Discrepancy between objective and subjective sleep, referred to as sleep misperception, is common in normal sleepers but is most evident in insomniacs (1). Sleep and wake stages are typically defined by electroencephalographic (EEG) patterns. EEG is only one neurophysiological aspect of the sleep state and researchers have tried to correlate other factors with EEG sleep/wake patterns. These fac...

STUDY OBJECTIVES The purpose of this study was to analyze the relationship between food intake and sleep patterns in healthy individuals. METHODS Fifty-two healthy volunteers (27 women and 25 men) were recruited to participate in the study. Volunteers underwent sleep evaluation through nocturnal polysomnography and completed a 3-day food diary to evaluate food intake. RESULTS No differences...

Teens tend go to bed later, get less sleep, and report more daytime sleepiness. Medical research emphasizes biological determinants of teens' disrupted sleep (i.e., the timing of puberty and resultant drops in melatonin), rarely or inadequately considering youths' social ties as a determinant of sleep behaviors. Sociologists recognize how social ties affect health behaviors but have generally n...

The purpose of this investigation is to examine differences in rest-activity patterns and sleep characteristics in older adults with heart failure (HF) and healthy older adults. The sample included older adults with HF (n = 20) and a reference group of healthy older adults (n = 20). Traditional cosinor analysis was used to assess three parameters of rest-activity from wrist actigraphy data: amp...

Why do we sleep? The sleep patterns and mechanisms that occur throughout development may give us a clue.

In the normal aging process, sleep changes accompany with increasing sleep fragmentation, nighttime awakenings and greater tendency for daytime sleep. Dementia provokes further deterioration of sleep patterns.1 The prevalence of Alzheimer’s disease (AD), most common form, is rapidly increasing and will probably accelerate dramatically within the next decades as a numbers of people are getting o...

We compared subjective and objective sleep patterns and problems, and examined cross-method correspondence across parent reports, child reports, and actigraphy-derived sleep variables in clinically-anxious children and healthy controls. In a multi-site, cross-sectional study, 75 pre-adolescent children (6 to 11 years; M = 8.7 years; SD = 1.4; n = 39/52 % female) were examined including 39 with ...

In this paper, we present a method that can be used to automatically classify sleep states in an all-night polysomnogram (PSG) to generate a hypnogram for the assesment of sleep-related disorders. The method is based on ideas of segmentation and classification (clustering) using sleep related features. Segments are clustered to generate groups of similar patterns that can subsequently be labele...