Objectives: (i) To expose ‘normal sleepers’ to a 32-h sleep deprivation protocol and evaluate the impact of this deprivation on a complex performance task i.e. the paced auditory serial addition test (PASAT). (ii) To compare these sleep deprivation performance findings with historical data on the impact of sleepiness secondary to narcolepsy on PASAT performance measures. (iii) To investigate th...

Although the prevalence rates of sleep disorders at different stages of childhood and adolescence have been well established, little is known about the developmental course of general sleep problems. This also holds true for the bidirectional relationship between sleep problems and emotional as well as behavioral difficulties. This longitudinal study investigated the general pattern and the lat...

Electrical resistance is among the characteristics that fastening systems must meet to ensure proper functioning of signaling in railway infrastructure. The EN 13146-5:2012 standard specifies a laboratory testing method for determining electrical under wet conditions between running rails provided by system on steel or concrete sleepers. In urban tracks, affects stray current; however, there no...

BACKGROUND Epidemiologic studies have shown an inverse or U-shaped relation between sleep duration and body mass index (BMI; in kg/m(2)). Moreover, associations between energy balance (EB) and characteristics of quality sleep (QS) have recently been reported. OBJECTIVE We assessed the relation between total energy expenditure (TEE) as well as substrate oxidation and QS after disturbed compare...

INTRODUCTION Sleep disturbance is a common nonmotor symptom of Parkinson's disease (PD) and strongly affects patients' quality of life. The relationship between excessive daytime sleepiness (EDS) and nighttime problems remains uncertain. Arguments persist regarding the risk factors for sleep disturbance among patients with PD. Furthermore, the prevalence of EDS appears to be lower in Asian coun...

OBJECTIVES Unhelpful beliefs about sleep have been linked to insomnia, and increasing one's cognitive flexibility about sleep has been linked to posttreatment sleep improvement. This study evaluated whether levels of such beliefs differ across insomnia groups and whether there are particular beliefs that differ for specific insomnia subtypes. METHODS Participants (N=1384) were people with ins...

Circadian rhythms influence sleep and wakefulness. Circadian activity rhythms (CAR) are altered in individuals with dementia or seasonal affective disorder. To date, studies exploring CAR and sleep in postpartum women are rare. The purpose of this report is to describe relationships between CAR, sleep disturbance, and fatigue among 72 first-time mothers during their second week postpartum while...

PURPOSE/OBJECTIVES To distinguish relationships among subjective and objective characteristics of sleep, mood, and quality of life (QOL) in patients receiving treatment for lung cancer. DESIGN Descriptive, correlational study. SETTING Two ambulatory oncology clinics. SAMPLE 35 patients with lung cancer. METHODS The following instruments were used to measure the variables of interest: Pi...

PURPOSE To characterize sleep patterns and predictors of poor sleep quality in a large population of college students. This study extends the 2006 National Sleep Foundation examination of sleep in early adolescence by examining sleep in older adolescents. METHOD One thousand one hundred twenty-five students aged 17 to 24 years from an urban Midwestern university completed a cross-sectional on...

BACKGROUND Impaired quality of life (QOL) is an issue considered in patients with multiple sclerosis (MS). There are limited studies evaluated poor sleep and impaired QOL in these cases. The aim of this study was to evaluate quality of sleep and poor sleep in Iranian patients with MS and the relationship between Pittsburgh Sleep Quality Index (PSQI) score and QOL subscales. METHODS One-hundre...