Applied Psychophysiology and Biofeedback最新文献

Dyssynergic defecation(DD) is the inability to coordinate abdominal and anorectal muscle contraction during defecation. Patients with constipation often report poor quality of life, sleep issues, and increased risk of mood disorders. Biofeedback is a recommended treatment for DD. we evaluated the effect of EMG-biofeedback on constipation symptoms as the primary outcome and also on insomnia, mood disorders (depression and anxiety), and quality of life as secondary outcomes in patients with dyssynergic defecation. Thirty-one patients with DD (74.2% women, mean age 46.23 ± 13.42 years), diagnosed using Rome IV criteria, Bristol Stool Form Scale, and anorectal manometry, were included. Patients underwent six to ten sessions of EMG-based biofeedback. We evaluated symptoms using the Wexner constipation questionnaire, Visual Analog Scale (VAS), SF-36 for quality of life, Insomnia Severity Index (ISI), and Hamilton questionnaires for anxiety and depression (HAM-A and HAM-D) before and after treatment. As consistent with study hypotheses, the Wexner scores significantly improved after biofeedback (p < 0.0001, t = 6.98). ISI scores improved (p = 0.01, t = 2.74), as did VAS scores (p < 0.0001, t = 5.14). HAM-A and HAM-D scores showed significant reductions (HAM-A: p = 0.0001, t = 5.01; HAM-D: p = 0.003, t = 2.17). However, SF-36 did not show significant improvement in quality of life (p > 0.05, t = -0.93). Biofeedback effectively improved constipation symptoms, insomnia, and mood disorders but did not impact quality of life.

Resonance frequency (RF) is characterized as the specific frequency at which a system, equipped with delayed self-correction or negative feedback mechanisms, exhibits maximal amplitude oscillations in response to an external stimulus of a particular frequency. Emerging evidence suggests that the cardiovascular system has an inherent RF, and that breathing at this frequency can markedly enhance health and cardiovascular function. However, the efficacy of resonance frequency breathing (RFB) and the specific responses of the cardiovascular, respiratory, and central nervous systems during RFB remain unclear. In this study, we recruited 27 healthy young male subjects (aged 20–30 years) and used the corrected sliding method to accurately determine each subject’s RF. We then investigated cardiovascular activity, cardiorespiratory coupling, and the brain-cardiovascular network to clarify the effects and mechanisms associated with RFB. Our results indicate that: (a) the corrected sliding method can precisely evaluate RF; (b) the reduction in blood pressure is unique to RFB and not observed in other slow-paced breathing patterns (RF + 1 and 6 breaths per minute), which we attribute to the α-wave and parasympathetic-BRS pathway; (c) during slow-paced breathing, cardiorespiratory coupling predominantly favors the respiration-to-heart direction, with the RF stage eliciting the most significant response, while brain-cardiopulmonary information transfer increases across all tasks. These findings offer valuable insights into the impact of RFB on the cardiovascular, respiratory, and central nervous systems, potentially laying the groundwork for future research to optimize respiratory training protocols and improve health outcomes.

Autistic adults experience greater rates of anxiety and depression compared to the general population. Compassion-focused therapy interventions, aimed at promoting self-compassion capabilities, have shown efficacy in improving mental health outcomes in autistic and non-autistic samples suffering from self-criticism that contribute to difficulties in emotion regulation. We explored the experiences of autistic adults during a brief one-week online self-compassion exercise to evaluate it’s feasibility and acceptability through self-report, experience sampling, and parasympathetic activity measured via HRV. Pre- to post-intervention comparisons showed significant improvement in trait self-compassion and fears of self-compassion, but this did not extend to acute measures of psychological distress (depression, anxiety, and stress) nor difficulties in emotion regulation. HRV measures displayed significant increases during self-compassionate practice, although there were no significant changes in physiological reactivity pre- to post-intervention. Experience sampling measures found that whether participants acted on opportunities to be self-compassionate was predictive of concurrent evaluations of affective system activation, whereby acting self-compassionately was associated with greater reported activation of the soothing affective system. Together, our findings support the use of multimodal approaches to investigating the accessibility and efficacy of compassion-focused approaches to resolving emotional difficulties experienced by autistic adults.

Brainwave Entrainment (BWE) is a noninvasive method of neuromodulation based on the principle that auditory or visual stimulation at a specific frequency can lead the brain’s electrocortical activity to oscillate at the frequency of the external signal or its multiples. This phenomenon could be used to alter physiological and psychological states. Therefore, we conducted an integrative review to answer the question: “What are the observed benefits of BWE on human health and well-being?” We searched for studies published in the last ten years in the Directory of Open Access Journals (DOAJ), EMBASE, Virtual Health Library (BVS), PubMed, SciELO, and Cochrane Library databases in April 2024. Searches were conducted in English, Portuguese, and Spanish. A total of 84 studies were included in our review. Studies showed improvements in various conditions, such as pain, sleep disturbances, mood disorders, cognition, and neurodegenerative disorders. In conclusion, our findings align with previous reviews and underscore the need for further research on BWE, particularly with larger sample sizes, robust control groups, and randomized clinical trial designs. Nevertheless, BWE demonstrates promising therapeutic potential and may support the management of various health conditions, enhancing individuals' quality of life.

The EEG theta band displays distinct roles in resting and task states. Low resting theta and transient increases in frontal-midline (fm) theta power during tasks are associated with better cognitive control, such as error monitoring. ADHD can disrupt this balance, resulting in high resting theta linked to drowsiness and low fm-theta activity associated with reduced cognitive abilities. Theta/beta ratio (TBR) neurofeedback aims to normalize resting state activity by downregulating theta, which could potentially unfavorably affect task-related fm-theta. This study examines the TBR neurofeedback’s impact on both resting and fm-theta activity, hypothesizing that remission depends on these effects. We analyzed data from a multi-center, double-blind randomized controlled trial with 142 children with ADHD and high TBR (ICAN study). Participants were randomized into experimental or sham NF groups. EEG measurements were taken at rest and during an Oddball task before and after neurofeedback, assessing global electrodes for resting theta and fm electrodes during error dynamics. Post-intervention changes were calculated as differences, and ANOVAs were conducted on GROUP, REMISSION, and CONDITION variables. Final analysis included fewer participants for all analyses. Resting state analysis showed no significant effects on global or fm-theta after TBR neurofeedback. Error dynamics analysis was inconclusive for global and fm-theta in both remitters and non-remitters. Results suggest that the current TBR neurofeedback protocol did not reduce aberrant resting state theta, and emphasize the need for refined protocols targeting specific theta-band networks to reduce resting-state theta without affecting fm-theta related to cognitive control.

Recovery is a critical factor in athletic performance, and accelerating this process is essential to enable athletes to perform more effectively in both training load and competitive performance. After exercise, immediate recovery is potentially helpful for investigating autonomic activity levels, as they are definable with heart rate variability (HRV). The purpose of this study was to examine the effect of ten sessions of HRV-Biofeedback (HRV-BF) training on recovery process parameters after the aerobic performance. In this study, twenty-four soccer players aged 18–24 volunteered to participate. The athletes who met the research criteria were divided into an experimental group (n = 12) and a control group (n = 12). Each participant’s height, weight, BMI, body fat percentage, and aerobic capacity were measured before and after the 10-session intervention. The experimental group participated in a 10-session HRV-BF training and soccer training program, while the control group only participated in a 10-session soccer training program. Aerobic capacity tests were then applied again to experimental and control group participants. The effect of biofeedback on the three HRV parameters during the 5-minute acute recovery period after the test was investigated. The results showed that regularly applied HRV-BF training can significantly shorten the HRV recovery parameter after exercise. Specifically, the athletes who performed HRV-BF training demonstrated faster cardiovascular recovery after aerobic exercise. This suggests that implementing HRV-BF training for athletes can significantly accelerate their recovery processes during and after competitions. Given recent technological advancements, it is promising to consider adding HRV-BF training to stress management interventions, particularly in relation to physiological stress indicators.

Hypnotherapy is increasingly recognized as an effective treatment option for a wide range of psychological conditions and the psychological elements of physiologic health concerns. Despite its growing use, the mechanisms underlying hypnotherapy's therapeutic benefits remain unknown. Heart rate variability (HRV), a non-invasive biomarker of autonomic nervous system (ANS) activity and other processes relevant to the psychophysiological stress response, has been used to study the physiological effects of hypnosis. HRV is associated with adaptability to stress and overall mental and physical health. We review how HRV changes during hypnosis treatment and propose mechanisms by which hypnotherapy influences the stress response and psychological flexibility and improves wellbeing. Additionally, we highlight the use of HRV biofeedback as an adjunct to hypnotherapy and psychotherapy and illustrate its potential to enhance therapeutic outcomes. To showcase practical applications, we present a case study of hypnotherapy’s impact on HRV in the treatment of hot flashes in post-menopausal women. We conclude by calling for further empirical research, particularly randomized controlled trials, to solidify the integration of HRV metrics in hypnotherapy practice. Understanding the interaction between hypnotherapy and HRV will support more targeted and effective interventions, benefiting both clinicians and patients.

Hormonal shifts during the menstrual cycle (MC) cause autonomic imbalances and psycho-physiological distress in eumenorrheic females. This present study reveals that yoga proactively improves the overall psychophysiological health and wellness in eumenorrheic female college students during different phases of MC. Healthy eumenorrheic female college students (M_age= 20.11 ± 5.39 years, n = 82) were randomized to a control and yoga group (n = 41). A well-conceptualized yoga module (CYM) for 5 days/week for 3 months (1 h daily in the morning) was practiced by the yoga group volunteers. Intra and intergroup comparisons were performed for the estimation of mindfulness awareness scale (MAAS), menstrual distress questionnaire (MDQ), cardiometabolic risk factors, heart rate variability (HRV), and endurance fitness during the luteal (LP) and follicular (FP) phases. Psychophysiological discomforts before CYM practice were mostly observed during LP compared to FP due to significant changes in mindfulness, pain, concentration, autonomic reactivity, negative affect, double product (DoP), rate pressure product (RPP), and HRV values. CYM practice influenced HRV parameters for an increase in parasympathetic activity and a decrease in sympathetic balance for better cardiac-autonomic functioning, with significant improvement in maximal oxygen consumption (VO_2max) and physical work capacity (PWC₁₇₀). Accordingly, MAAS and MDQ scores also improved significantly after yogic practice. The intra-group and inter-group significant improvements in psychophysiological parameters through CYM practice are relevant in eumenorrheic females to perform effectively throughout their MC period, by improving MC distress and sympathovagal (LF/HF) balance.

Biofeedback combined with psychotherapy has been recognized as a potential treatment for patients with functional constipation, anxiety and depression disorder. To validate the therapeutic effect of the biofeedback therapy, 120 patients with a clear diagnosis of functional constipation combined with anxiety and depression disorder were recruited, and then randomly divided into the control group (patients received gastrointestinal medication and anti-anxiety and depression medication) and the treatment group (patients received combined biofeedback and psychotherapy on the basis of the control group’s treatment program). The treatment group was treated with biofeedback exercise twice a day for 7 days, supplemented with psychotherapy for a period of 2 months (half-month intervals for one time). Intestinal medications in the treatment group were stopped after one month of treatment. While for the control group, patients were maintained with gastrointestinal motivational drugs, probiotics, anti-anxiety and depression medications. Both groups reduced the dosage of anxiolytics and depressants after 3 months. The control and the treatment group were both effective and the latter had a more significant effect compared to the former. Moreover, the anxiety/depression symptom for patients in the treatment group was significantly milder than those in the control group. Notably, compared with pre-treatment symptoms, the treatment group showed a significant reduction in Pittsburgh sleep quality index (PSQI) scores in the sixth month (F = 0.008, P = 0.008). In summary, biofeedback combined with psychotherapy may improve relieve constipation patients’ clinical symptoms, anxiety/depression state and sleep quality. The treatment is durable, safe, and easy to implement, so it is suitable for widely used.

The rapid progress of commercial virtual reality (VR) technology, open access to VR development software as well as open-source instructions for creating brain-VR interfaces have increased the number of VR-based neurofeedback (NF) training studies. Controlling a VR environment with brain signals has potential advantages for NF applications. More entertaining, multimodal and adaptive virtual feedback modalities might positively affect subjective user experience and could consequently enhance NF training performance and outcome. Nevertheless, there are certain pitfalls and contraindications that make VR-based NF not suitable for everyone. In the present review, we summarize applications of VR-based NF and discuss positive effects of VR-based NF training as well as contraindications such as cybersickness in VR or age- and sex-related differences. The existing literature implies that VR-based feedback is a promising tool for the improvement of NF training performance. Users generally rate VR-based feedback more positively than traditional 2D feedback, albeit to draw meaningful conclusions and to rule out adverse effects of VR, more research on this topic is necessary. The pace in the development of brain-VR synchronization furthermore necessitates ethical considerations on these technologies.