Sleep misperception and chronic insomnia in the general population: role of objective sleep duration and psychological profiles.

Objective: To examine the role of objective sleep duration, a novel marker in phenotyping insomnia, and psychological profiles on sleep misperception in a large, general population sample. Sleep misperception is considered by some investigators a common characteristic of chronic insomnia, whereas others propose it as a separate diagnosis. The frequency and the determinants of sleep misperception in general population samples are unknown.

Cognitive-emotional hyperarousal as a premorbid characteristic of individuals vulnerable to insomnia.

Objective: To examine whether cognitive-emotional hyperarousal is a premorbid characteristic of middle-aged and young good sleepers vulnerable to stress-related insomnia.

Methods: Self-reported information was collected from two samples of 305 middle-aged and 196 young adults. From those adults, 149 middle-aged (50.

Evidence of subthalamic PGO-like waves during REM sleep in humans: a deep brain polysomnographic study.

Study Objectives: The aim of this study was to examine whether the subthalamic nucleus (STN) plays a role in the transmission of PGO-like waves during REM sleep in humans.

Design: Simultaneous recordings from deep brain electrodes to record local field potentials (LFPs), and standard polysomnography to ascertain sleep/wake states.

Setting: Main Hospital, department of clinical neurophysiology sleep laboratory.

Nighttime sleep and daytime functioning correlates of the insomnia complaint in young adults.

The nighttime and daytime correlates of the insomnia complaint (IC) were assessed in an in-class survey on a sample of 1238 first year university students (18.85+/-1.45 years) at the Universidad Autónoma of Madrid, Spain.