Sleep disturbances and depression are bidirectionally associated among college student athletes across COVID-19 pandemic exposure classes

College athletes may be vulnerable to sleep disturbances and depression during the COVID-19 pandemic as a result of large shifts in social and athletic obligations. In a national sample of college athletes, we examined the associations between sleep disturbances and depression across two timepoints, using COVID-19 exposure as a moderator. Data were collected from 2098 NCAA Division I, II, and III college athletes during two timepoints, from April 10 to May 23, and from August 4 to September 15, 2020. First, a latent class analysis was conducted with five indicators of levels of COVID-19 exposure to determine different exposure profiles. Second, to examine the directionality of associations between sleep disturbance and depression, a cross-lagged panel model was added to the latent class membership structural equation model; this allowed for testing of moderation by COVID exposure class membership. Four highly homogeneous, well-separated classes of COVID-19 exposure were enumerated: Low Exposure (57%); Quarantine Only (21%); High Other, Low Self Exposure (14%); and High Exposure (8%). COVID-19 exposure class membership did not significantly moderate associations between sleep disturbances and depression. However, student athletes significantly differed in T2 depression by their COVID-19 exposure class membership. Depression and sleep disturbances were positively correlated at both timepoints (r_T1 = 0.39; r_T2 = 0.30). Additionally, cross-lagged associations were found such that T2 depression was associated with T1 sleep disturbances (β = 0.14) and vice versa (β = 0.11). These cross-lagged associations were not significantly affected by athletes’ level of COVID-19 exposure during the beginning of the pandemic.     

Absorbed in sleep: Dissociative absorption as a predictor of sleepiness following sleep deprivation in two high-functioning samples

In recent years, a labile sleep-wake cycle has been implicated as a cause for dissociative experiences, and studies show that dissociation is elevated following sleep deprivation. Dissociative individuals may find it harder to regulate sleepiness in the face of sleep disruption. Although there is significant variability in reactions to sleep deprivation, research on trait predictors is scarce. The present study examined the ability of trait dissociation to prospectively predict sleepiness following sleep loss and recovery sleep. Two high-functioning samples, namely, Remotely Piloted Aircraft officers (N = 29) and Air Force jet pilots (N = 57) completed state and trait questionnaires assessing sleep and dissociation before and after full or partial sleep loss. Dissociative absorption was a consistent predictor of an increase in sleepiness following sleep loss and following recovery sleep, controlling for baseline sleepiness levels. We discuss the findings in light of a difficulty to regulate and monitor consciousness states.     

Sleep deprivation and sustained attention performance: integrating mathematical and cognitive modeling

A long history of research has revealed many neurophysiological changes and concomitant behavioral impacts of sleep deprivation, sleep restriction, and circadian rhythms. Little research, however, has been conducted in the area of computational cognitive modeling to understand the information processing mechanisms through which neurobehavioral factors operate to produce degradations in human performance. Our approach to understanding this relationship is to link predictions of overall cognitive functioning, or alertness, from existing biomathematical models to information processing parameters in a cognitive architecture, leveraging the strengths from each to develop a more comprehensive explanation. The integration of these methodologies is used to account for changes in human performance on a sustained attention task across 88 h of total sleep deprivation. The integrated model captures changes due to time awake and circadian rhythms, and it also provides an account for underlying changes in the cognitive processes that give rise to those effects. The results show the potential for developing mechanistic accounts of how fatigue impacts cognition, and they illustrate the increased explanatory power that is possible by combining theoretical insights from multiple methodologies.     

Insomniacs' reported use of CBT components and relationship to long-term clinical outcome.

Although there is considerable evidence for the efficacy of non-pharmacological treatment of insomnia, many of the larger trials have delivered CBT in multicomponent format. This makes it impossible to identify critical ingredients responsible for improvement. Furthermore, compliance with home implementation is difficult to ascertain in psychological therapies, and even more so when trying to differentiate across a range of elements. In the present report, 90 patients who had completed 12 month follow-up after participation in a clinical effectiveness study of CBT in general medical practice, responded to a questionnaire asking them about their use of the ten components of the programme. Reports of home use were then entered as predictors of clinical response to treatment. Results indicated that reported home use of stimulus control/sleep restriction was the best predictor of clinical improvement in sleep latency and nighttime wakefulness. Cognitive restructuring also contributed significantly to reduction in wakefulness. In spite of being the most highly endorsed component (by 79% of respondents) use of relaxation did not predict improvement on any variable. Similarly, sleep hygiene was unrelated to sleep pattern change and use of imagery training was modestly predictive of poor response in terms of sleep latency. There are methodological limitations to this type of post hoc analysis, nevertheless, these results being derived from a large patient outcome series raise important issues both for research and clinical practice.     

Cyberpsychology, Human Relationships, and Our Virtual Interiors

Recent research suggests an "Internet paradox"—that a communications technology might reduce social involvement and psychological well–being. In this article I examine some of the limitations of current Internet communication, including those of access, medium, presentation , and choice , that bear on the formation and maintenance of social relationships. I also explore issues central to human meaning in a technological culture—those of the history of the self, of individuality, and of human relationships—and suggest that social forces, technological and otherwise, have increasingly eroded our social interconnectedness and even produced psychological fragmentation. Finally, by considering the psychology of privacy, subjectivity, and intimacy, I look at the historical and developmental processes of internalization by which we construct the "virtual interior" of mind. Understanding this link between human meaning and technological culture, in the form and pattern of our virtual interiors, may help us to see opportunities as well as dangers for the growth of our humanity, our ethics, and our spirituality.     

Sleep deprivation in Air National Guard medical personnel responding to simulated disaster-training exercises

National Guard personnel remain largely unstudied within the sleep research community, despite their unique and important role. In response, the purpose of this study was to investigate the extent of sleep deprivation in National Guard medical personnel from two separate Air Force Bases (AFBs) responding to simulated disaster-training exercises. National Guard medical personnel (N = 77) were fitted with wrist activity monitors (actigraphy) to objectively measure their sleep for 4 days of their civilian time (baseline), followed by a 4-day transition period from civilian to military duty, and a 3–5-day disaster-training exercise. Differences in sleep quantity, quality, and “cognitive effectiveness” were analyzed using generalized linear mixed models. Participants’ sleep quantity was significantly reduced from civilian to disaster-training periods, and their cognitive effectiveness also dropped significantly. National Guard medical personnel were sleep-deprived during a simulated disaster-training exercise, which, although a valid proxy for real-world disasters, is likely to be a conservative approximation of the stress and fatigue National Guard personnel experience during crisis response. As such, the need for targeted fatigue-related interventions to safeguard our service members during these critical times is clear.     

An open trial of cognitive therapy for chronic insomnia

We describe the development of a cognitive therapy intervention for chronic insomnia. The therapy is based on a cognitive model which suggests that the processes that maintain insomnia include: (1) worry and rumination, (2) attentional bias and monitoring for sleep-related threat, (3) unhelpful beliefs about sleep, (4) misperception of sleep and daytime deficits and (5) the use of safety behaviors that maintain unhelpful beliefs. The aim of cognitive therapy for insomnia is to reverse all five maintaining processes during both the night and the day. In an open trial 19 patients meeting diagnostic criteria for primary insomnia were treated with cognitive therapy for insomnia. Assessments were completed pretreatment, posttreatment and at 3-, 6- and 12-month followup. The significant improvement in both nighttime and daytime impairment evident at the posttreatment assessment was retained up to the 12 month followup.     

心理时间的分割与整合

在心理时间的研究中存在两种观点。一种观点认为,心理时间是以整合的方式呈现,心理时间的整合是对各种实验结果所得出的时间经验的概括与综合。另一种观点将心理时间进行分割,时序信息加工通过知觉重组和外部计数操作反映出来,这些活动受一个目标间隔内发生的事件结构的层次性所支配,分割心理时间的观点强调时距估计中期望的作用,但它不能解释非时序信息加工路径的影响。     

Emotional and behavioural features of preschool children born by Caesarean deliveries at maternal request

Background: Caesarean deliveries at maternal request (CDMRs) are becoming increasingly common. There is still lack of evidence on potential postponed effect(s) of CDMRs on children's emotional and behavioural features, although such a possibility has been repeatedly postulated. This study aimed at evaluation of the emotional and behavioural characteristics in preschool children born from CDMRs. Methods: The study involved apparently healthy 5-year-old children from the community setting (40 born from CDMRs and 40 age and sex matched vaginally born controls). Inclusion criteria were: first-born singletons, delivery at term, the only children in families, married parents, and appropriate household conditions, absence of any inborn abnormalities, disabilities, chronic and progressive diseases. Children attended preschool day-care centres at the time of the study. The mothers were also presented with the Child Behaviour Checklist for Ages 1.5–5 years (CBCL1.5/5) aimed at assessing children's emotional and behavioural characteristics. Results: Children born from CDMRs presented with significantly higher values (more problems) on the following empirically based scales: anxiety/depression, withdrawal and sleep problems. They had statistically significantly higher values on so-called internalizing problems, both in girls and in boys. Associations remained significant after adjustment for major potential confounders. Conclusion: Children born from CDMRs may face more emotional disturbances and sleep problems at preschool age.     

阻塞性睡眠呼吸暂停低通气综合征导致高血压的机制

阻塞性睡眠呼吸暂停低通气综合征是重要的继发性高血压病因之一,该综合征导致血压增高的原因主要有睡眠分裂、频繁的低氧血症和高碳酸血症导致的高交感神经兴奋,呼吸暂停发生时胸腔负压的增加和回心血量的增加以及内分泌功能的失调如醛固酮的高分泌,超重肥胖和慢性非特异性炎症反应的参与,是多种升压机制共同参与的结果.