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https://www.readbyqxmd.com/read/29667182/breathing-regulation-and-blood-gas-homeostasis-after-near-complete-lesions-of-the-retrotrapezoid-nucleus-in-adult-rats
#1
George M P R Souza, Roy Kanbar, Daniel S Stornetta, Stephen B G Abbott, Ruth L Stornetta, Patrice G Guyenet
The retrotrapezoid nucleus (RTN) is one of several CNS nuclei that contribute, in various capacities (e.g. CO2 detection, neuronal modulation) to the central respiratory chemoreflex (CRC). Here we test how important the RTN is to PCO2 homeostasis and breathing during sleep or wake. RTN Nmb positive neurons were killed with targeted microinjections of substance-P-saporin conjugate in adult rats. Under normoxia, rats with large RTN lesions (92 ± 4 % cell loss) had normal blood pressure (BP) and arterial pH but were hypoxic (-8 mmHg PaO2 ) and hypercapnic (+10 mmHg PaCO2 )...
April 18, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29665124/how-does-dementia-with-lewy-bodies-start-prodromal-cognitive-changes-in-rem-sleep-behavior-disorder
#2
Daphné Génier Marchand, Ronald B Postuma, Frédérique Escudier, Jessie De Roy, Amélie Pelletier, Jacques Montplaisir, Jean-François Gagnon
Objective We describe the progression of cognitive decline and identify the predictive values of cognitive tests in three groups of REM sleep behavior disorder (RBD) patients classified at their last follow-up as having Parkinson's disease (PD), dementia with Lewy bodies (DLB), or still-idiopathic. Methods Patients (n=109) underwent polysomnographic, neurological, and neuropsychological assessments. We used linear mixed-model analyses to compare the progression of cognitive test performance between the three groups over a three-year prodromal period, and performed linear regressions for a six-year prodromal period...
April 17, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29664048/effect-of-rapid-eye-movement-sleep-behavior-disorder-on-obstructive-sleep-apnea-severity-and-cognition-of-parkinson-s-disease-patients
#3
Jun-Ying Huang, Jin-Ru Zhang, Yun Shen, Hui-Jun Zhang, Yu-Lan Cao, Cheng-Jie Mao, Ya-Ping Yang, Jing Chen, Chun-Feng Liu, Jie Li
Background: Rapid eye movement (REM) sleep behavior disorder (RBD) and obstructive sleep apnea (OSA) are the most common sleep disorders in Parkinson's disease (PD). The aim of this study was to identify whether RBD could alleviate OSA severity in PD patients and its effect on cognitive impairment. Methods: From February 2014 to May 2017, we recruited 174 PD patients from the Second Affiliated Hospital of Soochow University, all of whom underwent polysomnography (PSG)...
April 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29660578/implementing-the-risk-of-endometrial-malignancy-algorithm-rem-adding-obesity-as-a-predictive-factor-results-of-rem-b-in-a-single-center-survey
#4
Francesco Plotti, Stella Capriglione, Giuseppe Scaletta, Daniela Luvero, Salvatore Lopez, Francesca Fiori Nastro, Corrado Terranova, Carlo De Cicco Nardone, Roberto Montera, Roberto Angioli
OBJECTIVE: In 2013, our group assessed a risk stratification tool of endometrial cancer (EC), called REM (Risk of Endometrial Malignancy). A well known risk factor for EC is body mass index (BMI). In fact, (BMI > 30 and <35 kg/m2) and severe obesity (BMI > 35 kg/m2) were associated with a 2.6-fold and a 4.7-fold increase in EC risk, respectively. Therefore, in the present study we aim to improve the performance of REM, including BMI and developing a new scoring system, called REM-B (Risk of Endometrial Malignancy score associated to BMI), to classify patients into high risk or low risk groups for EC...
April 7, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29660400/hippocampal-coupling-with-cortical-and-subcortical-structures-in-the-context-of-memory-consolidation
#5
Ivan Skelin, Scott Kilianski, Bruce L McNaughton
Memory consolidation is a gradual process through which episodic memories become incorporated into long-term 'semantic' representations. It likely involves reactivation of neural activity encoding the recent experience during non-REM sleep. A critical prerequisite for memory consolidation is precise coordination of reactivation events between the hippocampus and cortical/subcortical structures, facilitated by the coupling of local field potential (LFP) oscillations (slow oscillations, sleep spindles and sharp wave/ripples) between these structures...
April 13, 2018: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29655763/sleeping-oxygen-saturation-rapid-eye-movement-sleep-and-the-adaptation-of-postprandial-metabolic-function-in-insulin-sensitive-and-resistant-individuals-without-diabetes
#6
Karin A Garcia, William K Wohlgemuth, Ele Ferrannini, Andrea Mari, Alex Gonzalez, Armando J Mendez, Roberto Bizzotto, Jay S Skyler, Neil Schneiderman, Barry E Hurwitz
AIMS: Sleeping oxygen saturation (SaO2 ) and sleep stage duration have been linked with prediabetic alterations but the pathogenic pathways are not well understood. This study of insulin sensitive and resistant adults examined the effect on postprandial metabolic regulation of repeated mixed-meal challenges of different carbohydrate loading. The aim was to examine whether the relationship between lower sleeping oxygen saturation (SaO2 ) and poorer fasting and postprandial metabolic function may be linked with reduced slow wave sleep (SWS) and rapid eye movement (REM) duration, independent of age, sex and total adiposity...
April 12, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29652904/first-night-effect-on-sleep-time-in-dairy-cows
#7
Emma Ternman, Matti Pastell, Laura Hänninen, Sigrid Agenäs, Per P Nielsen
In human sleep studies, the probability of discomfort from the electrodes and the change in environment usually results in first-night recordings being discarded. Sleep recordings from the first night in human subjects often differ in amount of REM (rapid eye movement) sleep and the overall sleep architecture. This study investigated whether recordings of sleep states in dairy cows also show a first-night effect. Non-invasive electrophysiological recordings were carried out on nine cows of the Swedish Red breed during three consecutive 24-hour periods (recording days 1-3)...
2018: PloS One
https://www.readbyqxmd.com/read/29651015/author-correction-rem-sleep-respiratory-behaviours-match-mental-content-in-narcoleptic-lucid-dreamers
#8
Delphine Oudiette, Pauline Dodet, Nahema Ledard, Emilie Artru, Inès Rachidi, Thomas Similowski, Isabelle Arnulf
A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has been fixed in the paper.
April 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29644271/venlafaxine-induced-rem-sleep-behavioral-disorder-presenting-as-two-fractures
#9
R Ryan Williams, Gustavo Sandigo
Rapid eye movement (REM) sleep behavioral disorder is characterized by the absence of muscular atonia during REM sleep. In this disorder, patients can violently act out their dreams, placing them at risk for traumatic fractures during these episodes. REM sleep behavioral disorder (RBD) can be a sign of future neurodegenerative disease and has also been found to be a side effect of certain psychiatric medications. We present a case of venlafaxine-induced RBD in a 55 year old female who presented with a 13 year history of intermittent parasomnia and dream enactment in addition to a recent history of two fractures requiring intervention...
October 2017: Trauma Case Reports
https://www.readbyqxmd.com/read/29643442/author-correction-eeg-transients-in-the-sigma-range-during-non-rem-sleep-predict-learning-in-dogs
#10
Ivaylo Borislavov Iotchev, Anna Kis, Róbert Bódizs, Gilles van Luijtelaar, Enikő Kubinyi
A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.
April 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29628334/consolidative-mechanisms-of-emotional-processing-in-rem-sleep-and-ptsd
#11
REVIEW
Anthony L A Murkar, Joseph De Koninck
Research suggests sleep plays a role in the consolidation of recently acquired memories for long-term storage. rapid eye movement (REM) sleep has been shown to play a complex role in emotional-memory processing, and may be involved in subsequent waking-day emotional reactivity and amygdala responsivity. Interaction of the hippocampus and basolateral amygdala with the medial-prefrontal cortex is associated with sleep-dependent learning and emotional memory processing. REM is also implicated in post-traumatic stress disorder (PTSD), which is characterized by sleep disturbance, heightened reactivity to fearful stimuli, and nightmares...
March 15, 2018: Sleep Medicine Reviews
https://www.readbyqxmd.com/read/29625116/neuropeptide-y-npy-or-cocaine-and-amphetamine-regulated-transcript-cart-fiber-innervation-on-central-and-medial-amygdaloid-neurons-that-project-to-the-locus-coeruleus-and-dorsal-raphe-in-the-rat
#12
Young G Hwang, Hyun S Lee
The amygdaloid nuclear complex has been linked to the regulation of emotional behavior and energy regulation in that emotional stress might cause either reduction or enhancement of eating. We examined hypothalamic neuronal origin of feeding/arousal-related peptidergic fibers containing cocaine- and amphetamine-regulated transcript (CART) and neuropeptide Y (NPY) located in the rat amygdala along with its efferent projections to the brainstem monoaminergic nuclei. First, central (CeA) as well as medial (MeA) amygdala, among several amygdaloid subdivisions, exhibited the most prominent NPY or CART immunostaining which consisted of a substantial number of somata as well as labeled fibers...
April 3, 2018: Brain Research
https://www.readbyqxmd.com/read/29624773/sleep-disorders-in-spinocerebellar-ataxia-type-10
#13
Ester London, Carlos H F Camargo, Alessandra Zanatta, Ana C Crippa, Salmo Raskin, Renato P Munhoz, Tetsuo Ashizawa, Hélio A G Teive
As sleep disturbances have been reported in spinocerebellar ataxias (SCAs), including types SCA1, SCA2, SCA3, SCA6 and SCA13, identification and management of these disturbances can help minimise their impact on SCA patients' overall body functions and quality of life. To our knowledge, there are no studies that investigate sleep disturbances in SCA10. Therefore, the aim of this study was to assess sleep disturbances in patients with SCA10. Twenty-three SCA10 patients and 23 healthy controls were recruited...
April 6, 2018: Journal of Sleep Research
https://www.readbyqxmd.com/read/29620019/a-comparison-of-probabilistic-classifiers-for-sleep-stage-classification
#14
Pedro Fonseca, Niek den Teuling, Xi Long, Ronald M Aarts
To compare conditional random fields (CRF), hidden Markov models (HMMs) and Bayesian linear discriminants (LDs) for cardiorespiratory sleep stage classification on a five-class sleep staging task (Wake/N1/N2/N3/REM), to explore the benefit of incorporating time information in the classification and to evaluate the feasibility of sleep staging on obstructive sleep apnea (OSA) patients.&#13; Approach: The classifiers with and without time information were evaluated with 10-fold cross-validation on five-, four- (Wake/N1+N2/N3/REM) and three-class (Wake/NREM/REM) classification tasks using a data set comprising 443 night-time polysomnography (PSG) recordings of 231 participants (180 healthy participants, 100 of which with a 'regular' sleep architecture, and 51 participants previously diagnosed with OSA)...
April 5, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29618627/baseline-symptoms-and-basal-forebrain-volume-predict-future-psychosis-in-early-parkinson-disease
#15
Matthew J Barrett, Jamie C Blair, Scott A Sperling, Mark E Smolkin, T Jason Druzgal
OBJECTIVE: Determining baseline predictors of future psychosis in Parkinson disease (PD) may identify those at risk for more rapidly progressive disease, i.e., a more malignant PD subtype. METHODS: This cohort study evaluated 423 patients with newly diagnosed PD collected as part of the Parkinson's Progression Markers Initiative. Psychotic symptoms were assessed with the Movement Disorders Society-Unified Parkinson Disease Rating Scale item 1.2, which assesses hallucinations and psychosis over the past week...
April 4, 2018: Neurology
https://www.readbyqxmd.com/read/29618134/melanin-concentrating-hormone-expressing-neurons-adjust-slow-wave-sleep-dynamics-to-catalyze-paradoxical-rem-sleep
#16
Christophe Varin, Pierre-Hervé Luppi, Patrice Fort
Study Objectives: Experimental studies over the last fifteen years established a role in sleep of the tuberal hypothalamic neurons that express melanin-concentrating hormone (MCH). Controversies still remain regarding their actual contribution to both slow-wave sleep (SWS) and paradoxical sleep (PS aka REM sleep) or PS alone. Methods: To address this point, we compared effects of chemogenetic activation and inhibition of MCH neurons on SWS and PS amounts and EEG rhythmic activities in transgenic Pmch-cre mice...
March 29, 2018: Sleep
https://www.readbyqxmd.com/read/29617218/computational-model-of-brainstem-circuit-for-state-dependent-control-of-hypoglossal-motoneurons
#17
Mohsen Naji, Maxim Komarov, Giri P Krishnan, Atul Malhotra, Frank L Powell, Irma Rukhadze, Victor B Fenik, Maxim Bazhenov
In patients with obstructive sleep apnea (OSA) the pharyngeal muscles become relaxed during sleep, which leads to a partial or complete closure of upper airway. Experimental studies suggest that withdrawal of noradrenergic and serotonergic drives importantly contribute to depression of hypoglossal motoneurons and, therefore, may contribute to OSA pathophysiology; however, specific cellular and synaptic mechanisms remain unknown. In this new study, we developed a biophysical network model to test the hypothesis that, in order to explain experimental observations, the neuronal network for monoaminergic control of excitability of hypoglossal motoneurons needs to include excitatory and inhibitory perihypoglossal interneurons that mediate noradrenergic and serotonergic drives to hypoglossal motoneurons...
April 4, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29614906/effect-of-rapid-eye-movement-related-obstructive-sleep-apnea-on-adherence-to-continuous-positive-airway-pressure
#18
Tetsuro Hoshino, Ryujiro Sasanabe, Tohru Tanigawa, Kenta Murotani, Mariko Arimoto, Hiromi Ueda, Toshiaki Shiomi
Objective Rapid eye movement (REM)-related obstructive sleep apnea (OSA) is characterized by respiratory events such as apnea and hypopnea predominately or exclusively during REM sleep. Several studies have revealed clinical predictors of adherence to the use of continuous positive airway pressure (CPAP). However, the effect of REM-related OSA on adherence to CPAP use remains unclear. Therefore, we investigated the effects of REM-related OSA on adherence to CPAP use 6 months after treatment initiation. Methods We enrolled 161 patients in this study and divided them into 3 groups: the good adherence, poor adherence, and dropout groups...
January 1, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/29602910/neurocognition-sleep-and-pet-findings-in-type-2-vs-type-1-narcolepsy
#19
Yu-Shu Huang, Ing-Tsung Hsiao, Feng-Yuan Liu, Fang-Ming Hwang, Kuang-Lin Lin, Wen-Cheng Huang, Christian Guilleminault
OBJECTIVE: To analyze differences in functional brain images collected in patients with type 2 and type 1 narcolepsy compared to normal controls and the relationship among brain images, objective Neuropsychologic tests, and sleep findings. METHODS: Data collection included comprehensive clinical investigation, study of sleep/wake with actigraphy, polysomnography, Multiple Sleep Latency Test, human leukocyte antigen typing,18 F-fluorodeoxyglucose PET, and cognitive tests obtained from 29 patients with type 2 narcolepsy, 104 patients with type 1 narcolepsy, and 26 sex- and age-matched normal control individuals...
March 30, 2018: Neurology
https://www.readbyqxmd.com/read/29597138/rapid-eye-movement-sleep-behavior-disorder-or-epileptic-seizure-during-sleep-a-video-analysis-of-motor-events
#20
Vi-Huong Nguyen-Michel, Ovidio Solano, Smaranda Leu-Semenescu, Aurélie Pierre-Justin, Ana Gales, Vincent Navarro, Michel Baulac, Claude Adam, Sophie Dupont, Isabelle Arnulf
PURPOSE: To compare the motor semiology of sleep behavior disorder (RBD) during rapid eye movement (REM) with epileptic seizures in non-REM and REM sleep. METHODS: We analyzed the types and frequency of motor events from videos of patients with RBD (n = 15, mean age 64.8 years, 179 motor episodes) and patients with epilepsy (n = 15, mean age 34.4 years, 87 sleep-related epileptic seizures including 34 during REM sleep). RESULTS: Patients with sleep-related epileptic seizures more often woke up abruptly (28% vs...
March 21, 2018: Seizure: the Journal of the British Epilepsy Association
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