Applied Psychophysiology and Biofeedback最新文献

Autism Spectrum Disorder (ASD) symptoms have been proposed to be linked to Autonomic Nervous System (ANS) atypical functioning, in particular sympathetic hyper-arousal and parasympathetic under-activation. The objective of this study was to characterize autonomic functioning at rest in autistic and neurotypical children and adults. To characterize several aspects of autonomic functioning, we recorded simultaneously pupil diameter, heart rate and electrodermal activity during 5 min of rest in 44 children (6–12 years old, 22 autistic) and 42 adults (19–52 years old, 21 autistic). Several parameters allowed to characterize tonic and phasic indices of sympathetic and parasympathetic systems at rest. Autistic children exhibited the expected pattern of parasympathetic under-activation at rest compared to their typically developing (TD) peers, and with a tendency for a higher phasic sympathetic activity. Adults exhibited a reverse autonomic pattern, with autistic individuals showing higher sympathetic tonus and lower sympathetic phasic activity than their TD peers. In conclusion, we observed an autonomic disequilibrium at rest both in autistic children and adults, but with opposite patterns that could reflect adaptive compensation mechanisms during maturation. This disequilibrium in autistic children would switch from excessive phasic components to excessive tonic components in adults, possibly subtended by an atypical locus coeruleus functioning.

The present article examines how physiological systems impact on affect regulation, social engagement, and cognitive flexibility, three critical factors in psychotherapeutic success. The vagal system, associated with parasympathetic nervous activity and heart rate variability, provides an integration of brain, heart, gut, affective systems, cognitive performance, and social engagement. The author presents Stephen Porges’ polyvagal theory, Julian Thayer’s neurovisceral integration model, Kerstin Uvnas-Moberg’s oxytocin/hormonal model, and Paul Gilbert’s compassion focused therapy, as models for understanding the impact of vagal function and parasympathetic nervous activation on affect, social behavior, and cognition. The article proposes that direct heart rate variability training, along with other practices that increase vagal activity, can prepare patients for psychotherapy, and contribute to progress in psychotherapy. The emphasis is on the reciprocal influences among vagal activity, prefrontal cortical circuits, affect regulation, caring, and thinking.

Men and women have been shown to exhibit different patterns of cardiovascular response to stress, with men commonly exhibiting greater blood pressure reactions than women and women exhibiting greater heart rate (HR) reactions than men. To examine whether this observed difference between sexes is influenced by one’s gender role as well as gender role-related task characteristics, 48 young men and 48 young women were selected to complete an interpersonal interaction in two-person dyads, with traditional masculine men paired with traditional feminine women and androgynous men paired with androgynous women. Two aspects of the interpersonal interaction were manipulated: Agency (degree of challenge; High versus Low) and Communion (degree of agreement; Agree versus Disagree). HR and systolic and diastolic blood pressure (SBP and DBP) were measured during a resting, preparation, and interaction period. Participants also completed questionnaires assessing state anger and task appraisals. Results from a dyadic linear mixed model analysis revealed that traditional feminine women exhibited significantly higher HR during the interaction than traditional men, especially during the listening phases of the task. Participants with traditional gender roles exhibited higher SBP reactions to the listening phases of the task than participants with androgynous gender roles regardless of their sex. No effects for gender-relevant task characteristics were observed. The results of this study suggest that the gender role of participants is important to consider when designing studies exploring sex differences in response to interpersonal challenges.

Heart rate variability biofeedback (HRVB) is a bio-behavioral intervention applied to patients with chronic obstructive pulmonary disease (COPD), and improves their autonomic activation and pulmonary function. This study explored the effects of HRVB on self-efficacy, quality of life, depression, anxiety, and heart rate variability (HRV) indices under the Six-Minute Walking Test (6MWT) in patients with COPD. The study hypothesizes that HRVB can improve self-efficacy and quality of life, reduce depression and anxiety, and decrease HRV reactivity while enhancing HRV recovery during the 6MWT. A total of 53 patients with COPD were assigned to either an HRVB group (n = 26) or a control group (n = 27), both received standard medical care. The HRVB group also participated in one hour weekly for six weeks. All participants completed assessments using the COPD Self-Efficacy Scale, St. George’s Respiratory Questionnaire, Beck Depression Inventory-II, and Beck Anxiety Inventory pre-test and post-test. The 6MWT was administered to measure HRV during baseline, walking, and recovery stages. Significant improvements in self-efficacy and quality of life for the HRVB group, with a significant increase in post-test compared to pre-test and the control group. However, there were no significant differences in changes in depression and anxiety between the two groups. Additionally, the HRVB group exhibited a significant decrease in HRV reactivity and increased HRV recovery at the post-test compared to the pre-test. These findings indicated that HRVB effectively enhances self-efficacy and quality of life in patients with COPD while improving autonomic function. Therefore, HRVB could be a valuable component of pulmonary rehabilitation for patients with COPD.

Generalised anxiety disorder (GAD) is associated with cognitive and physiological symptoms including uncontrollable worry, inhibitory control deficits, and low heart rate variability (HRV). Literature linking HRV and inhibition in GAD is predominantly correlational. The present experiment investigated whether HRV has a causal role in maintaining inhibitory control. Participants (N = 135, 111 female) aged 18–37 reporting high levels of symptoms associated with GAD (GAD-7 scores ≥ 10; Penn State Worry Questionnaire scores ≥ 56) were assigned to an experimental or active control condition and completed baseline measures of HRV, respiration rate, and inhibitory control. The experimental condition completed resonance frequency breathing (RFB) training, and the control condition practiced breathing at their mean breathing rate before repeating the inhibitory control assessment. Participants also completed the breathing training before a behavioural worry task. The experimental condition was predicted to show increased HRV, alongside improved inhibitory control and better ability to stop worrying as compared to the control condition. HRV increased during the experimental condition, as compared to the control condition. However, there were no significant effects of RFB on inhibitory control or worry, or on HRV during the inhibitory control tasks. In conclusion, RFB can increase HRV in high GAD scorers, but further research is required to determine whether there is a relationship between increased HRV and symptoms of GAD in a single session experiment.

Tinnitus, a distressing condition, significantly impacts psycho-social functioning. While medical interventions have been the norm for treating tinnitus, few studies have explored the efficacy of psychological treatments and their enduring effects. This study aims to evaluate the effectiveness of a brief biofeedback training program in alleviating perceived tinnitus handicap severity over a 3-month follow-up period. Engaging 431 tinnitus outpatients from a medical center, the study allocated the control group to treatment as usual, involving monthly visits to an otolaryngologist and specific pharmacological interventions. Concurrently, the experimental group participated in a brief biofeedback training, using Procomp Infinity by Thought Technology Ltd., an eight-channel computer-operated encoder, integrated with breathing and relaxation exercises. No biofeedback booster sessions were provided to the experimental group during the 3-month follow-up period. Changes in tinnitus severity were assessed using the Tinnitus Handicap Inventory (THI). The analysis, conducted via ANCOVA, demonstrated that biofeedback, integrated with relaxation training and breathing exercises, had a positive impact on both the follow-up THI total score and its three sub-scales (Functional, Emotional, Catastrophic). Notably, the experimental group displayed reduced psycho-physiological parameters in all aspects compared to their baseline measurements at 3-month follow-up. This study’s findings underline the effectiveness of non-pharmacological intervention in treating tinnitus. It had a positive impact on the emotional, functional, and physical dimensions of daily life affected by tinnitus.

To evaluate the efficacy of listening to music in alleviating mental fatigue among healthy participants and to explore the neural evidence for this phenomenon via electroencephalography (EEG). Methods: A total of 30 participants were recruited and randomly assigned to either the music group or the control group. Mental fatigue was induced in both groups using a 30-minute Stroop task. Following this task, the music group listened to relaxing music for 20 min, whereas the control group sat quietly for the same duration. Measurements were taken at three time points: before the Stroop task, immediately after the Stroop task, and after the 20-minute intervention period. Visual analogue scale (VAS) scores and 3-minute resting-state EEG signals were collected at each time point. Results: The data indicated that listening to music significantly reduced mental fatigue. VAS scores decreased more in the music group than in the control group (P = 0.031). The EEG iAPF showed significant recovery in the music group (P < 0.0001). Delta power in the frontal region decreased significantly postintervention in the music group (P = 0.011). Theta and alpha power also decreased significantly in the music group across multiple brain regions (all Ps < 0.0076), with no significant changes observed in beta power. Conclusion: These findings highlight the potential of listening to relaxing music as a noninvasive and enjoyable intervention for mitigating the effects of mental fatigue. Moreover, iAPF, theta, and alpha power can serve as reliable biomarkers for assessing mental fatigue and the restorative effects of interventions such as music.

Square and 4–7-8 breathing are popularly promoted by psychotherapists but have little empirical support. We hypothesized that breathing at 6 breaths per minute (bpm) would improve HRV, reduce blood pressure, and improve mood more than either square or 4–7-8 breathing. We also hypothesized square and 4–7-8 breathing would increase end-tidal CO₂ (PETCO₂). Eighty-four college students (60% female) had HRV measured at baseline and during 1) square breathing, 2) 4–7-8 breathing, 3) 6 bpm with a 4:6 inhale-to-exhale ratio, and 4) 6 bpm with a 5:5 ratio. We used a 3-lead electrocardiogram to measure HRV and a capnometer to measure PETCO₂. We measured mood using the Scale of Positive and Negative Experience (SPANE) after each breathing condition. We used a repeated measures mixed effects model to examine the effects of each breathing technique on HRV, blood pressure, mood, and PETCO₂ levels. Breathing at 6 bpm increased HRV measures more than square or 4–7-8 breathing with small to medium effects. None of the breathing conditions resulted in meaningful changes in blood pressure or mood. Unexpectedly, breathing at 6 bpm led to mild over-breathing. While various breathing techniques are used in psychotherapy, their relative efficacy remains unclear. This study found that breathing at 6 bpm is likely more effective at increasing HRV than square or 4–7-8 breathing, albeit with a higher risk of over-breathing. Future studies could examine whether these effects hold over multiple weeks of breathing practice and attend to the effects of different breathing techniques on CO₂ levels.

Exposure therapy has been shown to be useful for the treatment of anxiety disorders. However, there are individual differences in the extent to which this intervention is effective in reducing symptoms, and a substantial number of patients may experience a return of fear (ROF). The factors associated with successful therapy outcomes are an important topic of investigation as these factors might influence the nature of the interventions as well as enhance our understanding of the process associated with the disorder and its treatment. Here, we investigated the effect of resting heart rate variability (HRV) on ROF following exposure therapy in social phobics. In particular, using path modeling, we assessed the hypothesis that resting HRV prospectively predicts inhibitory learning, which, in turn, prospectively predicts ROF at follow-up. Forty adult participants (60% female) diagnosed with Social Anxiety Disorder were assigned to a single massed exposure therapy session. Self-reported behavioral and physiological responses were recorded pre-treatment, immediately following treatment, and at one-month follow-up. The Personalized Implicit Association Task (PIAT) was used as an implicit measure of inhibitory learning, and HF-HRV was taken as a measure of vagal activity. Results revealed that those with high pre-treatment HRV reported less negative implicit attitude towards public speaking after exposure (b = -0.044, p =.047) and showed reduced residual symptoms one month after treatment. (b = 2.247, p =.013). Taken together these results support exposure therapy models that emphasize the importance of inhibitory learning in extinction and are consistent with research linking HRV to inhibition.