Sleep EEG changes during adolescence: An index of a fundamental brain reorganization

Delta (1–4 Hz) EEG power in non-rapid eye movement (NREM) sleep declines massively during adolescence. This observation stimulated the hypothesis that during adolescence the human brain undergoes an extensive reorganization driven by synaptic elimination. The parallel declines in synaptic density, delta wave amplitude and cortical metabolic rate during adolescence further support this model. These late brain changes probably represent the final ontogenetic manifestation of nature’s strategy for constructing nervous systems: an initial overproduction of neural elements followed by elimination. Errors in adolescent brain reorganization may cause mental illness; this could explain the typical age of onset of schizophrenia. Longitudinal studies of sleep EEG are enhancing our knowledge of adolescent brain maturation. Our longitudinal study of sleep EEG changes in adolescence showed that delta power, which may reflect frontal cortex maturation, begins its decline between ages 11 and 12 years and falls by 65% by age 17 years. In contrast, NREM theta power begins its decline much earlier. Delta and theta EEG frequencies are important to sleep theory because they behave homeostatically. Surprisingly, these brain changes are unrelated to pubertal maturation but are strongly linked to age. In addition to these (and other) maturational EEG changes, sleep schedules in adolescence change in response to a complex interaction of circadian, social and other influences. Our data demonstrate that the daytime sleepiness that emerges in adolescence is related to the decline in NREM delta as well as to altered sleep schedules. These longitudinal sleep data provide guideposts for studying cognitive and behavioral correlates of adolescent brain reorganization.     

压力反应、压力应对与睡眠质量关系述评

压力反应是个体应对应激源作用时所产生的非特异性表现, 而压力应对是个体社会生活中一种综合的压力适应过程。压力反应及其应对是压力与睡眠质量之间的重要变量。生理、认知、情绪和行为等方面的压力反应与睡眠质量有直接的交互作用, 而认知调节、情绪调节、应对方式、社会支持和人格倾向等压力应对因素则能够改变压力与睡眠之间相互作用的强度、持续时间以及最终结果。     

Explaining the protective effect of trait emotional intelligence regarding occupational stress: Exploration of emotional labour processes

This paper aims at understanding the processes explaining the protective effect of trait emotional intelligence (trait EI) regarding occupational stress. The present study focuses on a widespread occupational stressor: emotional labour (EL). EL refers to the act of managing emotions and emotional expressions in order to be consistent with organizational ‘display rules’, defined as the organizationally required emotions during interpersonal service transactions. As these display rules interact with employees spontaneous feelings, they regularly induce a clash between inner/real and required feelings. Different strategies exist to cope with this dissonance, with either beneficial or deleterious outcomes regarding psychological and physical health. The hypothesis underlying this study was that individuals varying in the level of trait EI would use different EL strategies, with different outcomes in terms of burnout and somatic complaints. Globally, the results showed that, when confronted with emotional labour, high trait EI individuals experience lower levels of burnout and somatic complaints, and this effect was found to be mediated by the choice of emotional labour strategies. Implications of these results for research, theory and practice are discussed.     

自我同情和睡眠质量的关系：积极和消极情绪与自我控制的中介作用

为探究积极和消极情绪与自我控制在自我同情与睡眠质量间的中介机制,采用问卷法对477名成人进行调查,建立结构方程模型对中介效应进行检验。结果发现：（1）自我同情、积极情绪、自我控制和睡眠质量两两之间均为显著正相关,而上述变量与消极情绪均为显著负相关;（2）自我同情可分别以积极情绪、消极情绪和自我控制为中介来预测睡眠质量;还可依靠消极情绪与自我控制的链式中介效应来间接预测睡眠质量,但自我同情对睡眠质量的直接效应不显著。该研究结果为改善睡眠质量提供了新的干预视角。     

Use of the Sleep Assessment Device (Kelley and Lichstein, 1980) to validate insomniacs' self-report of sleep pattern

A comparison is presented of insomniacs' self-reported sleep pattern and objectively monitored sleep using the Sleep Assessment Device (SAD; Kelley & Lichstein, 1980). Analysis of 110 subject nights revealed modest but significant subjective overestimates of both sleep latency and sleep duration which were accounted for by the demands of the task (i.e., longer time periods are harder to estimate accurately). Correlations between self-report and SAD measures were, however, consistently high, suggesting that self-report may be a valid index of sleep disturbance. Results are discussed with reference to the clinician's task in evaluating sleep complaints.This research stury was supported by a grant from the Research Fund of Lanarkshire Health Board, Scotland.     

MAKING SENSE OF SOUL AND SABBATH BRAIN PROCESSES AND MAKING OF MEANING

Abstract. Making sense of soul and Sabbath necessitates understanding these phenomena experientially and then suggesting "biochemical" or empirical analogues. Soul, which is defined as the core or essence of a person (or group), includes a working memory of personally purposeful behavior. The states of the soul are reflected in the states of the mind and their physiological correlates-the states of the brain. Such uniqueness appears similar to the biblical cycle of creation-Sabbath-consciousness and its analogue in the biorhythm of brain-mind-that is, waking and work, sleeping and rest, dreaming (rapid eye movement [REM]) and the reorganization-integration process that is ever making sense of our senses by synthesizing what they mean to us. Working memory and biorhythm, therefore, are crucial for the making of meaning, and meaning is the making of soul.     

Developmental changes of parental-reported sleep disturbance symptoms in children with attention deficit disorder

The primary goal of this retrospective study was to assess parental report of current sleep disorders in school-aged attention deficit disorder (ADD) children, as well as recalled sleep problems from when the children were infants (0–12 months) and toddlers (1–3 years). Results of a sleep questionnaire completed by mothers of 48 ADD children and a comparison group of 30 patients with school problems indicate that ADD children were perceived to have significantly more sleep problems and that these problems had onset in infancy. Specific items in the questionnaire which were increased included latency to sleep onset of more than 30 min at least 3 nights per week, fatigue upon awakening, and recall of nightmares. Pediatric clinicians should be alert to possible sleep disorders in children suspected of attention disorders and should consider sleep hygiene measures as a component of treatment.     

Co-morbidity of crying and feeding problems with sleeping problems in infancy: Concurrent and predictive associations

The co-morbidity of crying, feeding and sleeping problems at 5 months of age was investigated in a representative sample of 432 infants in South Germany. A crying, sleeping or feeding problem was reported in 32.7% of these infants by their parents and a further 14.6% had two or more of these problems. Little co-morbidity between crying and feeding problems was found. There were moderate to strong associations between crying and sleeping behaviours. Feeding problems showed little relationship to sleeping behaviour, but feeding type and frequency of feeds were related to night waking. Breastfed infants woke much more often at night. Crying and feeding problems at 5 months were poor predictors of sleeping behaviour at 20 or 56 months of age. Later sleeping behaviour was best predicted by infant sleeping behaviour. At 56 months, maternal distress due to sleeping and co-sleeping practices was predicted by maternal distress due to crying and feeding practices at 5 months of age. The predictions were significant but generally weak to modest in strength. Future studies on the consequences of crying or feeding problems should take into account patterns of co-morbidity. So-called ‘post-colicky’ sleep problems are not due to increased crying per se but rather appear to be the consequence of associated infant sleeping problems and parental caretaking patterns for dealing with night waking in infancy.