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https://www.readbyqxmd.com/read/29321233/effect-of-psychostimulants-on-blood-pressure-profile-and-endothelial-function-in-narcolepsy
#1
Adriana Bosco, Régis Lopez, Lucie Barateau, Sofiene Chenini, Carole Pesenti, Jean-Louis Pépin, Isabelle Jaussent, Yves Dauvilliers
OBJECTIVE: To assess the effect of psychostimulant treatments on the 24-hour blood pressure (BP) profile of patients with narcolepsy type 1 (NT1). METHODS: Heart rate (HR) and BP were monitored for 24 hours and morning endothelial function was evaluated in 160 consecutive patients with NT1: 68 untreated (41 male, median age 34.9 years), 54 treated (32 male, median age 40.9 years), and 38 evaluated twice (21 male, median age 32 years), before and during treatment...
January 10, 2018: Neurology
https://www.readbyqxmd.com/read/29221779/effect-of-sodium-oxybate-modafinil-and-their-combination-on-disrupted-nighttime-sleep-in-narcolepsy
#2
Yves Dauvilliers, Thomas Roth, Diane Guinta, Sarah Alvarez-Horine, Efim Dynin, Jed Black
OBJECTIVE: To assess the effects of three narcolepsy treatment modalities on sleep stage shifts associated with disrupted nighttime sleep (DNS) using data from a clinical trial. METHODS: Polysomnograms were reviewed from 155 patients (who had these data available at baseline and 8 weeks) of the 278 patients who were randomized to placebo, 9-g sodium oxybate (SXB)/nightly, 200-600 mg/d modafinil, or SXB + modafinil. Major outcomes of these post hoc analyses, analyzed using analysis of covariance, were change from baseline in number of shifts from Stages N2/3/rapid eye movement (REM) to Stage N1/Wake, and from Stage N1/Wake to REM...
December 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29186205/narcolepsy-susceptibility-gene-ccr3-modulates-sleep-wake-patterns-in-mice
#3
Hiromi Toyoda, Yoshiko Honda, Susumu Tanaka, Taku Miyagawa, Makoto Honda, Kazuki Honda, Katsushi Tokunaga, Tohru Kodama
Narcolepsy is caused by the loss of hypocretin (Hcrt) neurons and is associated with multiple genetic and environmental factors. Although abnormalities in immunity are suggested to be involved in the etiology of narcolepsy, no decisive mechanism has been established. We previously reported chemokine (C-C motif) receptor 3 (CCR3) as a novel susceptibility gene for narcolepsy. To understand the role of CCR3 in the development of narcolepsy, we investigated sleep-wake patterns of Ccr3 knockout (KO) mice. Ccr3 KO mice exhibited fragmented sleep patterns in the light phase, whereas the overall sleep structure in the dark phase did not differ between Ccr3 KO mice and wild-type (WT) littermates...
2017: PloS One
https://www.readbyqxmd.com/read/29161567/the-biology-of-rem-sleep
#4
REVIEW
John Peever, Patrick M Fuller
Considerable advances in our understanding of the mechanisms and functions of rapid-eye-movement (REM) sleep have occurred over the past decade. Much of this progress can be attributed to the development of new neuroscience tools that have enabled high-precision interrogation of brain circuitry linked with REM sleep control, in turn revealing how REM sleep mechanisms themselves impact processes such as sensorimotor function. This review is intended to update the general scientific community about the recent mechanistic, functional and conceptual developments in our current understanding of REM sleep biology and pathobiology...
November 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29145189/rem-sleep-behavior-disorder
#5
Claudio L Bassetti, Panagiotis Bargiotas
Rapid eye movement sleep behavior disorder (RBD) is a brain disorder, characterized by the dream enactment during rapid eye movement (REM) sleep due to a lack of physiologic muscle atonia and increased muscle twitching. Schenk was the first to describe this disorder in 1986; however, few authors reported in the 1970-1980s loss of physiological muscle atonia combined with dream enactment in the course of brainstem disorders and as a consequence of alcoholism and antidepressant treatment. RBD affects less than 1% of the adult population, but can be found in up to 25-50% of neurodegenerative disorders including Parkinson's disease, multisystem atrophy, and dementia with Lewy body...
2018: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/29099966/test-retest-reliability-of-the-multiple-sleep-latency-test-in-central-disorders-of-hypersomnolence
#6
Régis Lopez, Anis Doukkali, Lucie Barateau, Elisa Evangelista, Sofiene Chenini, Isabelle Jaussent, Yves Dauvilliers
Study objectives: To assess the test-retest reliability of the polysomnography-multiple sleep latency test (PSG-MSLT) diagnostic classification and measures, and to study the determinants of its variability in patients with narcolepsy type 1 (NT1) or with non-cataplectic central disorders of hypersomnolence (NCHS): type 2 (NT2), idiopathic hypersomnia (IH) and unspecified hypersomnolence (UnsEDS). Methods: PSG-MSLT in drug-free conditions was administered twice (median interval of 1...
November 1, 2017: Sleep
https://www.readbyqxmd.com/read/29069490/optimizing-mslt-specificity-in-narcolepsy-with-cataplexy
#7
T Murer, L L Imbach, M Hackius, R N Taddei, E Werth, R Poryazova, Y V Gavrilov, S Winkler, D Waldvogel, C R Baumann, P O Valko
Objective: Multiple sleep onset rapid eye movement (R) periods (SOREMPs) and a mean sleep latency ≤8min on the multiple sleep latency test (MSLT) are diagnostic criteria of narcolepsy (NC), but occur also in other conditions with increased sleep pressure, including insufficient sleep syndrome (ISS), sleep disordered breathing (SDB) or Parkinson's disease (PD). These false positives are common, may create diagnostic uncertainty, and highlight the need for complementary MSLT measures with high specificity for narcolepsy...
October 23, 2017: Sleep
https://www.readbyqxmd.com/read/29029348/dysregulation-of-sleep-behavioral-states-in-narcolepsy
#8
Sarah F Schoch, Esther Werth, Rositsa Poryazova, Thomas E Scammell, Christian R Baumann, Lukas L Imbach
Study Objectives: Patients with narcolepsy suffer from poor maintenance of wakefulness and fragmented night sleep, but the underlying mechanism of sleep boundary dysregulation remains little understood. The goal of this study was to quantify abnormal sleep-wake regulation in narcolepsy patients. Methods: Using a model-based approach (state space analysis), we analyzed overnight EEG recordings in ten patients with narcolepsy type 1 and age- and gender-matched healthy control subjects...
October 5, 2017: Sleep
https://www.readbyqxmd.com/read/29019051/the-link-between-narcolepsy-and-autonomic-cardiovascular-dysfunction-a-translational-perspective
#9
REVIEW
Chiara Berteotti, Alessandro Silvani
Narcolepsy is a rare disease that entails excessive daytime sleepiness, often associated with sudden episodes of muscle weakness known as cataplexy. Narcolepsy with cataplexy (NC) is due to the loss of hypothalamic neurons that release the neuropeptides orexin A and B. Orexin neuron projections prominently target brain structures involved in wake-sleep state switching and the central autonomic network. This review provides an updated summary of the links between NC and autonomic cardiovascular dysfunction from a translational perspective...
October 10, 2017: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
https://www.readbyqxmd.com/read/28956242/polysomnographic-findings-in-craniopharyngioma-patients
#10
Line Pickering, Marianne Klose, Ulla Feldt-Rasmussen, Poul Jennum
PURPOSE: The purpose of this study is to evaluate whether damage to the hypothalamus due to craniopharyngioma or consequent surgery may involve the sleep-wake regulatory system, resulting in sleep disturbances and sleepiness. METHODS: Seven craniopharyngioma patients and 10 healthy controls were evaluated with sleep questionnaires including the Epworth Sleepiness Scale, polysomnography, and a multiple sleep latency test (MSLT). Five patients and eight controls had lumbar puncture performed to determine hypocretin-1 levels...
September 27, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28899330/rem-sleep-behaviour-disorder-not-just-a-bad-dream
#11
REVIEW
Elie Matar, Simon Jg Lewis
Rapid eye movement (REM) sleep behaviour disorder (RBD) is a parasomnia characterised by the loss of the normal atonia during the REM stage of sleep, resulting in overt motor behaviours that usually represent the enactment of dreams. Patients will seek medical attention due to sleep-related injuries or unpleasant dream content. Idiopathic RBD which occurs independently of any other disease occurs in up to 2% of the older population. Meanwhile, secondary RBD is very common in association with certain neurodegenerative conditions...
September 18, 2017: Medical Journal of Australia
https://www.readbyqxmd.com/read/28777180/sleep-wake-disorders-of-childhood
#12
Suresh Kotagal
PURPOSE OF REVIEW: Sleep-wake disorders occur in 10% to 28% of children and differ somewhat in pathophysiology and management from sleep-wake disorders in adults. This article discusses the diagnosis and management of key childhood sleep disorders. RECENT FINDINGS: The role of sleep in memory consolidation and in the facilitation of learning has been increasingly recognized, even at the toddler stage. Cataplexy, a key feature of narcolepsy type 1, may be subtle in childhood and characterized by transient muscle weakness isolated to the face...
August 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28777171/diagnostic-approach-and-investigation-in-sleep-medicine
#13
Michael H Silber
PURPOSE OF REVIEW: This article provides a clinical approach to the appropriate investigation and diagnosis of sleep disorders commonly seen by neurologists. RECENT FINDINGS: Home sleep apnea testing in appropriate situations can replace laboratory polysomnography in many cases of uncomplicated sleep apnea. Multiple sleep latency tests must be performed meticulously and interpreted in the clinical setting to avoid overdiagnoses of narcolepsy. Human leukocyte antigen testing has limited utility in establishing a diagnosis of narcolepsy because a positive test has low specificity...
August 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28777170/brain-circuitry-controlling-sleep-and-wakefulness
#14
Richard L Horner, John H Peever
PURPOSE OF REVIEW: This article outlines the fundamental brain mechanisms that control sleep-wake patterns and reviews how pathologic changes in these control mechanisms contribute to common sleep disorders. RECENT FINDINGS: Discrete but interconnected clusters of cells located within the brainstem and hypothalamus comprise the circuits that generate wakefulness, non-rapid eye movement (non-REM) sleep, and REM sleep. These clusters of cells use specific neurotransmitters, or collections of neurotransmitters, to inhibit or excite their respective sleep- and wake-promoting target sites...
August 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28691719/narcolepsy-type-1-and-hypersomnia-associated-with-a-psychiatric-disorder-show-different-slow-wave-activity-dynamics
#15
Ewa Walacik-Ufnal, Anna Justyna Piotrowska, Dorota Wołyńczyk-Gmaj, Piotr Januszko, Bartłomiej Gmaj, Marcin Ufnal, Marek Kabat, Marcin Wojnar
The aim of the study was to compare electrophysiological parameters of night sleep in narcolepsy type 1 and hypersomnia associated with a psychiatric disorder. Fortyfour patients: 15 with narcolepsy type 1, 14 with hypersomnia associated with a psychiatric disorder and 15 age- and sex-matched controls participated in the study. The study subjects filled in the Athens Insomnia Scale (AIS) and the Beck Depression Inventory (BDI). The severity of daytime sleepiness was quantified subjectively using the Epworth Sleepiness Scale (ESS) and the Stanford Sleepiness Scale (SSS), and objectively using the Multiple Sleep Latency Test (MSLT)...
2017: Acta Neurobiologiae Experimentalis
https://www.readbyqxmd.com/read/28680929/orexins-and-the-cardiovascular-events-of-awakening
#16
REVIEW
Alessandro Silvani
This brief review aims to provide an updated account of the cardiovascular events of awakening, proposing a testable conceptual framework that links these events with the neural control of sleep and the autonomic nervous system, with focus on the hypothalamic orexin (hypocretin) neurons. Awakening from non-rapid-eye-movement sleep entails coordinated changes in brain and cardiovascular activity: the neural "flip-flop" switch that governs state transitions becomes biased toward the ascending arousal systems, arterial blood pressure and heart rate rise toward waking values, and distal skin temperature falls...
2017: Temperature: Multidisciplinary Biomedical Journal
https://www.readbyqxmd.com/read/28675258/narcolepsy-cataplexy-and-psychosis-a-case-study
#17
F Canellas-Dols, C Delgado, C Arango-Lopez, R Peraita-Adrados
AIMS: To report a challenging patient a girl who developed narcolepsyy with cataplexy (NT1) and a psychosis during adolescence. To discuss diagnostic and therapeutic challenges of the comorbid cases. CASE REPORT: A 14-year-old girl was referred to Sleep and Epilepsy Unit for excessive daytime sleepiness, impaired nocturnal sleep, binge eating and weight gain, over the last year. After being diagnosed with a NT1 the patient was treated with modafinil and sodium oxybate...
July 16, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28656632/serum-brain-derived-neurotrophic-factor-bdnf-in-sleep-disordered-patients-relation-to-sleep-stage-n3-and-rapid-eye-movement-rem-sleep-across-diagnostic-entities
#18
Michael Deuschle, Michael Schredl, Christian Wisch, Claudia Schilling, Maria Gilles, Olga Geisel, Rainer Hellweg
Experimental and clinical evidence suggests an association between neuroplasticity, brain-derived neurotrophic factor and sleep. We aimed at testing the hypotheses that brain-derived neurotrophic factor is associated with specific aspects of sleep architecture or sleep stages in patients with sleep disorders. We included 35 patients with primary insomnia, 31 patients with restless legs syndrome, 17 patients with idiopathic hypersomnia, 10 patients with narcolepsy and 37 healthy controls. Morning serum brain-derived neurotrophic factor concentrations were measured in patients and controls...
June 28, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28619175/sodium-oxybate-treatment-in-narcolepsy-and-its-effect-on-muscle-tone
#19
Geert Mayer, Andrea Rodenbeck, Karl Kesper
AIMS: To estimate the effect of the compound sodium oxybate (SO) on chin muscle tone in sleep, a re-analysis of the results of the international multicenter study SXB-15 was performed, applying a validated semi-automatic analysis of muscle tone. This analysis distinguishes short (<0.5 s) and long (>0.5 s) muscle activity indices per hour (SMI, LMI) in 116 patients with narcolepsy-cataplexy. While stable stimulant medication was permitted, tricyclics and SSRIs were withdrawn. Polysomnographies were performed at baseline (V5), four weeks after titration of SO to 4...
July 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28522097/sleep-spindle-density-in-narcolepsy
#20
Julie Anja Engelhard Christensen, Miki Nikolic, Mathias Hvidtfelt, Birgitte Rahbek Kornum, Poul Jennum
BACKGROUND: Patients with narcolepsy type 1 (NT1) show alterations in sleep stage transitions, rapid-eye-movement (REM) and non-REM sleep due to the loss of hypocretinergic signaling. However, the sleep microstructure has not yet been evaluated in these patients. We aimed to evaluate whether the sleep spindle (SS) density is altered in patients with NT1 compared to controls and patients with narcolepsy type 2 (NT2). METHODS: All-night polysomnographic recordings from 28 NT1 patients, 19 NT2 patients, 20 controls (C) with narcolepsy-like symptoms, but with normal cerebrospinal fluid hypocretin levels and multiple sleep latency tests, and 18 healthy controls (HC) were included...
June 2017: Sleep Medicine
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