The impact of sleep education, light intervention and relaxation on sleep and mood in the elderly.

Sleep and light education (SLE) combined with relaxation is a potential method of addressing sleep and affective problems in older people. 47 participants took part in a four-week sleep education program. SLE was conducted once a week for 60-90 minutes. Participants were instructed on sleep and light hygiene, sleep processes, and practiced relaxation techniques. Participants were wearing actigraphs for 6 weeks, completed daily sleep diaries, and wore blue light-blocking glasses 120 minutes before bedtime. Measures included scores of the Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale (ESS), Insomnia Severity Index (ISS), Beck Depression Inventory-II (BDI-II), State-Trait Anxiety Inventory (STAI) and actigraphy measurements of sleep latency, sleep efficiency, and sleep fragmentation. Sleep quality increased after SLE based on the subjective assessment and in the objective measurement with actigraphy. PSQI scores were statistically reduced indicating better sleep. Scores after the intervention significantly decreased in ESS and ISS. Sleep latency significantly decreased, whereas sleep efficiency and fragmentation index (%), did not improve. Mood significantly improved after SLE, with lower scores on the BDI-II and STAI. SLE combined with relaxation proved to be an effective method to reduce sleep problems and the incidence of depressive and anxiety symptoms.

Relaxation Effect of Nature Sound Exposure on Gambling Disorder Patients: A Crossover Study.

Objective: Gambling disorder (GD) has been associated with economic, social, mental, and physical problems. Alternative leisure activities or stress-relieving activities have been adopted as part of GD treatment. Moreover, it has been proven that activities utilizing the natural environment, such as shinrin-yoku, have a relaxing effect on healthy people. In this study, we examined the physiological and psychological responses of patients with GD to determine whether nature therapy could reduce their stress responses. Design: This study included 22 Japanese male participants who were found to be pathological gamblers, with a South Oaks Gambling Screen score of ≤5. We exposed the participants to the digital nature sounds of insects and city sounds of a scramble intersection. The nature and city sounds were presented in a counterbalanced order. Outcome measures: A two-channel near-infrared spectroscopy system was used to measure the changes in oxyhemoglobin (oxy-Hb) concentrations in the bilateral prefrontal cortex. The heart rate variability was measured to evaluate the autonomic nervous activity. Subjective evaluation was performed using the modified version of the semantic differential method and the Profiles of Mood States, Second Edition (POMS2). Results: The oxy-Hb level in the bilateral prefrontal cortex significantly decreased. No significant difference in the high-frequency (HF) and low-frequency/HF ratio was observed. The subjective evaluation indicated that the participants experienced increased comfort and relaxation and had more natural feelings. Nature sounds significantly decreased the POMS2 negative emotion subscale and total mood disturbance scores and increased the positive emotion subscale scores. Nature-based stimulus exposure induces physiological relaxation and other positive effects among individuals even with GD. Conclusion: Exposure to nature-based sounds induces physiological relaxation and other positive responses among individuals with GD. In patients with GD, nature sounds produce the same relaxation response as in healthy individuals. (Umin.ac.jp under registration number: UMIN000042368).

Seasonal Differences in Physiological Responses to Walking in Urban Parks.

The aim of the current study was to assess seasonal differences in physiological responses to walking in urban parks. In total, 51 Japanese male university students participated in this research. During each season, the participants walked for 15 min in an urban park and a city area, which was used as the control site. Heart-rate variability and heart rate were used as physiological indicators. The mean values of each indicator in a comparison between walking in an urban park and a city area were compared according to each season. In addition, to show the physiological effect of walking in an urban park, differences (between walking in an urban park and walking in a city area) were calculated. Then, differences according to each season were compared. The results showed that the participants had increased parasympathetic nervous system activity in all seasons except summer. Moreover, they had decreased sympathetic nervous system activity in spring and fall and decreased heart rate in all seasons. Compared with walking in urban parks in summer, walking in urban parks in spring, fall, and winter had a greater relaxation effect on parasympathetic and sympathetic nervous system activities; hence, the physiological effects of walking in urban parks vary based on season.

Acute relaxation during pregnancy leads to a reduction in maternal electrodermal activity and self-reported stress levels.

BACKGROUND: Prenatal maternal stress can have adverse effects on birth outcomes and fetal development. Relaxation techniques have been examined as potential countermeasures. This study investigates different relaxation techniques and their effect on self-reported stress levels and physiological stress levels in pregnant women. METHODS: In this cross-sectional study, 38 pregnant women in their 30th to 40th gestational week were assigned to one of three, 20-min lasting relaxation groups: listening to music (N = 12), following a guided imagery (N = 12) or resting (N = 12). The intervention, i.e., acute relaxation (music, guided imagery or resting) took place once for each study participant. Study inclusion criteria were age over 18 years, German speaking, singleton and uncomplicated pregnancy during the 30th and 40th week of gestation. The stress levels were determined during the study. Current stress level during the study was assessed by a visual analogue scale. Chronic stress levels were assessed by the Trier Inventory of Chronic Stress and the Pregnancy Distress questionnaire. Multivariate analyses of covariance were performed and dependent measures included stress levels as well as physiological measures, i.e., cardiovascular activity (electrocardiogram) and skin conductance levels. RESULTS: All three forms of relaxation led to reduced maternal stress which manifested itself in significantly decreased skin conductance, F(3,94) = 18.011, p = .001, ηp2 = .365, and subjective stress levels after the interventions with no significant group difference. Post-intervention stress ratings were further affected by gestational age, with less subjective relaxation in women later in gestation, F (1, 34)=4.971, p = .032, ηp2 = .128. CONCLUSION: Independent of relaxation technique, single, 20-min relaxation intervention (music, guided imagery or resting) can significantly reduce maternal stress. Notably, women at an earlier stage in their pregnancy reported higher relaxation after the intervention than women later in gestation. Hence, gestational age may influence perceived stress levels and should be considered when evaluating relaxation or stress management interventions during pregnancy. TRIAL REGISTRATION: Not applicable.

Relaxation capacity of cartilage is a critical factor in rate- and integrity-dependent fracture.

Articular cartilage heals poorly but experiences mechanically induced damage across a broad range of loading rates and matrix integrity. Because loading rates and matrix integrity affect cartilage mechanical responses due to poroviscoelastic relaxation mechanisms, their effects on cartilage failure are important for assessing and preventing failure. This paper investigated rate- and integrity-dependent crack nucleation in cartilage from pre- to post-relaxation timescales. Rate-dependent crack nucleation and relaxation responses were obtained as a function of matrix integrity through microindentation. Total work for crack nucleation increased with decreased matrix integrity, and with decreased loading rates. Critical energy release rate of intact cartilage was estimated as 2.39 ± 1.39 to 2.48 ± 1.26 kJ m-2 in a pre-relaxation timescale. These findings showed that crack nucleation is delayed when cartilage can accommodate localized loading through poroviscoelastic relaxation mechanisms before fracture at a given loading rate and integrity state.

Linear and non linear measures of pupil size as a function of hypnotizability.

Higher arousal and cortical excitability have been observed in high hypnotizable individuals (highs) with respect to low hypnotizables (lows), which may be due to differences in the activation of ascending activating systems. The present study investigated the possible hypnotizability-related difference in the cortical noradrenergic tone sustained by the activity of the Locus Coeruleus which is strongly related to pupil size. This was measured during relaxation in three groups of participants-highs (N = 15), lows (N = 15) and medium hypnotizable individuals (mediums, N = 11)-in the time and frequency domains and through the Recurrence Quantification Analysis. ECG and Skin Conductace (SC) were monitored to extract autonomic indices of relaxation (heart interbeats intervals, parasympathetic component of heart rate variability (RMSSD) and tonic SC (MeanTonicSC). Most variables indicated that participants relaxed throughout the session. Pupil features did not show significant differences between highs, mediums and lows, except for the spectral Band Median Frequency which was higher in mediums than in lows and highs at the beginning, but not at the end of the session.Thus, the present findings of pupil size cannot account for the differences in arousal and motor cortex excitability observed between highs and lows in resting conditions.

Comparing Relaxation Versus Mastery Microbreak Activity: A Within-Task Recovery Perspective.

Recovery from work is generally thought to occur outside of the workplace. However, employees may also have the opportunity to recover within the work day via microbreaks during demanding work tasks. Two major strategies for mitigating fatigue include psychological detachment (i.e., mentally disengaging) and replenishing motivational incentives via positive affect. This study examined whether 40-s "microbreaks" improve work recovery and to what extent different microbreak content (mastery vs. relaxation activities) boost performance. Using an experimental study, we randomly assigned individuals to receive a relaxation microbreak (n = 59), a mastery microbreak (n = 68), or no break (n = 72) in the middle of a monotonous work task and assessed work performance. Microbreaks improved task performance and within-task recovery, but only for psychological detachment (not positive affect). Mastery breaks also resulted in more psychological detachment than relaxation breaks, but this increased detachment did not explain performance differences between break types. These results build on existing recovery theories by further demonstrating within-task recovery and provide practical implications for organizations to consider the importance of microbreaks.

The Effect of Natural Ocean Sound Exposure and Ocean-Side Relaxation on Chronic Tinnitus Patients: A Pilot Study in Korea.

Sound therapy is a treatment modality for tinnitus patients by increasing the background neuronal activity in the auditory system and inducing relative alleviation of the tinnitus. This study was performed to evaluate the efficacy of natural ocean sound exposure and ocean-side relaxation in chronic tinnitus patients. We prospectively enrolled all 18 chronic tinnitus patients (≥6 months) from July to November 2018. All patients completed 90 hours of our programs. The improvement in their subjective tinnitus severity, moods, the quality of life, and sleep was serially assessed using several questionnaires at baseline, immediately, and 1 month after the program. Changes in serum stress hormone levels of the patients were also compared between the baseline and immediately after the program. Average total Tinnitus Handicap Questionnaire score and factor 2 (hearing difficulty related to tinnitus) score significantly improved over time (P = .024 and P = .002). Patient's serum cortisol and epinephrine level did not show significant decrease, and serum norepinephrine and serotonin level significantly increased immediately after our program (P < .001 and P < .001). Natural ocean sound exposure and ocean-side relaxation for short-term period has a potential efficacy on chronic tinnitus patients.

Infants relax in response to unfamiliar foreign lullabies.

Music is characterized by acoustic forms that are predictive of its behavioural functions. For example, adult listeners accurately identify unfamiliar lullabies as infant-directed on the basis of their musical features alone. This property could reflect a function of listeners' experiences, the basic design of the human mind, or both. Here, we show that US infants (N = 144) relax in response to eight unfamiliar foreign lullabies, relative to matched non-lullaby songs from other foreign societies, as indexed by heart rate, pupillometry and electrodermal activity. They do so consistently throughout the first year of life, suggesting that the response is not a function of their musical experiences, which are limited relative to those of adults. The infants' parents overwhelmingly chose lullabies as the songs that they would use to calm their fussy infant, despite their unfamiliarity. Together, these findings suggest that infants may be predisposed to respond to common features of lullabies found in different cultures.

Effect on autonomic nervous activity of applying hot towels for 10 s to the back during bed baths.

BACKGROUND: Bed baths are a daily nursing activity to maintain patients' hygiene. Those may provide not only comfort but also relaxation. Notably, applying a hot towel to the skin for 10 s (AHT10s) during bed baths helped to reduce the risk of skin tears and provided comfort and warmth in previous studies. However, it is still unclear whether autonomic nervous system is affected by bed baths. Thus, this study investigated the effect on the autonomic nervous activity of applying hot towels for 10 s to the back during bed baths. METHODS: This crossover study had 50 participants (25 men and women each; average age 22.2 ± 1.6 years; average body mass index 21.4 ± 2.2 kg/m2) who took bed baths with and without (control condition: CON) AHT10s on their back. Skin temperature, heart rate variability (HRV), and blood pressure (BP) were measured. Subjective evaluations and the State-Trait Anxiety Inventory in Japanese were also performed. RESULTS: A significant interaction of time and bed bath type on skin surface temperature was observed (p < .001). Regarding the means of skin surface temperature at each measurement time point, those for AHT10s were significantly higher than those for CON. Although the total state-anxiety score significantly decreased in both the bed bath types after intervention, the mean values of comfort and warmth were higher for bed baths with AHT10s than for CON (p < .05) during bed baths; AHT10s was significantly higher in warmth than CON after 15 min (p = .032). The interaction and main effects of time on HRV and BP and that of bed bath type were not significant. CONCLUSION: Bed baths that involved AHT10s caused participants to maintain a higher skin temperature and warmer feeling than under the wiping-only condition; they also provided comfort during the interventions. However, the bed baths with AHT10s did not allow participants to reach a relaxed state; moreover, there was no change in autonomic nerve activity. This may be due to participants' increased anxiety from skin exposure and the intervention being limited to one part of the body.

An experimental examination of worry and relaxation on cardiovascular, endocrine, and inflammatory processes.

BACKGROUND: Worry increases risk for long-term health issues by prolonging the physiological stress response. In contrast, relaxation may ameliorate the psychological and physiological burden resulting from worry. This study examined the impact of experimentally induced worry and relaxation on cortisol, heart rate variability (HRV), and inflammation. METHOD: Participants (N = 80) completed both a worry and relaxation induction (presented in a fixed order) while HRV was collected continuously. Three blood samples were taken (at baseline, after the worry induction, and after the relaxation induction) to measure IL-6, IFN-γ, TNF-α and serum cortisol. RESULTS: There were significant changes in IL-6 (p < 0.001), IFN-γ (p < 0.01), HRV (p < .001), and cortisol (p <  .001) but not in TNF-α (p = 0.65) across conditions. HRV decreased significantly from baseline to worry and then increased following relaxation. IL-6 was higher during relaxation compared to worry and baseline. Cortisol decreased significantly across conditions. Several patterns of covariance between inflammation and HRV and/or cortisol also emerged. CONCLUSIONS: These findings offer novel insight into how worry influences the immune system and emphasize the utility of a multi-methods approach to understanding the impact of worry on physical health.

El fenómeno de flexión-relajación lumbar como test diagnóstico en la evaluación de un déficit lumbar. Sensibilidad y especificidad / The lumbar flexion-relaxation phenomen as a diagnostic test in assessment of lumbar impairment. Sensitivity and specificity

OBJETIVO: Definir el papel del fenómeno de flexión-relajación (FR), valorado mediante ratios (FRR), como test diagnóstico para definir una situación de déficit (impairment) en pacientes con dolor lumbar crónico (DLC). MATERIAL Y MÉTODO: La muestra del estudio consta de 180 sujetos, 16 voluntarios sanos y 164 pacientes en situación de incapacidad laboral por DLC, que fueron remitidos consecutivamente desde enero de 2012 a diciembre de 2017 para su valoración al laboratorio de biomecánica de una mutua de accidentes de trabajo. Las evaluaciones consistieron en un test de dinamometría isométrica, una prueba cinemática y una valoración del fenómeno FR. Se establecieron unos criterios mínimos en la ejecución de los test para ser aceptados como pruebas válidas para el estudio. El estado de déficit lumbar o de recuperación clínica en un paciente se definió a partir de los test de dinamometría y de cinemática. La respuesta FR se valoró con los FRR. Se tomaron un total de 4 ratios diferentes para el análisis con curvas ROC. RESULTADOS: Se obtuvieron 86 pruebas válidas (16 clasificadas como déficit lumbar y 71 como casos recuperados). La mejor ratio obtiene un área bajo la curva ROC de 0,87, una S: 0,84 y una E: 0,87 para identificarlos y un valor predictivo positivo del 97%. CONCLUSIONES: El test FR guarda con las evaluaciones de dinamometría y de cinemática una alta coherencia para objetivar una situación de déficit, siendo este una prueba de fácil ejecución por parte de los pacientes con DLC

OBJECTIVE: To define the role of the flexion-relaxation phenomenon (FRP), assessed through ratios (FRR), as a diagnostic test to define impairment in patients with chronic low back pain (CLBP). MATERIAL AND METHOD: The study sample consisted of 180 participants (16 healthy volunteers and 164 patients on work disability due to CLBP), who were consecutively referred for evaluation at the Biomechanics Laboratory of a workplace accident insurance company from January 2012 to December 2017. The evaluations consisted of an isometric dynamometry test, a kinematic test and assessment of the FRP phenomenon. Minimum criteria were established in the performance of the tests for their acceptance as valid for the study. Lumbar impairment or clinical recovery was defined on the basis of the results of the dynamometry and kinematic tests. The FRP response was assessed with FRRs. A total of 4 different ratios were taken for analysis with ROC curves. RESULTS: A total of 86 valid tests were obtained (16 classified as lumbar impairment and 71 as recovered cases). The best ratio obtained an area under the ROC curve of 0.87, with a sensitivity of 0.84, a specificity of 0.87, and a positive predictive value of 97%. CONCLUSION: The FRP test, along with dynamometry and kinematic evaluations, is effective in identifying lumbar impairment and is the easiest test for patients with CLBP to perform

Effects of Types of Horticultural Activity on the Physical and Mental State of Elderly Individuals.

This study aimed to evaluate the effect of types of horticultural activities among elderly individuals in a senior citizen learning camp. We arranged four horticultural activities: Grass Doll, Kokedama, Rocky Leaf Prints, and Herb Tasting and Smelling. Twenty-seven senior citizens (60 to 76 years) were recruited to participate. We assessed their physiological and mental state before and after the activities by measuring heart rate variability (HRV), pulse rate, blood pressure, salivary amylase activity (SAA), and Profile of Mood States (POMS). Results showed that SAA was significantly lower after the Rocky Leaf Prints, Herb Tasting and Smelling, and Kokedama. Pulse rate had a downward trend after the four horticultural activities. The ratio of low frequency (LF) over high frequency (HF) results showed that the Rocky Leaf Prints had a larger downward trend, followed by Herb Tasting and Smelling. POMS scores indicated significant improvement for Rocky Leaf Prints and Herb Tasting and Smelling. The types including artistic creation and food tasting were promising methods for psychological relaxation, stress reduction, and vigor enhancement for elderly persons. Findings showed that the impact of activities involving contact with plants was more significant in short-term activities. We hope this study can help plan the horticultural activities of the elderly in the future.

Effects of singing bowl exposure on Karolinska sleepiness scale and pupillographic sleepiness test: A randomised crossover study.

BACKGROUND: The aim of this study was to investigate the effects on subjective and objective sleepiness of a stay above a large struck singing bowl compared to a relaxation period in a silent singing bowl. METHODS: Fifty-eight healthy subjects were recruited for the study, 48 participated on two days, one week apart, during the same timeslot. The Karolinska sleepiness scale was used to evaluate current subjective sleepiness, and the relative pupillary unrest index to assess objective sleepiness. In this randomized cross-over study, the intervention consisted of a 20-minute stay in a hammock while the singing bowl, positioned beneath, was struck seven times. The controlled comparator was a 20-minute stay in the same hammock above the singing bowl, but without being struck. After these two interventions subjective and objective sleepiness were re-evaluated. RESULTS: The mean relative pupillary unrest index values after relaxation in the struck and silent singing bowl groups were 0.74 and respectively 0.71 (p = 0.460). The median Karolinska sleepiness scale value after relaxation with the struck singing bowl was 3 compared with 4 (p = 0.041) for the silent singing bowl. DISCUSSION: This study evaluated the influence of a struck singing bowl on sleepiness during daytime. Subjective sleepiness was significantly lower after relaxation above a struck singing bowl. After gender stratification, the difference was still significant in women. Objective sleepiness was not different in both groups. Finally, we can only speculate if women may be more susceptible to subjective improvements in case of sleepiness and show another perception of relaxation in a struck singing bowl compared to men.

The Mechanism of Relaxation by Viewing a Japanese Garden: A Pilot Study.

AIM: To explore people's visual attention and psychological and physiological responses to viewing a Japanese garden (an asymmetrically designed garden) and an herb garden (a symmetrically designed garden). BACKGROUND: There are few studies of eye movements when observing different style gardens, and how they are connected to the interpretation of the space, and physiological and psychological responses. METHOD: Thirty subjects were recruited and their physiological and psychological responses to viewing the garden types were assessed using a heart-rate monitor and questionnaire. Eye movements while viewing projected slide images of the gardens were tracking using an eye-tracking monitor. RESULTS: A significant decrease in heart rate was observed when subjects were viewing the Japanese garden as opposed to viewing the herb garden. Mood was significantly improved in both gardens, but eye-gaze patterns differed. The Japanese garden elicited far more comments about expectations for the coming season; unlike the herb garden, it also induced memories of viewing other landscapes. CONCLUSION: The physiological and psychological responses to viewing gardens differs based on the quality of landscape design and the prior experience of viewers.

High-frequency electrical stimulation of the anterior thalamic nuclei increases vigilance in epilepsy patients during relaxed and drowsy wakefulness.

OBJECTIVE: High-frequency deep brain stimulation (DBS) of anterior thalamic nuclei (ANT) reduces the frequency and intensity of focal and focal to bilateral tonic-clonic epileptic seizures. We investigated the impact of high-frequency ANT-DBS on vigilance in epilepsy patients during relaxed and drowsy wakefulness, to better understand the effects and the mechanisms of action of this intervention in humans. METHODS: Four patients with different structural epileptic pathologies were included in this retrospective case-cohort study. Short- and long-term electroencephalography (EEG) was used to determine states of relaxed or drowsy wakefulness and the vigilance changes during stimulation-on and stimulation-off intervals. RESULTS: In relaxed, wakeful patients with eyes closed, the eyelid artifact rate increased acutely and reproducibly during stimulation-on intervals, suggesting an enhanced vigilance. This effect was accompanied by a slight acceleration of the alpha rhythm. In drowsy patients with eyes closed, stimulation generated acutely and reproducibly alpha rhythms, similar to the paradoxical alpha activation during eyes opening. The occurrence of the alpha rhythms reflected an increase in the vigilance of the drowsy subjects during ANT-DBS. SIGNIFICANCE: This is the first demonstration that ANT-DBS increases the vigilance of wakeful epilepsy patients. Our results deliver circumstantial evidence that high-frequency ANT-DBS activates thalamocortical connections that promote wakefulness.

The Effect of Lotus Position on Dyspnoea Management in Intensive Care Unit.

OBJECTIVE: To determine the effect of lotus position on dyspnea management. METHODS: The case-control study was conducted from June to November 2016 at a training and research hospital in Istanbul, Turkey, and comprised patients with lung disease in an intensive care unit. The patients were divided into an experimental group who were exposed to lotus position for dyspnoea management, while the control group was subjected to Orthopnoeic position. Data was collected using a patient description form, and the Medical Research Council Scale. Respiratory rate, oxygen saturation, heart rate and blood pressure for all subjects were noted. SPSS 22 was used for data analysis. RESULTS: Of the 35 subjects, 17(48.5%) were cases and 18(51.4%) were controls. The overall mean age was 61.48±15.51 years. There was a significant improvement in the intra-group respiratory rate, oxygen saturation, heart rate and systolic blood pressure in both groups (p<0.05). Patients in both groups were similar in their vital signs both before and after the intervention (p>0.05). CONCLUSIONS: Both lotus and Orthopnoeic positions significantly improved dyspnoea-related variables, and lotus position was as effective as Orthopnoeic position.

"Breaking" the Emergency Department: Does the Culture of Emergency Medicine Present a Barrier to Self-Care?

INTRODUCTION: Our goal was to critically examine emergency physician's (EP) beliefs about taking breaks for self-care on shift. Our operational definition of a break for self-care included time not engaging in direct patient care, eating, drinking, using the bathroom, or leaving a clinical area for a mental break. Using focus groups, the study aimed to accomplish the following: 1) identify barriers to why residents and faculty at our academic center may not take breaks in the emergency department; 2) generate hypotheses for empirical testing; and 3) generate solutions to include in a departmental breaks initiative. METHODS: We convened eight focus groups comprised separately of resident and faculty physicians. Group discussion was guided by eight questions representing a priori themes. The groups were recorded for transcription and subjected to a "cut-and-sort" process. Six themes were identified by consensus after independent review by three of the co-authors, which were confirmed by participant validation. RESULTS: We identified six themes that represented the pooled outcomes of both resident and faculty focus groups: 1) Physiological needs affect clinical performance, 2) EPs share beliefs around taking breaks that center on productivity, patient safety and the dichotomy of strength/weakness, 3) when taking breaks EPs fear worst-case scenarios, 4) breaking is a learned skill, 5) culture change is needed to allow EPs to engage in self-care; and 6) a flexible, individualized approach to breaking is necessary. Our central finding was that productivity and patient safety are of key importance to EPs when considering whether to take a break for self-care. We identified a dichotomy with the concept of strength related to productivity/patient safety, and the concept of weakness related to self-care. CONCLUSION: The current practice culture of emergency medicine and the organization of our unique work environment may present barriers to physicians attempting to engage in self-care.

When classical music relaxes the brain: An experimental study using Ultrasound Brain Tissue Pulsatility Imaging.

INTRODUCTION: Recent evidence suggests that biomechanical parameters of the brain, such as Brain Tissue Pulsatility (BTP), could be involved in emotional reactivity. However, no study has investigated the impact of an emotional task on BTP. We used the ultrasound method of Tissue Pulsatility Imaging (TPI) to assess changes in BTP to exciting and relaxing classical music, in a musical perception task, as a validated paradigm to assess emotional reactivity. METHODS: 25 healthy volunteers were exposed via earphones to four 5-minute musical excerpts (two exciting and two relaxing musical excerpts) presented in a randomized order and intersected by 5 silence periods. Measures of BTP, Heart Rate (HR) and Skin Conductance (SC) were collected during the entire task. RESULTS: The BTP significantly decreased with relaxing music compared to silence, and especially with the excerpt 'Entrance of the Shades' by Minkus. The HR and SC, but not Heart Rate Variability, were also decreased with relaxing music. We found no significant effect of exciting music. DISCUSSION: We report, for the first time, that classical relaxing music decreases the amplitude of the brain pulsatile movements related to cerebral blood flow and mechanical properties of the brain parenchyma, which provides further evidence of the involvement of BTP in emotional reactivity. In addition, we validate the use of TPI as a non-invasive, portable and low cost tool for studies in psychophysiology, with the potential to be implemented as a biomarker in musicotherapy trials notably.

Relaxation during the evening and next-morning energy: The role of hassles, uplifts, and heart rate variability during work.

Being able to psychologically relax after work in the evening is important to the day-to-day recovery process and should enable employees to wake up feeling energized for the next workday. Drawing on affective events theory and allostatic load theory, we expected that employees will be able to psychologically relax when they get home from work if during work (a) they experienced less work-related goal-frustration events and more work-related goal-achievement events and (b) if they were adaptively regulating physiological stress arousal (as indexed by heart rate variability). As such, this research considers that work events, as well as a physiological indicator of parasympathetic regulation, can be important antecedents to off-the-job recovery. Over the course of 5 consecutive workdays, 72 employees completed daily surveys (on waking, at work, and in the evening) and wore an ambulatory electrocardiograph to measure their heart rate variability while at work that afternoon. Multilevel mediation analyses revealed support for our hypotheses at the within-person level, except for the role of goal-attainment events. The finding that goal-frustration events and heart rate variability both contribute to evening relaxation, and then indirectly to next-morning energy, provides initial insights on how both mind and body impact off-the-job recovery. (PsycInfo Database Record (c) 2020 APA, all rights reserved).