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Rebecca S Nader, Anthony L Murkar, Carlyle T Smith
Recent research has suggested that some of the inter-individual variation in sleep spindle activity is due to innate learning ability. Sleep spindles have also been observed to vary following learning in both young and older adults. We examined the effect of procedural task acquisition on sleep stages and on sleep spindles in an adolescent sample. Participants were 32 adolescents (17 females) between the ages of 12 and 19 years. Spindle activity was examined in three different frequency ranges: 11.00-13.50 Hz (slow), 13...
2016: Frontiers in Psychology
Nicola Cellini
In recent years sleep-related memory consolidation has become a central topic in the sleep research field. Several studies have shown that in healthy individuals sleep promotes memory consolidation. Notwithstanding this, the consequences of sleep disorders on offline memory consolidation remain poorly investigated. Research studies indicate that patients with insomnia, obstructive sleep apnea, and narcolepsy often exhibit sleep-related impairment in the consolidation of declarative and procedural information...
September 25, 2016: Sleep Medicine Reviews
Kenneth F Baker, Sharmila Jandial, Ben Thompson, David Walker, Ken Taylor, Helen E Foster
BACKGROUND: Structured examination routines have been developed as educational resources for musculoskeletal clinical skills teaching, including Gait-Arms-Legs-Spine (GALS), Regional Examination of the Musculoskeletal System (REMS) and paediatric GALS (pGALS). In this study, we aimed to assess the awareness and use of these examination routines in undergraduate medical teaching in UK medical schools and UK postgraduate clinical practice. METHODS: Electronic questionnaires were distributed to adult and paediatric musculoskeletal teaching leads at UK medical schools and current UK doctors in training...
October 21, 2016: BMC Medical Education
Dirk Jan Stenvers, Rick van Dorp, Ewout Foppen, Jorge Mendoza, Anne-Loes Opperhuizen, Eric Fliers, Peter H Bisschop, Johanna H Meijer, Andries Kalsbeek, Tom Deboer
Exposure to light at night (LAN) is associated with insomnia in humans. Light provides the main input to the master clock in the hypothalamic suprachiasmatic nucleus (SCN) that coordinates the sleep-wake cycle. We aimed to develop a rodent model for the effects of LAN on sleep. Therefore, we exposed male Wistar rats to either a 12 h light (150-200lux):12 h dark (LD) schedule or a 12 h light (150-200 lux):12 h dim white light (5 lux) (LDim) schedule. LDim acutely decreased the amplitude of daily rhythms of REM and NREM sleep, with a further decrease over the following days...
October 20, 2016: Scientific Reports
Ingo Fietze, Charlotte Barthe, Matthias Hölzl, Martin Glos, Sandra Zimmermann, Ralf Bauer-Diefenbach, Thomas Penzel
INTRODUCTION: Noise is one of the factors that can seriously disturb sleep, and sound volume is an important factor in this context. One strategy involves avoiding exposure to sounds in the night, while entail the minimization of background noise in a bedroom. The goal of this study was to investigate the effect of systematic sound attenuation on nocturnal sleep by influencing sound volume and reverberation within the context of room acoustics. MATERIALS AND METHODS: On this basis, we designed a randomized, controlled crossover trial investigating 24 healthy sleepers (15 men and 9 women, aged 24...
September 2016: Noise & Health
Miki Nakamura, Kazutaka Jin, Kazuhiro Kato, Hisashi Itabashi, Masaki Iwasaki, Yosuke Kakisaka, Nobukazu Nakasato
To investigate whether seizure lateralization affects sleep macrostructure in patients with left and right temporal lobe epilepsy (TLE), as rapid eye movement (REM) sleep is shorter in patients with right hemispheric cerebral infarction than with left. We retrospectively analyzed data from 16 patients with TLE (6 men and 10 women aged 34.9 ± 11.4 years) who underwent polysomnography as well as long-term video electroencephalography. Ten patients were diagnosed with left TLE and six patients with right TLE...
October 19, 2016: Neurological Sciences
Mitchell G Miglis, Srikanth Muppidi, Emmanuel During, Safwan Jaradeh
PURPOSE: Data on the prevalence of RBD in patients with PAF are limited, with discrepancies in the literature regarding prevalence. We aimed to provide further data on this association with a series of eight patients with PAF. METHODS: We reviewed the electronic medical records of all patients seen at the Stanford neurology clinics from 2012 to 2016 who were given a provisional diagnosis of PAF (343 patients), and further screened by procedure codes to identify those patients who underwent both attended video-polysomonography and autonomic testing (18 patients), and met strict exclusionary criteria (8 patients)...
October 18, 2016: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
Stephen Barlas
Generic companies press for REMS relief with Senate bill.
October 2016: P & T: a Peer-reviewed Journal for Formulary Management
Youngsin Jung, Erik K St Louis
REM sleep behavior disorder (RBD) is a common parasomnia disorder affecting between 1 and 7 % of community-dwelling adults, most frequently older adults. RBD is characterized by nocturnal complex motor behavior and polysomnographic REM sleep without atonia. RBD is strongly associated with synucleinopathy neurodegeneration. The approach to RBD management is currently twofold: symptomatic treatment to prevent injury and prognostic counseling and longitudinal follow-up surveillance for phenoconversion toward overt neurodegenerative disorders...
November 2016: Current Treatment Options in Neurology
Nicolas Fraize, Julien Carponcy, Mickaël Antoine Joseph, Jean-Christophe Comte, Pierre-Hervé Luppi, Paul-Antoine Libourel, Paul-Antoine Salin, Gaël Malleret, Régis Parmentier
STUDY OBJECTIVES: It is commonly accepted that sleep is beneficial to memory processes, but it is still unclear if this benefit originates from improved memory consolidation or enhanced information processing. It has thus been proposed that sleep may also promote forgetting of undesirable and non-essential memories, a process required for optimization of cognitive resources. We tested the hypothesis that non-rapid eye movement sleep (NREMS) promotes forgetting of irrelevant information, more specifically when processing information in working memory (WM), while REM sleep (REMS) facilitates the consolidation of important information...
October 10, 2016: Sleep
Lynn A Schroeder, Olivier Rufra, Nicolas Sauvageot, François Fays, Vannina Pieri, Nico J Diederich
STUDY OBJECTIVES: To explore rapid eye movement density (RD) in patients with idiopathic Parkinson disease (IPD) and to investigate its usefulness as surrogate marker of excessive daytime sleepiness, a frequent complaint in IPD patients. METHODS: Retrospective polysomnography study on 81 subjects without dementia: 29 patients with early-stage IPD (disease duration >3 y), 21 patients with middle- stage IPD (disease duration >3 and <8 y) and 31 healthy controls (HC)...
October 10, 2016: Sleep
Lengqiu Guo, Zhuangli Guo, Xiaoqing Luo, Rui Liang, Shui Yang, Haigang Ren, Guanghui Wang, Xuechu Zhen
Sleep, particularly rapid eye movement (REM) sleep, is implicated in the consolidation of emotional memories. In the present study, we investigated the protective effects of a phosphodiesterase 10A (PDE10A) inhibitor MP-10 on deficits in long-term fear memory induced by REM sleep deprivation (REM-SD). REM-SD caused deficits in long-term fear memory, however, MP-10 administration ameliorated the deleterious effects of REM-SD on long term fear memory. Brain-derived neurotropic factor (BDNF) and phosphorylated cAMP response element-binding protein (pCREB) were altered in specific brain regions associated with learning and memory in REM-SD rats...
October 12, 2016: Neuroscience Letters
Jaspal Singh, R K Sharma, A K Gupta
Computers are used extensively in sleep labs for polysomnography and for assistance in sleep staging. However, the test is highly inconvenient to the patient and requires availability of specially equipped sleep labs. Alternative approaches that enable unobtrusive in-home sleep staging with ECG or other signals are highly desirable. In this paper we describe a method that can be used for distinction of REM and NREM sleep stages using spectral and non-linear features of ECG derived RR interval series. To test the accuracy of the system, we extracted the RR interval series from sleep studies of 20 young healthy individuals...
September 23, 2016: Computers in Biology and Medicine
I M Madaeva, O N Berdina, N V Semenova, L A Grebenkina, V V Madaev, L I Kolesnikova
AIM: To reveal gender characteristics of the sleep structure in obstructive sleep apnea syndrome (OSAS) during polysomnographic monitoring (PSGM). SUBJECTS AND METHODS: According to the results of a pre-survey using an apnea screening questionnaire, the investigation included 58 women (body mass index (BMI), 38.2±2.1 kg/m2) and 75 men (BMI, 34.2±1.8 kg/m2), aged 50-55 years, who complained about snoring, sleep apnea, and daytime hypersomnia. Copy-pair groups were formed and compared after objectively confirming the diagnosis by PSGM made at a specialized sleep laboratory, by applying the GRASS-TELEFACTOR Twin PSG system (Comet) with an integrated SPM-1 sleep module (USA) in accordance with the standard procedure...
2016: Terapevticheskiĭ Arkhiv
Udaya Seneviratne, Ray C Boston, Mark Cook, Wendyl D'Souza
OBJECTIVE: We sought to investigate the temporal patterns and sleep-wake cycle-related epileptiform discharges (EDs) in genetic generalized epilepsies (GGEs). METHODS: We studied 24-hour ambulatory electroencephalography (EEG) recordings of patients with GGE, diagnosed and classified according to the International League against Epilepsy criteria. We manually coded the type of discharge, time of occurrence, duration, and arousal state of each ED. We employed mixed effects Poisson regression modeling to study the temporal distribution of epileptiform discharges...
October 7, 2016: Epilepsy & Behavior: E&B
K A Waters, A Lowe, P Cooper, S Vella, Hiran Selvadurai
BACKGROUND: In Cystic Fibrosis (CF), early detection and treatment of respiratory disease is considered the standard for respiratory care. Overnight polysomnography (PSG) may help identify respiratory deterioration in young patients with CF. METHODS: A prospective cohort study of 46 patients with CF, aged 8-12years, from a specialist clinic in a tertiary paediatric hospital. Daytime pulmonary function, shuttle test exercise testing and overnight PSG were studied...
October 8, 2016: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
Tamara Shiner, Anat Mirelman, Mali Gana Weisz, Anat Bar-Shira, Elissa Ash, Ron Cialic, Naomi Nevler, Tanya Gurevich, Noa Bregman, Avi Orr-Urtreger, Nir Giladi
Importance: Mutations in the glucocerebrosidase (GBA) gene are a risk factor for the development of dementia with Lewy bodies (DLB). These mutations are common among Ashkenazi Jews (AJ) and appear to have an effect on the natural history of the disease. Objectives: To evaluate the clinical and genetic characteristics of an AJ cohort of patients diagnosed with DLB, assess the association of phenotype of DLB with GBA mutations, and explore the effects of these mutations on the clinical course of the disease...
October 10, 2016: JAMA Neurology
N A Amosova, I G Smolentseva, P M Guseinova, O A Maslyuk, E L Gavrilov
Disorders of sleep and wakefulness occur in about 60-98% of patients with Parkinson's disease (PD). The majority of research on the scale and nature of the disorders was performed in patients treated with antiparkinsonian drugs, and, therefore, the true picture of sleep disorders was interfering with side effects of therapy. The spectrum of these disorders in PD patients is broad and includes insomnia, parasomnia and hypersomnia. The main symptoms of insomnia are difficulty in maintaining sleep, associated with nocturia, rapid eye movement (REM) sleep behavior disorder (RBD), night cramps, akinesia and tremor...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
Christian M Horvath, Stephan Zbinden, Sebastian R Ott, Anne-Kathrin Brill
A 43-year-old man was referred to our tertiary sleep center for the initiation of sleep apnea treatment. A prior diagnostic overnight polysomnography (Fig 1) had revealed an apnea-hypopnea index (AHI) of 22/h of sleep. The apneas were predominantly central (central AHI, 18.2/h; obstructive AHI, 3.8/h), more pronounced in the supine position (AHI supine, 36.6/h; AHI nonsupine, 11/h) and during non-rapid eye movement (non-REM) sleep (REM, 15.8/h; non-REM, 23.5/h). A continuous positive airway pressure (CPAP) trial in an outpatient setting had failed, as the fixed CPAP of 11 cm H2O was not tolerated by the patient because of a feeling of lightheadedness when wearing the mask...
October 2016: Chest
Brian N Palen, Lucas M Donovan, Elizabeth C Parsons
A 56-year-old obese female with depression was referred for evaluation of snoring, witnessed apneas, and daytime fatigue. Prescribed medications included bupropion and sertraline. Split-night polysomnography was performed. The diagnostic portion revealed total sleep time of 112 minutes, the absence of REM sleep, and an apnea-hypopnea index (AHI) of 54 events per hour. Continuous positive airway pressure (PAP) titration was then initiated starting at 5 cm H2O. At a pressure of approximately 12 cm H2O, the patient entered a long uninterrupted period of REM sleep lasting 140 minutes (Fig...
September 29, 2016: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
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