The aim of this study was to determine the relationship between circadian preferences, regularity of sleep patterns, sleep problems, daytime sleepiness and daytime behaviour. As a part of an epidemiological survey on sleep in a representative sample of Italian high-school students, a total of 6631 adolescents, aged 14.1-18.6 years, completed the School Sleep Habits Survey, a comprehensive quest...

The pineal gland, as part of the human epithalamus, is the main production site of peripheral melatonin, which promotes the modulation of sleep patterns, circadian rhythms and circadian preferences (morningness vs. eveningness). The present study analyses the pineal gland volume (PGV) and its association with circadian preferences and symptom severity in adult ADHD patients compared to healthy ...

Abstract Chronotypes are diversely associated with sleep quality and mental health. Eveningness is generally lower increased risk for health complaints. Along insomnia symptoms, frequent dysphoric dreams might be key elements of disturbed sleep, may also indicate psychological imbalance. Our cross-sectional online study aimed to examine whether eveningness can considered as an independent facto...

BACKGROUND   Two understudied risk factors that have been linked to emotional difficulties in adolescence are chronotype and sleep deprivation. This study extended past research by using an experimental design to investigate the role of sleep deprivation and chronotype on emotion in adolescents. It was hypothesized that sleep deprivation and an evening chronotype would be associated with decrea...

The relationship of meal habits and alcohol/cigarette consumption to circadian typology and sleep health in Japanese female students was studied from an epidemiological point of view. Questionnaires on Morningness-Eveningness by Torsvall and Akerstedt (1980), sleep habits, regularity of meal intake and meal amount, and style of alcohol and cigarette consumption were administered to 800 students...

Morningness-eveningness or chronotype changes significantly throughout the life span. This has been reported for the transition during adolescence in some studies, and to a lesser extent in early adulthood. Primary and pre-school children have been under investigation in fewer studies. This is the first comprehensive study covering the age range from very young children until early adulthood (0...

abstract background: simultaneous occurrence of psychiatric disorders and substance abuse isorders have widespread effects and are associated with worse prognosis. addicts should be treated in accordance with the requirements of each of these people. this study aimed at investigating the simple and multiple relationships between morningness/eveningness, anxiety sensitivity and addiction potenti...

Recently, interindividual differences in tolerance to shift work have become an increasing interest in chronobiological shift work studies.1) A number of factors have been investigated2) such as sex, age, general health status, quality and quantity of sleep, internal desynchronization between body temperature and sleep-wake cycle, morningness-eveningness, introversion-extroversion, job satisfic...

A single nucleotide polymorphism located in the 3' flanking region of the human CLOCK gene was investigated as a predictor of diurnal preference in a population-based random sample of 410 normal adults. Morningness-eveningness preferences were determined using the 19-item Home-Ostberg questionnaire. Subjects carrying one of the two CLOCK alleles, 3111C, had a significantly lower mean Horne-Ostb...