Maternal separation can interfere with growth and development of the brain and represents a significant risk factor for adult psychopathology. In rodents, prolonged separation from the mother affects the behavioral and endocrine responses to stress for the lifetime of the animal. Limbic structures such as the anterodorsal thalamic nuclei (ADTN) play an important role in the control of neuroendocrine and sympathetic-adrenal function. In view of these findings we hypothesized that the function of the ADTN may be affected in an animal model of maternal deprivation. To test this hypothesis female rats were isolated 4.5 h daily, during the first 3 weeks of life and tested as adults. We evaluated plasma epinephrine (E) and norepinephrine (NE), cardiac adrenoreceptors and anxiety responses after maternal deprivation and variable chronic stress (VCS) in ADTN-lesioned rats. Thirty days after ADTN lesion, in non-maternally deprived rats basal plasma NE concentration was greater and cardiac beta-adrenoreceptor density was lower than that in the sham-lesioned group. Maternal deprivation induced a significant increase in basal plasma NE concentration, which was greater in lesioned rats, and cardiac beta-adrenoreceptor density was decreased in lesioned rats. After VCS plasma catecholamine concentration was much greater in non-maternally deprived rats than in maternally-deprived rats; cardiac beta-adrenoreceptor density was decreased by VCS in both maternally-deprived and non-deprived rats, but more so in non-deprived rats, and further decreased by the ADTN lesion. In the plus maze test, the number of open arm entries was greater in the maternally deprived and in the stressed rats. Thus, sympathetic-adrenal medullary activation produced by VCS was much greater in non-deprived rats, and was linked to a down regulation of myocardial beta-adrenoceptors. The ADTN are not responsible for the reduced catecholamine responses to stress in maternally-deprived rats. Maternal deprivation or chronic stress also induced a long term anxiolytic effect, which was also not affected by ADTN lesion. 相似文献
We examined the reciprocal relations among prosocial behavior, satisfaction of relatedness needs at school, and subjective well-being in school among Chinese elementary school students using a 3-wave longitudinal study with a 6-month interval. A total of 1018 elementary school students (Mage = 9.44 years; 53.90% male) completed a multi-measure questionnaire that tapped the targeted variables at three time points. After controlling for gender, age, and parental educational level, the results revealed that (a) Prosocial behavior, satisfaction of relatedness needs at school, and subjective well-being in school reciprocally facilitated each other directly; (b) prosocial behavior indirectly enhanced subjective well-being in school via satisfaction of relatedness needs at school, and subjective well-being in school indirectly enhanced prosocial behavior via satisfaction of relatedness needs at school. Limitations and practical applications were discussed.
ABSTRACTImmigrant origin children and youth are now, and will continue to be, a diverse and demographically important segment of all post-industrial nations’ populations. In order to realize their potential, receiving contexts will need to find effective ways to integrate them into the fabric of their society. Using an ethic of care approach, we must begin by taking a comprehensive perspective on integration, which incorporates both a risk and resilience framework and an ecological perspective. A number of practices have emerged that have promise for positive implications for the schooling performance and educational integration of immigrant students These practices include 1 – short-term newcomer programs; 2 – specialized services for Students with Interrupted Formal Education; 3 – sustained services focused on new language development; 4 – services focused on heritage language development; 5 – providing explicit college pathway knowledge; 6 – summer and after-school academic enrichment programs; 7 – facilitating parental involvement (including translation and interpretation services); and 8 – advisory groups, after-school academic supports, mentoring and health services, and postsecondary supports. Providing the kinds of ecologies of care outlined here will go a long way toward helping these children and youth thrive and become the kinds of contributing members to their new society that will serve our collective future well. 相似文献
The purpose of this study was to investigate the role of emotional intelligence in relation to core self-evaluations (CSE) and work-related well-being. A sample of 356 employees who are all females completed measures of CSE, emotional intelligence, job satisfaction and work engagement. Results revealed that higher levels of CSE were correlated with higher levels of emotional intelligence, job satisfaction and work engagement. Higher levels of emotional intelligence were associated with greater job satisfaction and work engagement. Structural Equation Modeling (SEM) indicated that emotional intelligence partially mediated the association between CSE and work-related well-being. The results revealed the importance of emotional intelligence in order to improve occupational well-being of employees. This research makes a contribution to the potential mechanism of the relationship between CSE and work-related well-being. 相似文献
Visual statistical learning (VSL), the unsupervised learning of statistical contingencies across time and space, may play a key role in efficient and predictive encoding of the perceptual world. How VSL capabilities vary as a function of ongoing task demands is still poorly understood. VSL is modulated by selective attention and faces interference from some secondary tasks, but there is little evidence that the types of contingencies learned in VSL are sensitive to task demands. We found a powerful effect of task on what is learned in VSL. Participants first completed a visual familiarization task requiring judgments of face gender (female/male) or scene location (interior/exterior). Statistical regularities were embedded between stimulus pairs. During a surprise recognition phase, participants showed less recognition for pairs that had required a change in response key (e.g., female followed by male) or task (e.g., female followed by indoor) during familiarization. When familiarization required detection of “flicker” or “jiggle” events unrelated to image content, there was weaker, but uniform, VSL across pair types. These results suggest that simple task manipulations play a strong role in modulating the distribution of learning over different pair combinations. Such variations may arise from task and response conflict or because the manner in which images are processed is altered. 相似文献
Although music and dance are often experienced simultaneously, it is unclear what modulates their perceptual integration. This study investigated how two factors related to music–dance correspondences influenced audiovisual binding of their rhythms: the metrical match between the music and dance, and the kinematic familiarity of the dance movement. Participants watched a point-light figure dancing synchronously to a triple-meter rhythm that they heard in parallel, whereby the dance communicated a triple (congruent) or a duple (incongruent) visual meter. The movement was either the participant’s own or that of another participant. Participants attended to both streams while detecting a temporal perturbation in the auditory beat. The results showed lower sensitivity to the auditory deviant when the visual dance was metrically congruent to the auditory rhythm and when the movement was the participant’s own. This indicated stronger audiovisual binding and a more coherent bimodal rhythm in these conditions, thus making a slight auditory deviant less noticeable. Moreover, binding in the metrically incongruent condition involving self-generated visual stimuli was correlated with self-recognition of the movement, suggesting that action simulation mediates the perceived coherence between one’s own movement and a mismatching auditory rhythm. Overall, the mechanisms of rhythm perception and action simulation could inform the perceived compatibility between music and dance, thus modulating the temporal integration of these audiovisual stimuli. 相似文献