTM group and resting in control group. The main outcome of the study was spectral power of alpha and theta bands and cortical (hemispherical) asymmetry calculated using band power. STATISTICAL ANALYSIS One-way ANOVA was performed to find the significant difference between EEG spectral properties of groups. Pearson's Chi-square test was used to find difference among demographics data. RESULTS Results reveal high-band power in alpha and theta spectra in meditators. Cortical asymmetry calculated through EEG power was also found to be high in frontal as well as parietal channels. However, no correlation was seen between the experience of meditation (years, hours) practice and EEG indices. CONCLUSION Overall findings indicate contribution of smaller frequencies (alpha and theta) while maintaining meditative experience. This suggests a positive impact of meditation on frontal and parietal areas of brain, involved in the processes of regulation of selective and sustained attention as well as provide evidence about their involvement in emotion and cognitive processing.
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Affiliation(s)
- Kanishka Sharma
- Department of Biomedical Engineering, Institute of Nuclear Medicine and Allied Science, DRDO, New Delhi, India
| | - Sushil Chandra
- Department of Biomedical Engineering, Institute of Nuclear Medicine and Allied Science, DRDO, New Delhi, India
| | - Ashok Kumar Dubey
- Division of Bioscience and Engineering, Netaji Subhas Institute of Technology, Delhi University, New Delhi, India
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Faber PL, Travis F, Milz P, Parim N. EEG microstates during different phases of Transcendental Meditation practice. Cogn Process 2017; 18:307-314. [PMID: 28451913 DOI: 10.1007/s10339-017-0812-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 04/24/2017] [Indexed: 11/28/2022]
Abstract
Two phases of Transcendental Meditation (TM)-transcending and undirected mentation-were compared to each other and to task-free resting using multichannel EEG recorded from 20 TM practitioners. An EEG microstate analysis identified four classes of microstates which were labeled A, B, C and D, based on their similarity to previously published classes. For each class of microstates, mean duration, coverage and occurrence were computed. Resting and transcending differed from undirected mentation with decreased prominence of Class A and increased prominence of Class D microstates. In addition, transcending showed decreased prominence of Class C microstates compared to undirected mentation. Based on previous findings on the functional significance of the microstate classes, the results indicate an increased reference to reality and decreased visualization during resting and transcending compared to undirected mentation. Also, our results indicate decreased saliency of internally generated mentations during transcending compared to undirected mentation reflecting a more detached and less evaluative processing. It is proposed that the continuous cycling through these two phases of meditation during a TM session might facilitate and train the flexible modulation of the parameters of these microstates of these particular classes which are known to be altered in psychiatric disorders. This might promote beneficial stabilizing effects for the practitioner of TM.
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Affiliation(s)
- Pascal L Faber
- The KEY Institute for Brain-Mind Research, Department of Psychiatry, Psychotherapy and Psychosomatics, University Hospital of Psychiatry, Lenggstr. 31, 8032, Zurich, Switzerland.
| | - Frederick Travis
- Center for Brain, Consciousness and Cognition, Maharishi University of Management, Fairfield, IA, USA
| | - Patricia Milz
- The KEY Institute for Brain-Mind Research, Department of Psychiatry, Psychotherapy and Psychosomatics, University Hospital of Psychiatry, Lenggstr. 31, 8032, Zurich, Switzerland
| | - Niyazi Parim
- Center for Brain, Consciousness and Cognition, Maharishi University of Management, Fairfield, IA, USA
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Lee YH, Hsieh YJ, Shiah YJ, Lin YH, Chen CY, Tyan YC, GengQiu J, Hsu CY, Chen SCJ. A cross-sectional evaluation of meditation experience on electroencephalography data by artificial neural network and support vector machine classifiers. Medicine (Baltimore) 2017; 96:e6612. [PMID: 28422856 PMCID: PMC5406072 DOI: 10.1097/md.0000000000006612] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
To quantitate the meditation experience is a subjective and complex issue because it is confounded by many factors such as emotional state, method of meditation, and personal physical condition. In this study, we propose a strategy with a cross-sectional analysis to evaluate the meditation experience with 2 artificial intelligence techniques: artificial neural network and support vector machine. Within this analysis system, 3 features of the electroencephalography alpha spectrum and variant normalizing scaling are manipulated as the evaluating variables for the detection of accuracy. Thereafter, by modulating the sliding window (the period of the analyzed data) and shifting interval of the window (the time interval to shift the analyzed data), the effect of immediate analysis for the 2 methods is compared. This analysis system is performed on 3 meditation groups, categorizing their meditation experiences in 10-year intervals from novice to junior and to senior. After an exhausted calculation and cross-validation across all variables, the high accuracy rate >98% is achievable under the criterion of 0.5-minute sliding window and 2 seconds shifting interval for both methods. In a word, the minimum analyzable data length is 0.5 minute and the minimum recognizable temporal resolution is 2 seconds in the decision of meditative classification. Our proposed classifier of the meditation experience promotes a rapid evaluation system to distinguish meditation experience and a beneficial utilization of artificial techniques for the big-data analysis.
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Affiliation(s)
- Yu-Hao Lee
- Department of Electrical Engineering, National Cheng Kung University, Tainan
| | - Ya-Ju Hsieh
- Department of Medical Imaging and Radiological Sciences, Kaohsiung Medical University
| | - Yung-Jong Shiah
- Graduate Institute of Counseling Psychology and Rehabilitation Counseling, National Kaohsiung Normal University
| | - Yu-Huei Lin
- Department of Electrical Engineering, National Cheng Kung University, Tainan
| | - Chiao-Yun Chen
- Department of Medical Imaging, Kaohsiung Medical University Hospital
| | - Yu-Chang Tyan
- Department of Medical Imaging and Radiological Sciences, Kaohsiung Medical University
- Center for Infectious Disease and Cancer Research, Kaohsiung Medical University
- Institute of Medical Science and Technology, National Sun Yat-sen University
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | | | - Chung-Yao Hsu
- Department of Neurology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Sharon Chia-Ju Chen
- Department of Medical Imaging and Radiological Sciences, Kaohsiung Medical University
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
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Tenke CE, Kayser J, Svob C, Miller L, Alvarenga JE, Abraham K, Warner V, Wickramaratne P, Weissman MM, Bruder GE. Association of posterior EEG alpha with prioritization of religion or spirituality: A replication and extension at 20-year follow-up. Biol Psychol 2017; 124:79-86. [PMID: 28119066 DOI: 10.1016/j.biopsycho.2017.01.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 12/10/2016] [Accepted: 01/15/2017] [Indexed: 12/20/2022]
Abstract
A prior report (Tenke et al., 2013 Biol. Psychol. 94:426-432) found that participants who rated religion or spirituality (R/S) highly important had greater posterior alpha after 10 years compared to those who did not. Participants who subsequently lowered their rating also had prominent alpha, while those who increased their rating did not. Here we report EEG findings 20 years after initial assessment. Clinical evaluations and R/S ratings were obtained from 73 (52 new) participants in a longitudinal study of family risk for depression. Frequency PCA of current source density transformed EEG concisely quantified posterior alpha. Those who initially rated R/S as highly important had greater alpha compared to those who did not, even if their R/S rating later increased. Furthermore, changes in religious denomination were associated with decreased alpha. Results suggest the possibility of a critical stage in the ontogenesis of R/S that is linked to posterior resting alpha.
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Affiliation(s)
- Craig E Tenke
- Division of Cognitive Neuroscience, NYS Psychiatric Institute, New York, NY, United States; Division of Epidemiology, NYS Psychiatric Institute, New York, NY, United States; Department of Psychiatry, Columbia University, College of Physicians and Surgeons, New York, NY, United States.
| | - Jürgen Kayser
- Division of Cognitive Neuroscience, NYS Psychiatric Institute, New York, NY, United States; Division of Epidemiology, NYS Psychiatric Institute, New York, NY, United States; Department of Psychiatry, Columbia University, College of Physicians and Surgeons, New York, NY, United States
| | - Connie Svob
- Division of Epidemiology, NYS Psychiatric Institute, New York, NY, United States; Department of Psychiatry, Columbia University, College of Physicians and Surgeons, New York, NY, United States
| | - Lisa Miller
- Department of Psychiatry, Columbia University, College of Physicians and Surgeons, New York, NY, United States; Columbia University, Teachers College, New York, NY, United States
| | - Jorge E Alvarenga
- Division of Cognitive Neuroscience, NYS Psychiatric Institute, New York, NY, United States
| | - Karen Abraham
- Division of Cognitive Neuroscience, NYS Psychiatric Institute, New York, NY, United States
| | - Virginia Warner
- Division of Epidemiology, NYS Psychiatric Institute, New York, NY, United States; Columbia University, Mailman School of Public Health, New York, NY, United States
| | - Priya Wickramaratne
- Division of Epidemiology, NYS Psychiatric Institute, New York, NY, United States; Department of Psychiatry, Columbia University, College of Physicians and Surgeons, New York, NY, United States; Columbia University, Mailman School of Public Health, New York, NY, United States
| | - Myrna M Weissman
- Division of Epidemiology, NYS Psychiatric Institute, New York, NY, United States; Department of Psychiatry, Columbia University, College of Physicians and Surgeons, New York, NY, United States; Columbia University, Mailman School of Public Health, New York, NY, United States
| | - Gerard E Bruder
- Division of Cognitive Neuroscience, NYS Psychiatric Institute, New York, NY, United States; Division of Epidemiology, NYS Psychiatric Institute, New York, NY, United States; Department of Psychiatry, Columbia University, College of Physicians and Surgeons, New York, NY, United States
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Electroencephalographic correlates of states of concentrative meditation. Int J Psychophysiol 2016; 110:27-39. [PMID: 27702643 DOI: 10.1016/j.ijpsycho.2016.09.020] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 09/29/2016] [Accepted: 09/30/2016] [Indexed: 11/23/2022]
Abstract
Meditative techniques aim for and meditators report states of mental alertness and focus, concurrent with physical and emotional calm. We aimed to determine the electroencephalographic (EEG) correlates of five states of Buddhist concentrative meditation, particularly addressing a correlation with meditative level. We studied 12 meditators and 12 pair-matched meditation-naïve participants using high-resolution scalp-recorded EEG. To maximise reduction of EMG, data were pre-processed using independent component analysis and surface Laplacian transformed data. Two non-meditative and five meditative states were used: resting baseline, mind-wandering, absorptions 1, 2, 3, 4 and 5 (corresponding to four levels of absorption and an absorption with a different object of focus, otherwise equivalent to level 4; these five meditative states produce repeatable, distinctly different experiences for experienced meditators). The experimental protocol required participants to experience the states in the order listed above, followed immediately by the reverse. We then calculated EEG power in standard frequency bands from 1 to 80Hz. We observed decreases of central scalp beta (13-25Hz), and central low gamma (25-48Hz) power in meditators during deeper absorptions. In contrast, we identified increases in frontal midline and temporo-parietal theta power in meditators, again, during deeper absorptions. Alpha activity was increased over all meditative states, not depth-related. This study demonstrates that the subjective experiences of deepening meditation partially correspond to measures of EEG. Our results are in accord with prior studies on non-graded meditative states. These results are also consistent with increased theta correlating with tightness of focus, and reduced beta/gamma with the desynchronization associated with enhanced alertness.
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Valenza G, Greco A, Gentili C, Lanata A, Sebastiani L, Menicucci D, Gemignani A, Scilingo EP. Combining electroencephalographic activity and instantaneous heart rate for assessing brain-heart dynamics during visual emotional elicitation in healthy subjects. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2016; 374:rsta.2015.0176. [PMID: 27044990 PMCID: PMC4822439 DOI: 10.1098/rsta.2015.0176] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/04/2016] [Indexed: 05/03/2023]
Abstract
Emotion perception, occurring in brain areas such as the prefrontal cortex and amygdala, involves autonomic responses affecting cardiovascular dynamics. However, how such brain-heart dynamics is further modulated by emotional valence (pleasantness/unpleasantness), also considering different arousing levels (the intensity of the emotional stimuli), is still unknown. To this extent, we combined electroencephalographic (EEG) dynamics and instantaneous heart rate estimates to study emotional processing in healthy subjects. Twenty-two healthy volunteers were elicited through affective pictures gathered from the International Affective Picture System. The experimental protocol foresaw 110 pictures, each of which lasted 10 s, associated to 25 different combinations of arousal and valence levels, including neutral elicitations. EEG data were processed using short-time Fourier transforms to obtain time-varying maps of cortical activation, whereas the associated instantaneous cardiovascular dynamics was estimated in the time and frequency domains through inhomogeneous point-process models. Brain-heart linear and nonlinear coupling was estimated through the maximal information coefficient (MIC). Considering EEG oscillations in theθband (4-8 Hz), MIC highlighted significant arousal-dependent changes between positive and negative stimuli, especially occurring at intermediate arousing levels through the prefrontal cortex interplay. Moreover, high arousing elicitations seem to mitigate changes in brain-heart dynamics in response to pleasant/unpleasant visual elicitation.
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Affiliation(s)
- G Valenza
- University of Pisa, Pisa, Italy Harvard Medical School, Massachusetts General Hospital, Boston, MA, USA
| | - A Greco
- University of Pisa, Pisa, Italy
| | - C Gentili
- University of Pisa, Pisa, Italy University of Padua, Padua, Italy
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Hernández SE, Suero J, Barros A, González-Mora JL, Rubia K. Increased Grey Matter Associated with Long-Term Sahaja Yoga Meditation: A Voxel-Based Morphometry Study. PLoS One 2016; 11:e0150757. [PMID: 26938433 PMCID: PMC4777419 DOI: 10.1371/journal.pone.0150757] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 02/18/2016] [Indexed: 01/07/2023] Open
Abstract
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.
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Affiliation(s)
| | - José Suero
- Centro de Salud Jazmín, Sermas, Madrid, Spain
| | - Alfonso Barros
- Department of Psychology, Universitat Jaume I, Castellón, Spain
| | | | - Katya Rubia
- Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
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Manuello J, Vercelli U, Nani A, Costa T, Cauda F. Mindfulness meditation and consciousness: An integrative neuroscientific perspective. Conscious Cogn 2016; 40:67-78. [DOI: 10.1016/j.concog.2015.12.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 12/02/2015] [Accepted: 12/16/2015] [Indexed: 01/23/2023]
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Hinterberger T, von Haugwitz A, Schmidt S. Does a Healing Procedure Referring to Theta Rhythms Also Generate Theta Rhythms in the Brain? J Altern Complement Med 2015; 22:66-74. [PMID: 26588598 DOI: 10.1089/acm.2014.0394] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND/OBJECTIVES ThetaHealing® (Vianna Stibal, Kalispell, MT) is a spiritual healing method in which the practitioner and client engage in joint meditations during several healing sessions. It is claimed that these meditation periods are characterized by a "theta state" in which the presence of theta-waves in the electroencephalograph (EEG) frequency spectrum of both the healer and the client is supposed. This study sought to test this hypothesis as well as the presence of synchronicities in the two EEGs. METHODS Measurements were obtained with a dual EEG system with 2 × 32 channels, allowing for simultaneous EEG measurements of healer and client. Ten healers and 10 clients performed 10 ThetaHealing sessions while the EEG was measured. RESULTS Theta frequency band did not increase in healers or in clients. Rather, the contrary was found, with a significant decrease in theta-2 band during healing in healers. Small correlations were seen between the Fourier amplitudes of healer and client in the theta-2 band, as well as small phase synchronicities in theta frequencies. CONCLUSION The hypothesis that ThetaHealing is associated with an enhanced generation of theta frequencies in the brain could not be confirmed. This finding makes no claim about whether ThetaHealing is beneficial from a clinical perspective.
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Affiliation(s)
- Thilo Hinterberger
- 1 Department of Psychosomatic Medicine, University Medical Center Regensburg , Regensburg, Germany
| | - Anna von Haugwitz
- 2 Academic Section Evaluation of Complementary Medicine, Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Freiburg , Freiburg, Germany
| | - Stefan Schmidt
- 2 Academic Section Evaluation of Complementary Medicine, Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Freiburg , Freiburg, Germany .,3 Institute of Transcultural Health Studies, European University Viadrina , Frankfurt (Oder), Germany
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Scheffold BE, Hsieh CL, Litscher G. Neuroimaging and Neuromonitoring Effects of Electro and Manual Acupuncture on the Central Nervous System: A Literature Review and Analysis. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2015; 2015:641742. [PMID: 26339269 PMCID: PMC4538975 DOI: 10.1155/2015/641742] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 09/15/2014] [Indexed: 11/18/2022]
Abstract
The aim of this review is to provide an overview of the different effects of manual and electroacupuncture on the central nervous system in studies with different neuroimaging interventions. The Database PubMed was searched from 1/1/2000 to 1/6/2014 with restriction to human studies in English language. Data collection for functional magnetic resonance (fMRI) studies was restricted to the period from 1/1/2010 to 1/6/2014 due to a recently published review which included all published randomized and nonrandomized controlled clinical studies as well as observational studies with control groups, no blinding required. Only studies comparing manual or electroacupuncture with sham acupuncture were eligible. All participants were healthy adult men and women. A majority of 25 studies compared manual versus sham, a minority of 7 trials compared electro versus sham and only 1 study compared electro versus manual acupuncture. In 29 out of 33 studies verum acupuncture results were found to present either more or different modulation effects on neurological components measured by neuroimaging and neuromonitoring methods than sham acupuncture. Only four studies reported no effects of verum in comparison to sham acupuncture. Evaluation of the very heterogeneous results shows evidence that verum acupuncture elicits more modulation effects on neurological components than sham acupuncture.
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Affiliation(s)
- Brigitte Elisabeth Scheffold
- Graduate Institute of Acupuncture Science, International Master Program, China Medical University, Taichung 40402, Taiwan
| | - Ching-Liang Hsieh
- Graduate Institute of Integrated Medicine, China Medical University, Taichung 40402, Taiwan
| | - Gerhard Litscher
- China Medical University, Taichung 40402, Taiwan
- Research Unit for Complementary and Integrative Laser Medicine, Research Unit of Biomedical Engineering in Anesthesia and Intensive Care Medicine, and TCM Research Center Graz, Medical University of Graz, 8036 Graz, Austria
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Burgener SC, Jao YL, Anderson JG, Bossen AL. Mechanism of Action for Nonpharmacological Therapies for Individuals With Dementia: Implications for Practice and Research. Res Gerontol Nurs 2015; 8:240-59. [DOI: 10.3928/19404921-20150429-02] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Accepted: 02/02/2015] [Indexed: 12/17/2022]
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Abstract
Meditation is commonly thought to induce physiologically quiescent states, as evidenced by decreased autonomic parameters during the meditation practice including reduced heart rate, respiratory rate, blood pressure, skin conductance, and increased alpha activity in the electroencephalogram. Preliminary empirical support for this idea was provided in a case report by Dimsdale and Mills (2002), where it was found that meditation seemed to regulate increased levels of cardiovascular arousal induced by bolus isoproterenol infusions. In that study, while meditating, a self-taught meditator exhibited unexpected decreases in heart rate while receiving moderate intravenous doses of the beta adrenergic agonist isoproterenol. This effect was no longer observed when the individual received isoproterenol infusions while not meditating. The current study was designed to explore this phenomenon empirically in a group of formally trained meditators. A total of 15 meditators and 15 non-meditators individually matched on age, sex, and body mass index were recruited. Participants received four series of infusions in a pseudorandomized order: isoproterenol while meditating (or during a relaxation condition for the non-meditators), isoproterenol while resting, saline while meditating (or during a relaxation condition for the non-meditators), and saline while resting. Heart rate was continuously measured throughout all infusions, and several measures of heart rate were derived from the instantaneous cardiac waveform. There was no evidence at the group or individual level suggesting that meditation reduced the cardiovascular response to isoproterenol, across all measures. These results suggest that meditation is not associated with increased regulation of elevated cardiac adrenergic tone.
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Affiliation(s)
- Sahib S Khalsa
- Department of Neurology, University of Iowa Iowa City, IA, USA ; Laureate Institute for Brain Research Tulsa, OK, USA ; Faculty of Community Medicine, University of Tulsa Tulsa, OK, USA
| | - David Rudrauf
- Department of Neurology, University of Iowa Iowa City, IA, USA ; Laboratory of Functional Imaging, Institut National de la Santé et de la Recherche Médicale U678s/Université Pierre et Marie Curie Paris, France
| | - Richard J Davidson
- Department of Psychology, University of Wisconsin-Madison Madison, WI, USA
| | - Daniel Tranel
- Department of Neurology, University of Iowa Iowa City, IA, USA ; Department of Psychology, University of Iowa Iowa City, IA, USA
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Abstract
Electroencephalography (EEG)-based functional brain networks have been investigated frequently in health and disease. It has been shown that a number of graph theory metrics are disrupted in brain disorders. EEG-based brain networks are often studied in the whole-brain framework, where all the nodes are grouped into a single network. In this study, we studied the brain networks in two hemispheres and assessed whether there are any hemispheric-specific patterns in the properties of the networks. To this end, resting state closed-eyes EEGs from 44 healthy individuals were processed and the network structures were extracted separately for each hemisphere. We examined neurophysiologically meaningful graph theory metrics: global and local efficiency measures. The global efficiency did not show any hemispheric asymmetry, whereas the local connectivity showed rightward asymmetry for a range of intermediate density values for the constructed networks. Furthermore, the age of the participants showed significant direct correlations with the global efficiency of the left hemisphere, but only in the right hemisphere, with local connectivity. These results suggest that only local connectivity of EEG-based functional networks is associated with brain hemispheres.
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Mindfulness Trait Predicts Neurophysiological Reactivity Associated with Negativity Bias: An ERP Study. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:212368. [PMID: 26124852 PMCID: PMC4466385 DOI: 10.1155/2015/212368] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Revised: 04/22/2015] [Accepted: 05/03/2015] [Indexed: 01/09/2023]
Abstract
This study explored the relationship of mindfulness trait with the early and late stages of affective processing, by examining the two corresponding ERP components, P2 and LPP, collected from twenty-two male Chinese participants with a wide range of meditation experiences. Multiple regression analyses was performed on the mindfulness scores, as measured by CAMS-R, with the subjective affective ratings and ERP data collected during an emotion processing task. The results showed that increased mindfulness scores predicted increased valence ratings of negative stimuli (less negative), as well as increased P2 amplitudes at the frontocentral location for positive compared to negative stimuli. Based on these findings, a plausible mechanism of mindfulness in reducing negativity bias was discussed. Moreover, our results replicated previous findings on the age-related increase of P2 amplitudes at the frontal sites for positive compared to neutral stimuli. Since the locations at which P2 amplitudes were found as associated with age and mindfulness differed, as did the emotional contents of the stimuli being compared, indicating that the effect of age did not confound our findings on mindfulness and the two factors might operate on early affective processing from distinct sources and mechanisms.
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Sharma A, Newberg AB. Mind-Body Practices and the Adolescent Brain: Clinical Neuroimaging Studies. ADOLESCENT PSYCHIATRY 2015; 5:116-124. [PMID: 27347478 DOI: 10.2174/2210676605666150311223728] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Mind-Body practices constitute a large and diverse group of practices that can substantially affect neurophysiology in both healthy individuals and those with various psychiatric disorders. In spite of the growing literature on the clinical and physiological effects of mind-body practices, very little is known about their impact on central nervous system (CNS) structure and function in adolescents with psychiatric disorders. METHOD This overview highlights findings in a select group of mind-body practices including yoga postures, yoga breathing techniques and meditation practices. RESULTS Mind-body practices offer novel therapeutic approaches for adolescents with psychiatric disorders. Findings from these studies provide insights into the design and implementation of neuroimaging studies for adolescents with psychiatric disorders. CONCLUSIONS Clinical neuroimaging studies will be critical in understanding how different practices affect disease pathogenesis and symptomatology in adolescents. Neuroimaging of mind-body practices on adolescents with psychiatric disorders will certainly be an open and exciting area of investigation.
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Affiliation(s)
- Anup Sharma
- University of Pennsylvania School of Medicine, USA
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Krishnakumar D, Hamblin MR, Lakshmanan S. Meditation and Yoga can Modulate Brain Mechanisms that affect Behavior and Anxiety-A Modern Scientific Perspective. ANCIENT SCIENCE 2015; 2:13-19. [PMID: 26929928 PMCID: PMC4769029 DOI: 10.14259/as.v2i1.171] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Meditation and Yoga techniques are receiving increased attention throughout the world, due to the accumulation of evidence based research that proves the direct and indirect benefits of such practices. Based on studies conducted so far, it has been found that the practice of meditation triggers neurotransmitters that modulate psychological disorders such as anxiety. This paper will review the psychological effects of the practice of meditation, the role of neurotransmitters, and studies using EEG and fMRI.
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Affiliation(s)
- Divya Krishnakumar
- World Institute for Scientific Exploration, Baltimore, MD
21210, USA
- Center for Brain and Cognition, University of California,
San Diego, CA, USA
| | - Michael R Hamblin
- Wellman Center for Photomedicine, Massachusetts General
Hospital, Boston, MA, USA
- Department of Dermatology, Harvard Medical School, Boston,
MA USA
- Harvard-MIT Division of Health Sciences and Technology,
Cambridg, MA, USA
| | - Shanmugamurthy Lakshmanan
- World Institute for Scientific Exploration, Baltimore, MD
21210, USA
- Wellman Center for Photomedicine, Massachusetts General
Hospital, Boston, MA, USA
- Department of Dermatology, Harvard Medical School, Boston,
MA USA
| |
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