Corrigendum to "Relationship between perceived sleep and polysomnography in older adult patients" [Sleep Sci. 8 (2015) 75-81].

[This corrects the article DOI: 10.1016/j.slsci.

Relationship between perceived sleep and polysomnography in older adult patients.

Background And Aims: Aging is a multifactorial process that elicits changes in the duration and quality of sleep. Polysomnography is considered to be the standard examination for the analysis of sleep and consists of the simultaneous recording of selected physiological variables during sleep.

Objective: The objective of this study was to use polysomnography to compare sleep reported by senior citizens.

Brazilian consensus on guidelines for diagnosis and treatment for restless legs syndrome.

The Consensus on restless legs syndrome is an effort of neurologists from several Brazilian states, which tirelessly reviewed the literature of recent years in search of evidence, both in regard to diagnosis and treatment, according to the Oxford Centre for Evidence-based Medicine.

Polysomnographic sleep aspects in liver cirrhosis: a case control study.

Aim: To study sleep aspects and parameters in cirrhotic patients and assess the role of liver dysfunction severity in polysomnographic results.

Methods: This was a case-control study. Patients with a diagnosis of liver cirrhosis were consecutively enrolled in the study.

Oxidative stress and quality of life in elderly patients with obstructive sleep apnea syndrome: are there differences after six months of Continuous Positive Airway Pressure treatment?

Objectives: This study evaluated the effect of Continuous Positive Airway Pressure treatment on oxidative stress parameters and the quality of life of elderly patients with obstructive sleep apnea syndrome.

Methods: In total, 30 obstructive sleep apnea syndrome patients and 27 subjects without obstructive sleep apnea syndrome were included in this study. Both groups underwent quality of life and oxidative stress evaluations at baseline and after six months.

Nocturnal awakening with headache and its relationship with sleep disorders in a population-based sample of adult inhabitants of Sao Paulo City, Brazil.

Our aim was to estimate the prevalence of nocturnal awakening with headache (NAH) in the population of São Paulo City according to gender, age (20-80 years old) and socioeconomic classes and its relationship to sleep disorders, sleep parameters, anxiety, depression, fatigue, life quality and obesity. We used a population-based survey with a representative three-stage cluster sample. Questionnaires and scales were applied face-to-face, and polysomnography was performed in 1101 volunteers, aged 42 ± 14 years, 55% women.

[Minimal hepatic encephalopathy detection by neuropsychological and neurophysiological methods and the role of ammonia for its diagnosis].

Context: Minimal hepatic encephalopathy has been systematically investigated in cirrhotic patients. Although, there are controversies regarding the best methods as well as the role of ammonia for its diagnosis.

Objective: To evaluate the frequency of minimal hepatic encephalopathy diagnosed by neuropsychological and neurophysiological methods in cirrhotic patients, as well as possible associated risk factors for this condition, including the role of arterial ammonia concentrations for its diagnosis.

Placebo and modafinil effect on sleepiness in obstructive sleep apnea.

Introduction: Previous studies have evaluated the effect of modafinil on residual excessive daytime sleepiness (EDS) in patients with obstructive sleep apnea syndrome (OSAS) under effective CPAP treatment. Even though those trials also used placebo groups, we suppose that the placebo effect might influence the patients' response to modafinil.

Methods: Twenty sleepy patients with OSAS under CPAP treatment were selected.

[Sleep in psychiatric disorders].

Altered sleep patterns are prominent in the majority of psychiatric disorders. This article examines the psychiatric disorders that are most often associated to sleep dysfunction as it is related in clinical practice and describes the polysomnographic findings. Patient's main complaints are related to difficulty in initiating and maintaining sleep (initial or middle insomnia, respectively) and poor quality of sleep.

Acute neurophysiological effects of the hypnotic zolpidem in healthy volunteers.

Introduction: The imidazopyridine zolpidem is a hypnotic drug with relative selectivity for the benzodiazepine (BZP) type 1 receptor subtypes displaying a different biochemical structure to that of BZPs. Little is known of its electrophysiological effects.

Purpose: The aim of the present study was to investigate the acute neurophysiological effects of clinical oral doses of zolpidem.

Flunitrazepam-induced changes in neurophysiological, behavioural, and subjective measures used to assess sedation.

Introduction: Certain features of event-related potentials (ERPs), electroencephalographic (EEG), and behavioural measures vary with differing states of alertness and/or sedation.

Purpose: This study was conducted to investigate changes in several measures usually viewed as reflecting states of sedation/sleepiness associated with the use of a range of doses of the hypnotic benzodiazepine (BZD) flunitrazepam (FNZ).

Methods: This was a double blind, independent group design study of the effects of acute oral doses of FNZ in young healthy volunteers.