Relationship between relaxation by guided imagery and performance of working memory

This study tested the hypothesis that relaxation by guided imagery improves working-memory performance of healthy participants. 30 volunteers (both sexes, ages 17-56 years) were randomly assigned to one of three groups and administered the WAIS-III Letter-Number Sequencing Test before and after 10-min. treatment with guided imagery or popular music. The control group received no treatment. Groups' test scores were not different before treatment. The mean increased after relaxation by guided imagery but not after music or no treatment. This result supports the hypothesis that working-memory scores on the test are enhanced by guided imagery and implies that human information processing may be enhanced by prior relaxation.     

A multidimensional scaling analysis of judged similarity of complex forms from two task situations

Ss provided judgments of pairwise stimulus similarities for 21 12-turn random forms in two experimental tasks: a scaling task, involving a variant of the method of graded dichotomies, and a sorting task, which simply required Ss to categorize the forms. The grouped data from both tasks, when analyzed using nonmetric multidimensional scaling techniques, yielded five-dimensional configurations with euclidean distances. The correspondence of these two spaces, assessed using canonical correlations, was extremely good. The psychological dimensions derived from both tasks were related to two sets of physical measures on the forms: the factor space suggested by Brown and Owen and a set of more basic physical measures. Physical cues of greatest importance involved size, dispersion, angularity, and rotation measures. The value of the tasks and the utility of the Brown and Owen measures were discussed.     

Effects of guided imagery with relaxation training on anxiety and quality of life among patients with inflammatory bowel disease

Background: Inflammatory Bowel Disease (IBD) impacts quality of life (QoL). Psychological factors influence the course of the disease and should be targeted for intervention.

Methods: Our study was a prospective, randomised control trial. Fifty-six outpatients were randomly chosen and allocated to a treatment group or a waiting-list control group. Treatment group patients attended three relaxation-training sessions and received an audio disc for home practice. Evaluations performed pre and post-treatment: state anxiety was assessed with the State-Trait Anxiety Inventory, QoL with the IBD Questionnaire. The Visual Analogue Scale assessed pain, depression, stress and mood. Patients completed a symptom monitoring diary. The control group's symptoms were monitored without study-related treatment.

Results: Thirty-nine subjects completed the study and were included in the data analysis. Following the relaxation-training intervention, the treatment group's (n?=?18) measured results showed a statistically significant improvement as compared to the control group (n?=?21) (time by treatment interaction): anxiety levels decreased (p?<?0.01), QoL and mood improved (p?<?0.05), while levels of pain and stress decreased (p?<?0.01).

Conclusions: Findings indicate IBD patients may benefit from relaxation training in their holistic care. New studies as well as further investigation of the subject are warranted.     

The effects of muscle relaxation and stress on the blood pressure levels of normotensives

Shoemaker and Tasto (1975) found that progressive muscle relaxation lowers the blood pressure levels of essential hypertensives to within a normal range under laboratory conditions. As a sequel to this study the effects of muscle relaxation and stress on the blood pressure levels of normotensives were studied. One group was taught relaxation, one group was stressed, one group read, and one group did nothing. Blood pressure measurements taken immediately after the completion of these tasks indicated that muscle relaxation does not lower the blood pressure levels of normotensives but that stress significantly raises both the systolic and diastolic levels.Level of arousal can, at least in one sense, be viewed as occurring on a dimension defined by extreme anxiety at one end and extreme relaxation at the other. Research on the physiological correlates and/or defining properties of arousal has produced inconsistent and equivocal results. Little work has been done relating blood pressure levels to arousal, however. Shoemaker and Tasto (1975) found a consistent and predictable drop in the blood pressure levels of essential hypertensives as a result of progressive muscle relaxation. In their study those subjects with the highest blood pressure levels showed the greatest drop while those with moderately high levels showed moderate drops and those with the lowest levels (yet still above normal) showed the least amount of change. The amount by which blood pressure dropped as a result of progressive relaxation was positively correlated with the pretreatment level of blood pressure. The result of progressive relaxation was to lower blood pressure levels to within a normal range, with all subjects appearing to approach a lower asymptotic level. Because of the consistent picture which began to emerge, the question arose as to whether blood pressure might be a reliable physiological correlate of the relaxation-anxiety dimension.The more specific questions emanating from this issue were: what effect does progressive relaxation have on the blood pressure levels of normotensives; what effect does stress have on the blood pressure levels of normotensives; and, what effect does stress have on the blood pressure levels of essential hypertensives? Since we could not immediately foresee the benefits that would outweigh the potential harm that might arise by placing hypertensives under stress, this study was limited to addressing the first two questions.Since the blood pressure levels of normotensives are probably at an optimal level for the physiological functioning of the organism, lower levels would be physiologically nonadaptive. and thus progressive relaxation should not lower the blood pressure levels of normotensives as it does those of essential hypertensives. On the other hand, if the elevated blood pressure levels of essential hypertensives are at least in part the result of a stress reaction, it would be expected that the blood pressure levels of normotensives might rise under stress conditions.     

Contextual cueing reduces interference from task-irrelevant onset distractors

Three experiments were conducted to examine the interaction of top-down and bottom-up influences on visual search. More specifically, we examined the extent to which stimulus-driven capture of attention by abrupt onset distractors would disrupt the acquisition and expression of memory-based guidance of attention as exemplified by the contextual cueing effect (Chun & Jiang, 1998, 1999). In Experiment 1 onset distractors were introduced at the beginning of practice on the search task. Results indicated that onset distractors and repeated distractor patterns had independent and opposing influences on the efficiency of search. Experiment 2 ruled out an alternative hypothesis concerning the capture of attention by abrupt onsets. In Experiment 3, abrupt onset distractors were introduced following several hundred trials of practice with repeated and new distractor patterns in visual search. In this case contextual cueing observed in the repeated distractor configuration condition partially suppressed the detrimental influence of the abrupt onset distractors on search performance. These data are discussed in terms of the interaction of top-down and bottom-up influences on visual search.     

SwarmSight: Measuring the temporal progression of animal group activity levels from natural-scene and laboratory videos

We describe SwarmSight (available at https://github.com/justasb/SwarmSight), a novel, open-source, Microsoft Windows software tool for quantitative assessment of the temporal progression of animal group activity levels from recorded videos. The tool utilizes a background subtraction machine vision algorithm and provides an activity metric that can be used to quantitatively assess and compare animal group behavior. Here we demonstrate the tool’s utility by analyzing defensive bee behavior as modulated by alarm pheromones, wild-bird feeding onset and interruption, and cockroach nest-finding activity. Although more sophisticated, commercial software packages are available, SwarmSight provides a low-cost, open-source, and easy-to-use alternative that is suitable for a wide range of users, including minimally trained research technicians and behavioral science undergraduate students in classroom laboratory settings.     

A review of the impact of hypnosis,relaxation, guided imagery and individual differences on aspects of immunity and health

This review considers psychological interventions involving relaxation and guided imagery targeting immune functions. The review provides evidence of immune control accompanied by reports of enhanced mood and well-being. Three recent investigations of the author and his colleagues with self-hypnosis training incorporating imagery of the immune system are outlined. In two studies, hypnosis buffered the effects of stress on immune functions in medical students at exam time, and the comparison of self-hypnosis with and without immune imagery confirmed advantages to targeted imagery for both immune function and mood, and importantly, fewer winter viral infections. The implications for health were investigated in a third study in patients with virulent and chronic herpes simplex virus-2 HSV-2). Six weeks of training almost halved recurrence, improved mood and reduced levels of clinical depression and anxiety. Immune functions were up-regulated, notably functional natural killer cell activity to HSV-1. Individual differences in hypnotic susceptibility and absorption have typically been found to predict efficacy. New replicable evidence is reviewed of the importance of cognitive activation, a personality difference whose neurophysiological underpinning is consistent with left hemispheric preferential influences over the immune system. Now that the validation of psychological interventions includes advantages for health, this field of enquiry, which has been characterised by modest, small scale, largely preliminary studies, warrants a greater investment in research.     

Undue game of baseline principles: the physician-patient relationship from a bioethical perspective

This article is inspired by an accident in a hospital where a pregnant woman died on the operating table because her husband was unwilling to sign the operation consent form. What's lurking behind this tragedy is the crisis of faith between doctors and patients in China. The crisis is a product of the Marketization of the health care system, which generates an unequal relationship between doctors and patients. Such a relationship makes patients unable to actively protect their rights. From a bioethical perspective, health is a basic right for everyone. In order to improve the physician-patient relationship, health rights must be considered as a priority in policy making. Although the Chinese government has been trying to implement universal health coverage, a progress indeed, problems and difficulties still exist in equalizing status between patients and doctors and in rebuilding a benign physician-patient relationship.     

个体差异对工作记忆训练迁移效果的调节

本研究考察了流体智力基线水平对工作记忆训练迁移效果的影响。采用前后测设计,以视觉和听觉双任务n-back作为工作记忆训练任务,对训练组进行为期一个月的训练;积极对照组采用阅读任务进行训练。结果发现积极控制组的流体智力水平在基线与后测之间无显著变化;而训练组流体智力水平在后测时与基线相比有显著提高,且工作记忆训练提升量越大的个体其流体智力改善越大。说明认知训练有效迁移到了流体智力水平的改善上。我们还发现流体智力基线水平调节了工作记忆训练对流体智力水平的迁移,即工作记忆训练提升量越大,流体智力改善值越大,对于那些流体智力基线水平较高的人来说,工作记忆训练对流体智力改善的效果更大。流体智力基线水平、工作记忆训练提升量及两者的乘积共同影响了流体智力改善值。这一结果表明个体差异如流体智力基线水平可以调节工作记忆训练对流体智力水平的迁移。     

Effects of exposure of mice to hindlimb unloading on leukocyte subsets and sympathetic nervous system activity

The hindlimb unloading (HU) rodent model was developed to simulate some of the aspects of spaceflight conditions. Our previous studies showed that exposure to HU for 48 h (h) followed by bacterial challenge, reduces the ability of mice to resist infection. The purpose of this study was to investigate the physiological changes in mice during the 48 h of exposure to HU to understand the mechanisms involved in the increased susceptibility to infection observed in mice subjected to these conditions. Female Swiss Webster mice were hindlimb-unloaded during 48 h. Blood samples, spleen and peritoneal cells were removed before and after 18 or 48 h of HU-exposure. Leukocyte subset analysis was performed in spleen and peritoneal cells by flow cytometry, and catecholamine levels were measured in plasma and whole spleen by a catecholamine enzyme immunoassay. Catecholamine levels measured in plasma and spleen were significantly greater in mice exposed to HU compared to control. This increase coincided with significant reductions in spleen size in the HU group. Flow cytometric analyses showed a significant reduction of splenic CD19 + B-cells and NK1.1+ cells in mice exposed to HU with a concomitant increase in T-cells. These results suggest that exposure to HU increases the activity of the sympathetic nervous system (SNS) and induces lymphocyte sub-population changes that may contribute to the deregulation of immunity seen in mice exposed to HU and, more importantly may predispose the otherwise healthy host to the subsequent reduced ability to resist infections.     

Efficacy of guided self-help behavioural activation and physical activity for depression: a randomized controlled trial

Behavioural activation and physical activity have received empirical support that highlight their efficacy in reducing depression. Even though both behavioural activation and physical activity share the common goal of reactivating the individual, limited research has directly compared these interventions, and more research is required to evaluate their efficacy when offered in low-intensity formats. The present study involves a randomized controlled clinical trial comparing the efficacy of two guided self-help interventions for the treatment of depression: behavioural activation and physical activity. Fifty-nine participants presenting mild-to-moderate symptoms of depression were randomized either to a behavioural activation intervention (n = 20), a physical activity intervention (n = 19) or a wait-list control group (n = 20). All participants completed symptom measure pre-, mid- and post-intervention, as well as at a two-month follow-up. Mixed-model analyses of variance revealed that both interventions were significantly more efficacious in reducing depressive symptoms in comparison with the control group. Physical activity involved significantly less time-investment compared to the behavioural activation condition (less than half the amount of time). These results indicate that physical activity and behavioural activation both effectively reduce depressive symptoms and are favourably applicable in low-intensity formats. Implications of these results and avenues for future research are discussed.     

Motivation and physical activity levels in bariatric patients involved in a self-determination theory-based physical activity program

ObjectiveThis study examines the associations between pre-to post-intervention changes in motivation and physical activity (PA) levels of bariatric patients involved in a 6-month postoperative PA program based on self-determination theory (SDT). We also explore the extent to which patients’ perception of autonomy support and basic psychological need satisfaction during the program were associated with changes in their motivation to exercise.MethodForty patients were assigned to a motivational PA intervention (MPAI-G) or to a control group (CG). Both groups completed questionnaires assessing the variables of interest and wore GT3X accelerometers before surgery and after the program.ResultsThirty-two participants (78.1% female) completed all measures and were included in the present analyses. CG showed greater increases in integrated (d = −1.60, 95% CI [−2.40, −0.81]) and identified regulation (d = −0.75, 95% CI [−1.47, −0.03]) than MPAI-G. However, the MPAI-G experienced increases in introjected regulation (d = 1.95, 95% CI [1.11, 2.79]) and greater decreases in external regulation (d = −1.00, 95% CI [−1.74, −0.27]) than CG, which were associated with decreases in sedentary activity and increases in light and total PA. Oppositely to the CG, amotivation decreased in the MPAI-G (d = −2.98, 95% CI [−3.98, −1.97]) and it was related to increases in light and total PA. Changes in exercise motivation were associated with perceived autonomy support and basic psychological need satisfaction during the program.ConclusionThe SDT-based PA program gave rise to greater changes in controlled forms of motivation and amotivation than in autonomous motivation in post-bariatric surgery patients.     

Sympathetic nervous activity, depressive symptoms, and metabolic syndrome in black Africans: the sympathetic activity and ambulatory blood pressure in Africans study

The aim of this study was to examine the association between sympathetic nervous activity, depressive symptoms, and metabolic syndrome in a sample of black and Caucasian Africans. The sample consisted of healthy men and women: 194 blacks (aged, mean?±?SD, 44.1?±?7.9 years) and 206 Caucasians (aged, mean?±?SD, 44.7?±?10.8 years). Salivary 3-methoxy-phenylglycol (MHPG) concentration, the major metabolite of norepinephrine, was measured during the Stroop mental challenge. Depressive symptoms were assessed from the 9-item Patient Health Questionnaire. Metabolic syndrome (defined as central obesity plus any other two risk factors including raised serum triglycerides, reduced serum high-density lipoprotein- cholesterol, raised blood pressure, and raised fasting plasma glucose) was prevalent in 43.0% and 36.4% of blacks and Caucasians, respectively. In blacks there was, on average, a 16.4% increase in salivary MHPG concentration following mental stress, although no significant response was observed in Caucasians. The salivary MHPG response in blacks was associated with risk of metabolic syndrome (odds ratio [OR]?=?1.11, 95% CI, 1.00-1.24) after adjusting for age, sex, and baseline salivary MHPG concentration. This association was mainly driven by the central obesity component of the metabolic syndrome. The salivary MHPG response was also related to moderate-severe depressive symptoms (OR?=?1.16, 95% CI, 1.04-1.30), and further adjustment for depressive symptoms attenuated the association between salivary MHPG response and metabolic syndrome (OR?=?1.07, 95% CI, 0.96-1.20). These data indicate an association between sympathetic activity, depressive symptoms, and metabolic syndrome in a sample of black Africans.     

Social exclusion reduces the sense of agency: Evidence from intentional binding

Social exclusion is known to induce an immediate threat to one’s perceived sense of control. The sense of agency is an important human experience, strongly associated with volitional action. Healthy participants perceive the temporal interval between a voluntary action and its effect to be shorter than the same interval when it separates an involuntary action and effect. This temporal illusion is known as intentional binding and is used experimentally to index the implicit sense of agency. The current study investigated whether activating memories of social exclusion alters intentional binding. Results show that action-effect interval estimates are significantly longer after remembering an episode of social exclusion than after remembering an episode of social inclusion, or a no priming baseline condition. This study is the first to demonstrate the link between feelings of social exclusion and the pre-reflective sense of agency.     

Validation of a simple method of assessing cardiac preejection period: a potential index of sympathetic nervous system activity

Traditional noninvasive assessment of sympathetic nervous system (SNS) activity in cardiovascular functioning has been confounded by concurrent parasympathetic influences. Analyses of specific intervals of the cardiac cycle have indicated that the systolic preejection period (PEP) may serve as a reliable index of SNS activity independent of parasympathetic inhibition. In the present study, PEP values derived from a technique employing peripheral pulse wave tracings were compared to values obtained from simultaneous impedance cardiograph recordings. Recordings were made on 15 male subjects who were instructed to rest quietly sitting in an upright position. Results indicated that values obtained from both methods were highly correlated and not significantly different when measurement adjustments on total systole were taken into account. These findings support the validity of the fingertip peripheral-pulse method in obtaining measures of systolic time intervals under resting conditions.     

Positive emotions have different impacts on mood and sympathetic changes in crying from negative emotions

Motivation and Emotion - Emotional crying has been extensively discussed but has concentrated on crying as a result of negative emotion. There are few psychological and neurophysiological findings...     

Age-related differences in actual and perceived levels of physical activity in adolescent girls

Age-related differences in actual and perceived physical activity were investigated in a sample of adolescent girls, also considering the relationship between physical activity and motor abilities. Self-reported physical activity was measured in 11-year-old (n=66) and 13-year-old (n=52) girls by means of the physical activity questionnaire-children form, and actual levels of activity were assessed by means of the Lifecorder uniaxial accelerometer. The Sit-and-Reach Test was employed to estimate flexibility, while lower limb strength was measured by squat jump and counter-movement jump tests. Weight and height were measured, and sex-specific age-related body mass index cutoff points were used to identify overweight and obesity. Findings showed a drop in objective vigorous physical activity in older girls, which was also reflected in the physical activity questionnaire. Contrary to expectations, no association was found between motor abilities and measured physical activity. Results highlight the need to understand the reasons why girls progressively reduce their involvement in physical activity as they get older, so as to plan interventions aimed at preventing this decline.