Earlier studies have used the dexamethasone (DEX) suppression test (DST) to investigate the hypothalamicpituitary-adrenal (HPA) function in schizophrenia, although the findings are controversial. Recently there has been an increased interest in the role of dehydroepiandrosterone (DHEA) and its sulfate (DHEAS) in HPA axis function. Several studies have investigated basal DHEA(S) levels and corti...

BACKGROUND Reported findings are inconsistent whether hypothalamic-pituitary-adrenal (HPA) signaling becomes hyperactive with increasing age, resulting in increasing levels of cortisol. Our previous research strongly suggests that offspring from long-lived families are biologically younger. In this study we assessed whether these offspring have a lower HPA axis activity, as measured by lower le...

background: noise is one of the most important hazardous physical factors in industrial environments. this study aimed to determine the effects of noise exposure on serum cortisol level and some blood parameters among male workers of a steel production company. methods: this cross-sectional study was conducted on 50 male workers in a steel production company. in order to assess the changes in b...

The study on the ecophysiological impacts of stress in female Persian sturgeon broodfishes revealed that the average cortisol level varried in all broodfish caught at the Sefidrud River (163.38±21.2ng mL-1), Sefidrud River estuary (260.27±19.7ng mL-1) and Gorganrud River estuary (179.38±20.8ng mL-1). The variations in serum glucose levels were 140.65±12.05mg dL-1, 144.44±5.9mg dL-1 and 126.24±1...

BACKGROUND The objective of this study was to evaluate the contribution of personality traits in explaining the relationship between workplace stressors and variations in salivary cortisol concentrations. METHOD Multilevel regression analyses were performed on a sample of 401 employees from 34 Quebec firms. Saliva samples were collected five times a day (on awakening, 30 min after awakening, ...

The steroid hormone cortisol has been associated with different levels of "stress" as well as different reproductive conditions in many primates. In callitrichids, cortisol has more often been reflective of female reproductive status than of chronic stress. In this study, we addressed the hypothesis that wild golden lion tamarin (Leontopithecus rosalia) females, whose social structure is charac...

Isaksson, J. 2014. ADHD and stress. Diurnal cortisol levels, early psychosocial adversity and perceived stress. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine 957. 59 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-8822-2. The Hypothalamus-Pituitary-Adrenal axis (HPA-axis) with its end product cortisol mediates the physiological response to st...

Prior studies assessing the relation between negative affective traits and cortisol have yielded inconsistent results. Two studies assessed the relation between individual differences in repressive-defensiveness and basal salivary cortisol levels. Experiment 1 assessed midafternoon salivary cortisol levels in men classified as repressors, high-anxious, or low-anxious. In Experiment 2, more rigo...

Two studies investigated the association between cortisol levels and memory performance in healthy adults. In a first study, 13 subjects were exposed to a brief psychosocial laboratory stress ("Trier Social Stress Test") with a subsequent test of declarative memory performance. Results indicated a significant negative relationship between stress-induced cortisol levels and performance in the me...

OBJECTIVES We examined associations between cognitive function (CF) and the naturally occurring daily cortisol levels using data from the Midlife in the United States survey and the National Study of Daily Experiences. METHODS A national sample of 1,500 (mean age = 57 years; range = 33-84, 56% female) completed a phone-based battery of cognitive tasks and 3-6 months later provided saliva samp...