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Razza LB, De Smet S, Cornelis X, Nikolin S, Pulopulos MM, De Raedt R, Brunoni AR, Vanderhasselt MA. Dose-dependent response of prefrontal transcranial direct current stimulation on the heart rate variability: An electric field modeling study. Psychophysiology 2024; 61:e14556. [PMID: 38459778 DOI: 10.1111/psyp.14556] [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: 09/04/2023] [Revised: 02/01/2024] [Accepted: 02/20/2024] [Indexed: 03/10/2024]
Abstract
Transcranial direct current stimulation (tDCS) of the prefrontal cortex (PFC) modulates the autonomic nervous system by activating deeper brain areas via top-down pathway. However, effects on the nervous system are heterogeneous and may depend on the amount of current that penetrates. Therefore, we aimed to investigate the variable effects of tDCS on heart rate variability (HRV), a measure of the functional state of the autonomic nervous system. Using three prefrontal tDCS protocols (1.5, 3 mA and sham), we associated the simulated individual electric field (E-field) magnitude in brain regions of interest with the HRV effects. This was a randomized, double-blinded, sham-controlled and within-subject trial, in which healthy young-adult participants received tDCS sessions separated by 2 weeks. The brain regions of interest were the dorsolateral PFC (DLPFC), anterior cingulate cortex, insula and amygdala. Overall, 37 participants were investigated, corresponding to a total of 111 tDCS sessions. The findings suggested that HRV, measured by root mean squared of successive differences (RMSSD) and high-frequency HRV (HF-HRV), were significantly increased by the 3.0 mA tDCS when compared to sham and 1.5 mA. No difference was found between sham and 1.5 mA. E-field analysis showed that all brain regions of interest were associated with the HRV outcomes. However, this significance was associated with the protocol intensity, rather than inter-individual brain structural variability. To conclude, our results suggest a dose-dependent effect of tDCS for HRV. Therefore, further research is warranted to investigate the optimal current dose to modulate HRV.
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Affiliation(s)
- Laís B Razza
- Department of Head and Skin, Psychiatry and Medical Psychology, Ghent University Hospital, Ghent University, Ghent, Belgium
- Ghent Experimental Psychiatry (GHEP) Lab, Ghent University, Ghent, Belgium
| | - Stefanie De Smet
- Department of Head and Skin, Psychiatry and Medical Psychology, Ghent University Hospital, Ghent University, Ghent, Belgium
- Ghent Experimental Psychiatry (GHEP) Lab, Ghent University, Ghent, Belgium
| | - Xander Cornelis
- Ghent Experimental Psychiatry (GHEP) Lab, Ghent University, Ghent, Belgium
| | - Stevan Nikolin
- School of Psychiatry, University of New South Wales, Sydney, New South Wales, Australia
- Black Dog Institute, Sydney, New South Wales, Australia
| | - Matias M Pulopulos
- Department of Experimental Clinical and Health Psychology, Ghent University, Ghent, Belgium
| | - Rudi De Raedt
- Department of Experimental Clinical and Health Psychology, Ghent University, Ghent, Belgium
| | - Andre R Brunoni
- Departamento de Clínica Médica, Faculdade de Medicina da Universidade de São Paulo & Hospital Universitário, Universidade de São Paulo, São Paulo, Brazil
- Hospital Universitário, Universidade de São Paulo, São Paulo, Brazil
- Serviço Interdisciplinar de Neuromodulação, Laboratório de Neurociências (LIM-27), Departamento e Instituto de Psiquiatria, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Marie-Anne Vanderhasselt
- Department of Head and Skin, Psychiatry and Medical Psychology, Ghent University Hospital, Ghent University, Ghent, Belgium
- Ghent Experimental Psychiatry (GHEP) Lab, Ghent University, Ghent, Belgium
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Colditz IG, Campbell DLM, Ingham AB, Lee C. Review: Environmental enrichment builds functional capacity and improves resilience as an aspect of positive welfare in production animals. Animal 2024; 18:101173. [PMID: 38761442 DOI: 10.1016/j.animal.2024.101173] [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: 10/04/2023] [Revised: 04/15/2024] [Accepted: 04/18/2024] [Indexed: 05/20/2024] Open
Abstract
The success of the animal in coping with challenges, and in harnessing opportunities to thrive, is central to its welfare. Functional capacity describes the capacity of molecules, cells, organs, body systems, the whole animal, and its community to buffer against the impacts of environmental perturbations. This buffering capacity determines the ability of the animal to maintain or regain functions in the face of environmental perturbations, which is recognised as resilience. The accuracy of physiological regulation and the maintenance of homeostatic balance underwrite the dynamic stability of outcomes such as biorhythms, feed intake, growth, milk yield, and egg production justifying their assessment as indicators of resilience. This narrative review examines the influence of environmental enrichments, especially during developmental stages in young animals, in building functional capacity and in its subsequent expression as resilience. Experience of enriched environments can build skills and competencies across multiple functional domains including but not limited to behaviour, immunity, and metabolism thereby increasing functional capacity and facilitating resilience within the context of challenges such as husbandry practices, social change, and infection. A quantitative method for measuring the distributed property of functional capacity may improve its assessment. Methods for analysing embedded energy (emergy) in ecosystems may have utility for this goal. We suggest functional capacity provides the common thread that links environmental enrichments with an ability to express resilience and may provide a novel and useful framework for measuring and reporting resilience. We conclude that the development of functional capacity and its subsequent expression as resilience is an aspect of positive animal welfare. The emergence of resilience from system dynamics highlights a need to shift from the study of physical and mental states to the study of physical and mental dynamics to describe the positive dimension of animal welfare.
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Affiliation(s)
- I G Colditz
- Agriculture and Food, CSIRO, Armidale, NSW 2350, Australia.
| | - D L M Campbell
- Agriculture and Food, CSIRO, Armidale, NSW 2350, Australia
| | - A B Ingham
- Agriculture and Food, CSIRO, St. Lucia, QLD 4067, Australia
| | - C Lee
- Agriculture and Food, CSIRO, Armidale, NSW 2350, Australia
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Li Z, Pulopulos M, Allaert J, De Smet S, De Wandel L, Kappen M, Puttevils L, Razza LB, Schoonjans E, Vanhollebeke G, Baeken C, De Raedt R, Vanderhasselt MA. Vagally-mediated HRV as a marker of trait rumination in healthy individuals? A large cross-sectional analysis. Psychophysiology 2024; 61:e14448. [PMID: 37779356 DOI: 10.1111/psyp.14448] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 08/29/2023] [Accepted: 08/29/2023] [Indexed: 10/03/2023]
Abstract
The tendency to ruminate (i.e., repetitive, self-referential, negative thoughts) is a maladaptive form of emotional regulation and represents a transdiagnostic vulnerability factor for stress-related psychopathology. Vagally-mediated heart rate variability (vmHRV) provides a non-invasive, surrogate measure of vagal modulation of the heart, and higher HRV is considered an indicator of susceptibility, or ability to respond to stress. Past research has suggested a link between trait rumination and vmHRV; however, inconsistent results exist in healthy individuals. In this study, we investigated the association between the tendency to ruminate, brooding, and reflection (using the Ruminative Response Scale) with vmHRV measured at baseline in a healthy population using a large cross-sectional dataset (N = 1189, 88% female; mean age = 21.55, ranging from 17 to 48 years old), which was obtained by combining samples of healthy individuals from different studies from our laboratory. The results showed no cross-sectional correlation between vmHRV and trait rumination (confirmed by Bayesian analysis), even after controlling for important confounders such as gender, age, and depressive symptoms. Also, a non-linear relationship was rejected. In summary, based on our results in a large sample of healthy individuals, vmHRV is not a marker of trait rumination (as measured by the Ruminative Response Scale).
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Affiliation(s)
- Zefeng Li
- Department of Head and Skin, Ghent Experimental Psychiatry Lab, Ghent University, Ghent, Belgium
| | - Matias Pulopulos
- Department of Experimental Clinical and Health Psychology, Ghent University, Ghent, Belgium
| | - Jens Allaert
- Department of Head and Skin, Ghent Experimental Psychiatry Lab, Ghent University, Ghent, Belgium
- Department of Experimental Clinical and Health Psychology, Ghent University, Ghent, Belgium
| | - Stefanie De Smet
- Department of Head and Skin, Ghent Experimental Psychiatry Lab, Ghent University, Ghent, Belgium
| | - Linde De Wandel
- Department of Head and Skin, Ghent Experimental Psychiatry Lab, Ghent University, Ghent, Belgium
| | - Mitchel Kappen
- Department of Head and Skin, Ghent Experimental Psychiatry Lab, Ghent University, Ghent, Belgium
| | - Louise Puttevils
- Department of Head and Skin, Ghent Experimental Psychiatry Lab, Ghent University, Ghent, Belgium
| | - Lais B Razza
- Department of Head and Skin, Ghent Experimental Psychiatry Lab, Ghent University, Ghent, Belgium
| | - Emmanuelle Schoonjans
- Department of Head and Skin, Ghent Experimental Psychiatry Lab, Ghent University, Ghent, Belgium
| | - Gert Vanhollebeke
- Department of Head and Skin, Ghent Experimental Psychiatry Lab, Ghent University, Ghent, Belgium
| | - Chris Baeken
- Department of Head and Skin, Ghent Experimental Psychiatry Lab, Ghent University, Ghent, Belgium
- Department of Psychiatry (UZ Brussel), Vrije Universiteit Brussel, Ixelles, Belgium
- Department of Electrical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Rudi De Raedt
- Department of Experimental Clinical and Health Psychology, Ghent University, Ghent, Belgium
| | - Marie-Anne Vanderhasselt
- Department of Head and Skin, Ghent Experimental Psychiatry Lab, Ghent University, Ghent, Belgium
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Allende S, Mathersul DC, Schulz-Heik JR, Avery TJ, Mahoney L, Bayley PJ. Yoga is effective for treating chronic pain in veterans with Gulf War Illness at long-term follow-up. BMC Complement Med Ther 2023; 23:319. [PMID: 37704984 PMCID: PMC10498617 DOI: 10.1186/s12906-023-04145-y] [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: 03/31/2023] [Accepted: 08/29/2023] [Indexed: 09/15/2023] Open
Abstract
BACKGROUND Clinical Practice Guidelines for Gulf War Illness (GWI) recommend integrative health approaches such as yoga for relief from symptoms, yet little is known about the long-term efficacy of yoga in reducing symptoms of GWI. Here, we evaluated the long-term efficacy of yoga and cognitive-behavioral therapy (CBT) chronic pain treatment in a randomized controlled trial (RCT) of 75 Veterans (57 men, 42-71 ± 7.1 years of age) with Gulf War Illness (GWI). METHODS Participants received either 10 weeks of yoga or 10 weeks of CBT for chronic pain. The primary outcome measures were pain severity, and pain interference (Brief Pain Inventory-Short Form). The secondary outcome measures were fatigue, as indicated by a measure of functional exercise capacity (6-Minute Walk Test), depression, autonomic symptom severity, and quality of life. Piecewise linear mixed models were used to examine study hypotheses. RESULTS Compared to the CBT group, yoga was associated with greater reductions in pain severity during the 6-month follow-up period (group × time interaction: b = 0.036, se = 0.014, p = .011). Although we did not find between-group differences in the other primary or secondary outcome measures during follow-up (p's > 0.05), exploratory analyses revealed within-group improvements in pain interference, total pain (an experimental outcome variable which combines pain severity and interference), and fatigue in the yoga group (p's < 0.05) but not in the CBT group. CONCLUSIONS This is the first study to report long-term follow-up results of yoga as a treatment for GWI. Our results suggest that yoga may offer long-term efficacy in reducing pain, which is a core symptom of GWI. TRIAL REGISTRATION Secondary analyses of ClinicalTrials.gov NCT02378025.
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Affiliation(s)
- Santiago Allende
- War Related Illness and Injury Study Center, VA Palo Alto Health Care System, Palo Alto, CA, USA.
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA.
| | - Danielle C Mathersul
- War Related Illness and Injury Study Center, VA Palo Alto Health Care System, Palo Alto, CA, USA
- School of Psychology, Murdoch University, Murdoch, WA, 6150, Australia
- Centre for Molecular Medicine and Innovative Therapeutics, Health Futures Institute, Murdoch University, Murdoch, WA, 6150, Australia
| | - Jay R Schulz-Heik
- War Related Illness and Injury Study Center, VA Palo Alto Health Care System, Palo Alto, CA, USA
- Peninsula Behavioral Health, CA, Palo Alto, 94306, USA
| | - Timothy J Avery
- War Related Illness and Injury Study Center, VA Palo Alto Health Care System, Palo Alto, CA, USA
- Department of Veterans Affairs, Peninsula Vet Center, Menlo Park, CA, 94025, United States of America
| | - Louise Mahoney
- War Related Illness and Injury Study Center, VA Palo Alto Health Care System, Palo Alto, CA, USA
| | - Peter J Bayley
- War Related Illness and Injury Study Center, VA Palo Alto Health Care System, Palo Alto, CA, USA
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA
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Face your heart: resting vagally mediated Heart Rate Variability Shapes Social Attributions from facial appearance. CURRENT PSYCHOLOGY 2023. [DOI: 10.1007/s12144-023-04339-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
AbstractPhylogenetic theories suggest resting vagally mediated heart rate variability (vmHRV) as a biomarker for adaptive behavior in social encounters. Until now, no study has examined whether vmHRV can predict individual differences in inferring personality traits and intentions from facial appearance. To test this hypothesis, resting vmHRV was recorded in 83 healthy individuals before they rated a series of faces based on their first impression of trustworthiness, dominance, typicality, familiarity, caring, and attractiveness. We found an association between individual differences in vmHRV and social attributions from facial appearance. Specifically, higher levels of vmHRV predicted higher scores on ratings of caring and trustworthiness, suggesting that strangers’ faces are more likely to be perceived as safer. The present results suggest that higher levels of vmHRV (compared with lower levels of vmHRV) are associated with the tendency to minimize social evaluative threat and maximize affiliative social cues at a first glance of others’ faces.
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Zagaria A, Ottaviani C, Lombardo C, Ballesio A. Perseverative Cognition as a Mediator Between Perceived Stress and Sleep Disturbance: A Structural Equation Modeling Meta-analysis (meta-SEM). Ann Behav Med 2022; 57:463-471. [DOI: 10.1093/abm/kaac064] [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] Open
Abstract
Abstract
Background
According to the perseverative cognition (PC) hypothesis, the repetitive chronic activation of the cognitive representations of stressors are associated with a concomitant prolonged and sustained physiological stress response, including sleep disruption.
Purpose
We conducted a systematic review and structural equation modeling meta-analysis (meta-SEM) on PC as mediator of the association between perceived stress and subjective sleep disturbance (i.e., difficulties falling asleep or maintaining sleep).
Methods
PubMed, Scopus, Medline, CINAHL, and PsycInfo were searched up to September 2021. To test mediation, only longitudinal studies assessing the predictor (perceived stress) at T0, the mediator (PC) at T1, and the outcome (sleep disturbance) at T2, were eligible.
Results
Findings on 3,733 individuals (k = 8) showed a significant component effect of perceived stress on PC (β = 0.340, p < .001), which in turn was related to sleep disturbance (β = 0.258, p < .001). The direct effect of stress on sleep disturbance was significant (β = 0.133, p < .001). Lastly, the indirect effect between stress and sleep disturbance via PC supported the mediation hypothesis (β = 0.09, 95% CI 0.078–0.100). The mediation path remained significant (β = 0.03, 95% CI 0.020–0.036) after adjusting for baseline sleep disturbance. Further leave-one-out sensitivity and control analyses confirmed that all direct and indirect effects were not driven by any single study included in the meta-analysis, as well as their robustness when controlling for sex and age, respectively.
Conclusions
Overall, results of this meta-analysis indicate that PC may be one of the mechanisms explaining how perceived stressful experiences lead to subjective sleep disturbance.
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Affiliation(s)
- Andrea Zagaria
- Department of Psychology, Sapienza University of Rome , Rome , Italy
| | | | - Caterina Lombardo
- Department of Psychology, Sapienza University of Rome , Rome , Italy
| | - Andrea Ballesio
- Department of Psychology, Sapienza University of Rome , Rome , Italy
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Laborde S, Allen MS, Borges U, Dosseville F, Hosang TJ, Iskra M, Mosley E, Salvotti C, Spolverato L, Zammit N, Javelle F. Effects of voluntary slow breathing on heart rate and heart rate variability: A systematic review and a meta-analysis. Neurosci Biobehav Rev 2022; 138:104711. [PMID: 35623448 DOI: 10.1016/j.neubiorev.2022.104711] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 05/20/2022] [Accepted: 05/21/2022] [Indexed: 10/18/2022]
Abstract
Voluntary slow breathing (VSB) is used as a prevention technique to support physical and mental health, given it is suggested to influence the parasympathetic nervous system (PNS). However, to date, no comprehensive quantitative review exists to support or refute this claim. We address this through a systematic review and meta-analysis of the effects of VSB on heart rate variability (HRV). Specifically, we focus on HRV parameters indexing PNS activity regulating cardiac functioning, referred to as vagally-mediated (vm)HRV: (1) during the breathing session (i.e., DURING), (2) immediately after one training session (i.e., IM-AFTER1), as well as (3) after a multi-session intervention (i.e., AFTER-INT). From the 1842 selected abstracts, 223 studies were suitable for inclusion (172 DURING, 16 IM-AFTER1, and 49 AFTER-INT). Results indicate increases in vmHRV with VSB, DURING, IM-AFTER1, and AFTER-INT. Given the involvement of the PNS in a large range of health-related outcomes and conditions, VSB exercises could be advised as a low-tech and low-cost technique to use in prevention and adjunct treatment purposes, with few adverse effects expected.
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Affiliation(s)
- S Laborde
- Department of Performance Psychology, Institute of Psychology, German Sport University Cologne, Germany; EA 4260, UFR STAPS, Normandie Université Caen, France.
| | - M S Allen
- Department of Psychology, University of Wollongong, Wollongong, Australia
| | - U Borges
- Department of Performance Psychology, Institute of Psychology, German Sport University Cologne, Germany; Department of Social & Health Psychology, Institute of Psychology, German Sport University Cologne, Germany
| | - F Dosseville
- INSERM, UMR-S 1075 COMETE, Normandie Université Caen, France
| | - T J Hosang
- Experimental Psychology Unit, Helmut Schmidt University, Hamburg, Germany
| | - M Iskra
- Department of Performance Psychology, Institute of Psychology, German Sport University Cologne, Germany
| | - E Mosley
- Solent University, Southampton, UK
| | - C Salvotti
- Department of Performance Psychology, Institute of Psychology, German Sport University Cologne, Germany
| | - L Spolverato
- Department of Performance Psychology, Institute of Psychology, German Sport University Cologne, Germany
| | - N Zammit
- Department of Performance Psychology, Institute of Psychology, German Sport University Cologne, Germany
| | - F Javelle
- Department for Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sport University Cologne,Germany
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Flynn M, Campbell I, Schmidt U. Does concurrent self-administered transcranial direct current stimulation and attention bias modification training improve symptoms of binge eating disorder? Protocol for the TANDEM feasibility randomized controlled trial. Front Psychiatry 2022; 13:949246. [PMID: 35990072 PMCID: PMC9382293 DOI: 10.3389/fpsyt.2022.949246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 07/18/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Binge eating disorder (BED) is a common and disabling problem associated with impaired cognitive control. Preliminary studies show that brain-directed treatments, including transcranial direct current stimulation (tDCS) and attention bias modification training (ABMT), improve cognitive control and alleviate symptoms of BED. When combined, tDCS may enhance the effects of ABMT, and vice versa, thereby improving treatment outcomes. METHODS This protocol describes a feasibility single-blind randomized sham-controlled trial of concurrent self-administered tDCS and ABMT in adults with BED (The TANDEM Trial). Eighty adults with BED will be randomly assigned to one of four groups: ABMT with real or sham self-administered tDCS, ABMT only, or waiting list control. In the treatment arms, participants will complete 10-sessions of their allocated intervention over 2-3 weeks. Outcomes will be assessed at baseline (T0), immediately post treatment (T1), and 6 weeks after end of treatment (T2), and at comparable timepoints for participants in the waitlist control group. Feasibility will be evaluated by assessing recruitment/retention rates and blinding success. Acceptability will be assessed quantitatively via participant ratings and qualitatively via semi-structured interviews. Episodes of binge eating at follow-up will be the primary clinical outcome and rate ratios from Poisson regression will be reported. Secondary outcomes will assess changes in ED and general psychopathology, attention bias toward high calorie foods, and executive function. DISCUSSION It is hoped that data from the trial will contribute to the development of neurobiologically informed treatments for BED, provide insights into the potential use of at-home variants of tDCS, and inform the design of future large scale trials.
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Affiliation(s)
- Michaela Flynn
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom
| | - Iain Campbell
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom
| | - Ulrike Schmidt
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom.,South London and Maudsley NHS Foundation Trust, London, United Kingdom
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