BACKGROUND Subjects with Alzheimer's disease (AD) have elevated cortisol levels as a result of hypothalamic-pituitary-adrenal (HPA) axis dysfunction. Acute administration of hydrocortisone has been associated with working memory (WM) performance in young adults. OBJECTIVE To investigate whether cortisol levels are associated with WM performance in subjects with AD. METHOD Eighty subjects we...

The stress hormone cortisol is known to influence memory. Elevated cortisol levels as a consequence of stress or as a consequence of cortisol administration have been repeatedly shown to enhance encoding and consolidation of (emotional) memory. Whether similar associations exist between basal cortisol levels and emotional memory remains to be established. The present study therefore evaluated i...

fisheries department, faculty of natural resources, university of guilan, sowmeh sara,1144, iran abstract this study was conducted the effect of stress on blood glucose and cortisol levels in cultured great sturgeon. blood sampling was done and then water level decreased to the half in experimental tanks. the fish were exposed in that situation and second blood sampling was taken after ...

BACKGROUND Characteristics associated with low socioeconomic status neighbourhoods may put children at risk for unique chronic stressors that affect cortisol levels. This research sought to explore whether neighbourhood stressor exposure affected serum cortisol levels among children. METHODS A total of 148 African and European-American children with an average age of 8.28 years participated i...

Background: Stress in preterm neonates is associated with morbidity and mortality. Preterm newborns who are in need of special care are at risk of experiencing stress because of separation from the mother, ambient noises, lighting intensity, and medical procedures. Massage is believed to reduce stress through touch stimulation, and the cortisol is one of the indicators of the stress response. T...

Whether glucocorticoids mediate medial prefrontal cortex (mPFC) regulation of the amygdala in humans remains unclear. In the current study we investigated whether cortisol levels under relatively stress-free circumstances are related to amygdala resting-state functional connectivity with the mPFC. Resting-state fMRI data were acquired from 20 healthy male participants. Salivary cortisol was sam...

In the present study, different oxygen levels were examined in two weight groups of great sturgeon Huso huso including small size (with initial weight 280.9 ± 49.2 g) and large size (with initial weight 1217.9 ± 138.1 g). The fish were kept in hypoxia (2-3 mg/l), normoxia (5-6 mg/l) and hyperoxia (9-10 mg/l) conditions for 8 weeks and then were individually placed in the tanks with oxygen lev...

UNLABELLED Previous research revealed hypothalamic-pituitary-adrenal (HPA) axis abnormalities in relation to antisocial and aggressive behavior. Some evidence suggests that low cortisol levels may serve as a biological marker for a severe antisocial subgroup with pronounced callous-unemotional (CU) traits. Children displaying the combination of severe antisocial behavior and CU traits appear to...

OBJECTIVES To compare salivary with serum total cortisol in patients with severe sepsis, postoperative patients and healthy controls. MATERIALS AND METHODS Serum total cortisol was determined by chemiluminescence immunoassay; salivary cortisol was determined by enzyme immunoassay. RESULTS In patients with severe sepsis, median concentration of salivary cortisol was 14.0 and 2.6 higher than ...