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https://www.readbyqxmd.com/read/29345542/effects-of-late-night-training-on-slow-wave-sleep-episode-and-hour-by-hour-derived-nocturnal-cardiac-autonomic-activity-in-female-soccer-players
#1
Júlio A Costa, João Brito, Fábio Y Nakamura, Eduardo M Oliveira, António N Rebelo
PURPOSE: To assess the sensitivity of nocturnal heart rate variability (HRV) monitoring methods to the effects of late-night soccer training sessions in female athletes. METHODS: Eleven female soccer players competing in the 1st division of the Portuguese soccer league wore HR monitors during night-sleep throughout a one-week competitive in-season microcycle, after late-night training sessions (n = 3) and rest days (n = 3). HRV was analyzed through "slow-wave sleep episode" (SWSE; 10 min duration) and "hour-by-hour" (all the RR intervals recorded throughout the hours of sleep)...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29327337/generalized-nonmotor-absence-seizures-what-do-absence-generalized-and-nonmotor-mean
#2
REVIEW
Iris Unterberger, Eugen Trinka, Peter W Kaplan, Gerald Walser, Gerhard Luef, Gerhard Bauer
OBJECTIVE: Clinical absences are now classified as "generalized nonmotor (absence) seizures" by the International League Against Epilepsy (ILAE). The aim of this paper is to critically review the concept of absences and to put the accompanying focal and motor symptoms into the context of the emerging pathophysiological knowledge. METHODS: For this narrative review we performed an extensive literature search on the term "absence," and analyzed the plethora of symptoms observed in clinical absences...
January 11, 2018: Epilepsia
https://www.readbyqxmd.com/read/29321683/dual-function-of-thalamic-low-vigilance-state-oscillations-rhythm-regulation-and-plasticity
#3
REVIEW
Vincenzo Crunelli, Magor L Lőrincz, William M Connelly, François David, Stuart W Hughes, Régis C Lambert, Nathalie Leresche, Adam C Errington
During inattentive wakefulness and non-rapid eye movement (NREM) sleep, the neocortex and thalamus cooperatively engage in rhythmic activities that are exquisitely reflected in the electroencephalogram as distinctive rhythms spanning a range of frequencies from <1 Hz slow waves to 13 Hz alpha waves. In the thalamus, these diverse activities emerge through the interaction of cell-intrinsic mechanisms and local and long-range synaptic inputs. One crucial feature, however, unifies thalamic oscillations of different frequencies: repetitive burst firing driven by voltage-dependent Ca2+ spikes...
February 2018: Nature Reviews. Neuroscience
https://www.readbyqxmd.com/read/29321408/the-factors-affecting-the-non-dipper-pattern-in-japanese-patients-with-severe-obstructive-sleep-apnea
#4
Hiromitsu Sekizuka, Naohiko Osada, Yoshihiro J Akashi
Objective Obstructive sleep apnea (OSA) is assumed to influence the circadian blood pressure (BP) fluctuation, particularly causing nocturnal hypertension and changing the dipping pattern of nocturnal BP. This study aimed to clarify the triggers of the non-dipper pattern in nocturnal BP in Japanese patients with severe OSA (the apnea-hypopnea index ≥30/h). Methods Of 541 patients with OSA diagnosed using polysomnography (PSG) and ambulatory BP monitoring (ABPM), 163 patients <60 years of age (Younger group) and 101 patients ≥60 years of age (Older group) were stratified into the dipper or non-dipper pattern groups...
January 11, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29315614/defining-the-phenotypic-spectrum-of-slc6a1-mutations
#5
Katrine M Johannesen, Elena Gardella, Tarja Linnankivi, Carolina Courage, Anne de Saint Martin, Anna-Elina Lehesjoki, Cyril Mignot, Alexandra Afenjar, Gaetan Lesca, Marie-Thérèse Abi-Warde, Jamel Chelly, Amélie Piton, J Lawrence Merritt, Lance H Rodan, Wen-Hann Tan, Lynne M Bird, Mark Nespeca, Joseph G Gleeson, Yongjin Yoo, Murim Choi, Jong-Hee Chae, Desiree Czapansky-Beilman, Sara Chadwick Reichert, Manuela Pendziwiat, Judith S Verhoeven, Helenius J Schelhaas, Orrin Devinsky, Jakob Christensen, Nicola Specchio, Marina Trivisano, Yvonne G Weber, Caroline Nava, Boris Keren, Diane Doummar, Elise Schaefer, Sarah Hopkins, Holly Dubbs, Jessica E Shaw, Laura Pisani, Candace T Myers, Sha Tang, Shan Tang, Deb K Pal, John J Millichap, Gemma L Carvill, Kathrine L Helbig, Oriano Mecarelli, Pasquale Striano, Ingo Helbig, Guido Rubboli, Heather C Mefford, Rikke S Møller
OBJECTIVE: Pathogenic SLC6A1 variants were recently described in patients with myoclonic atonic epilepsy (MAE) and intellectual disability (ID). We set out to define the phenotypic spectrum in a larger cohort of SCL6A1-mutated patients. METHODS: We collected 24 SLC6A1 probands and 6 affected family members. Four previously published cases were included for further electroclinical description. In total, we reviewed the electroclinical data of 34 subjects. RESULTS: Cognitive development was impaired in 33/34 (97%) subjects; 28/34 had mild to moderate ID, with language impairment being the most common feature...
January 8, 2018: Epilepsia
https://www.readbyqxmd.com/read/29315089/high-amplitude-background-slow-waves-in-normal-children-aged-3-to-18-months-implications-for-the-consideration-of-hypsarhythmia
#6
John R Mytinger, Amanda Weber, Jorge Vidaurre
PURPOSE: To assess for the presence of high amplitude EEG background slow waves in normal young children. METHODS: One hundred children with normal development ages 3 to 18 months had normal EEGs for spells and did not have seizures or epilepsy. Three electroencephalographers retrospectively reviewed 5 minutes of stable stage II sleep to measure background slow waves for peak-to-peak amplitudes. A standard 10-20 longitudinal bipolar montage was used. Interrater agreement was assessed by intraclass correlation coefficient...
January 8, 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29309677/sleep-wakefulness-behaviors-in-mice-during-pregnancy-and-pregnancy-associated-hypertensive-mice
#7
Haruna Komiya, Chika Miyoshi, Kanako Iwasaki, Noriko Hotta-Hirashima, Aya Ikkyu, Satomi Kanno, Takato Honda, Masahiko Gosho, Hiromi Hamada, Toyomi Satoh, Akiyoshi Fukamizu, Hiromasa Funato, Masashi Yanagisawa
Study Objectives: In humans and other mammals, sleep is altered during pregnancy. However, no studies have been conducted on sleep/wakefulness during pregnancy in mice. In this study, we examined sleep/wakefulness in female C57BL/6 mice during pregnancy. We also examined sleep/wakefulness behaviors in an animal model of preeclampsia, pregnancy-associated hypertensive (PAH) mice, in which increased angiotensin causes hypertension. Methods: Sleep/wakefulness behaviors of female C57BL/6 mice and PAH mice were examined based on electroencephalogram (EEG)/electromyogram (EMG) recordings before, during and after pregnancy...
December 23, 2017: Sleep
https://www.readbyqxmd.com/read/29307451/sleep-patterns-associated-with-the-severity-of-impairment-in-a-large-cohort-of-patients-with-chronic-disorders-of-consciousness
#8
Davide Rossi Sebastiano, Elisa Visani, Ferruccio Panzica, Davide Sattin, Anna Bersano, Anna Nigri, Stefania Ferraro, Eugenio Parati, Matilde Leonardi, Silvana Franceschetti
OBJECTIVE: We assessed sleep patterns in 85 patients with chronic disorders of consciousness (DOC) in order to reveal any relationship with the degree of the impairment. METHODS: Nocturnal polysomnography (PSG) was scored in patients classified as being in an unresponsive wakefulness syndrome/vegetative state (UWS/VS; n = 49) or a minimally conscious state (MCS; n = 36) in accordance with the rules of the American Academy of Sleep Medicine. The PSG data in the two diagnostic groups were compared, and the PSG parameters associated with the degree of impairment were analysed...
December 24, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29306708/the-influence-of-rem-sleep-and-sws-on-emotional-memory-consolidation-in-participants-reporting-depressive-symptoms
#9
Marcus O Harrington, Jennifer M Johnson, Harriet E Croom, Kyla Pennington, Simon J Durrant
Negative emotional memory bias is thought to play a causal role in the onset and maintenance of major depressive disorder. Rapid Eye Movement (REM) sleep has been shown to selectively consolidate negative emotional memories in healthy participants, and is greater in quantity and density in depressed patients. Slow-Wave Sleep (SWS) is typically associated with the consolidation of non-emotional memories. However, the effects of REM sleep and SWS on emotional memory consolidation have not been investigated in participants reporting depressive symptoms...
December 15, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29304420/local-changes-in-computational-non-rapid-eye-movement-sleep-depth-in-infants
#10
Anna-Liisa Satomaa, Outi Saarenpää-Heikkilä, Eero Huupponen, Turkka Kirjavainen, Juhani Heinonen, Sari-Leena Himanen
OBJECTIVE: Deep NREM sleep and its hallmark EEG phenomenon slow wave activity (SWA) are under homeostatic control in adults. SWA is also locally regulated as it increases in the brain areas that have been used intensively. Moreover, in children, SWA is a marker of cortical maturation. In the present study the local properties of NREM sleep depth were evaluated using the quantitative mean frequency method. We aimed to study if age is related to NREM sleep depth in young infants. In addition, we studied if young infants have local differences in their NREM sleep...
October 16, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29286538/effect-of-gabapentin-on-sleep-and-event-related-oscillations-eros-in-rats-exposed-to-chronic-intermittent-ethanol-vapor-and-protracted-withdrawal
#11
Manuel Sanchez-Alavez, Derek N Wills, Leslie Amodeo, Cindy L Ehlers
Disturbances in sleep architecture, especially reductions in slow wave sleep (SWS), are symptoms commonly observed in individuals with alcohol use disorders (AUDs). Recent clinical trials have demonstrated that the anticonvulsant and analgesic drug Gabapentin may have therapeutic value in normalizing sleep quality in recovering alcoholics. However, the brain mechanisms underlying this improvement in sleep following Gabapentin treatment remain unknown METHODS: In the present study, adult Wistar rats were exposed to 8 weeks of chronic intermittent ethanol vapor (CIE) (blood ethanol concentrations averaged 128...
December 29, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29280209/sleep-spindles-and-slow-waves-in-schizophrenia-and-related-disorders-main-findings-challenges-and-future-perspectives
#12
Anna Castelnovo, Bianca Graziano, Fabio Ferrarelli, Armando D'Agostino
Sleep abnormalities have recently gained renewed attention in patients diagnosed with Schizophrenia. Disrupted thalamocortical brain oscillations hold promise as putative biomarkers or endophenotypes of the disorder. Despite an increase of studies related to sleep spindle and slow wave activity, findings remain in part contradictory. Although sleep spindle deficits have been confirmed in several groups of patients with chronic, medicated Schizophrenia, data on the early stages of the disorder and in unmedicated subjects are still insufficient...
December 27, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29249289/old-brains-come-uncoupled-in-sleep-slow-wave-spindle-synchrony-brain-atrophy-and-forgetting
#13
Randolph F Helfrich, Bryce A Mander, William J Jagust, Robert T Knight, Matthew P Walker
The coupled interaction between slow-wave oscillations and sleep spindles during non-rapid-eye-movement (NREM) sleep has been proposed to support memory consolidation. However, little evidence in humans supports this theory. Moreover, whether such dynamic coupling is impaired as a consequence of brain aging in later life, contributing to cognitive and memory decline, is unknown. Combining electroencephalography (EEG), structural MRI, and sleep-dependent memory assessment, we addressed these questions in cognitively normal young and older adults...
January 3, 2018: Neuron
https://www.readbyqxmd.com/read/29248868/sleep-architecture-and-eeg-power-spectra-in-recently-detoxified-alcohol-dependent-patients
#14
Lokesh Kumar Singh, S Haque Nizamie, Sai Krishna Tikka
OBJECTIVES: Persistent sleep abnormalities during abstinence are a harbinger for relapse in patients with chronic alcohol dependence. The present study aimed to compare polysomnography (PSG) data between 'recently detoxified' patients with chronic alcohol dependence and healthy controls. METHODS: Both conventional sleep architectural and power spectral analyses were conducted. Twenty subjects in each of the groups were enrolled. A 2 nights' sleep (first-habituation and second-experimental) PSG data was collected...
December 9, 2017: Asian Journal of Psychiatry
https://www.readbyqxmd.com/read/29248630/cortical-slow-wave-activity-correlates-with-striatal-synaptic-strength-in-normal-but-not-in-parkinsonian-rats
#15
Salvatore Galati, Song Wei, Gergely Orban, Andreas R Luft, Alain Kaelin-Lang
Urethane-induced cortical slow wave activity (SWA) spreads into the basal ganglia in dopamine (DA)-depleted rat models of Parkinson's disease (PD). During physiological sleep, SWA is powerfully expressed at the beginning of night and progressively reduced during sleep-time reflecting the sleep need. However, its underlying slow oscillations may contribute directly to modulate cortical plasticity. In order to determine the impact of the SWA on synaptic strength and its interplay with DA, we simultaneously recorded the electrocorticogram (ECoG) and the corticocortical- and corticostriatal-evoked potentials (CC-EPs, CS-EPs) during eight hours of robust urethane-induced SWA in both normal and PD animals...
December 15, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29248294/phenotyping-of-per3-variants-reveals-widespread-effects-on-circadian-preference-sleep-regulation-and-health
#16
REVIEW
Simon N Archer, Christina Schmidt, Gilles Vandewalle, Derk-Jan Dijk
Period3 (Per3) is one of the most robustly rhythmic genes in humans and animals. It plays a significant role in temporal organisation in peripheral tissues. The effects of PER3 variants on many phenotypes have been investigated in targeted and genome-wide studies. PER3 variants, especially the human variable number tandem repeat (VNTR), associate with diurnal preference, mental disorders, non-visual responses to light, brain and cognitive responses to sleep loss/circadian misalignment. Introducing the VNTR into mice alters responses to sleep loss and expression of sleep homeostasis-related genes...
November 6, 2017: Sleep Medicine Reviews
https://www.readbyqxmd.com/read/29247670/sleep-on-a-high-heat-capacity-mattress-increases-conductive-body-heat-loss-and-slow-wave-sleep
#17
Kurt Kräuchi, Elisa Fattori, Alessandra Giordano, Maria Falbo, Antonella Iadarola, Francesca Aglì, Antonella Tribolo, Roberto Mutani, Alessandro Cicolin
Environmental temperature can strongly affect sleep. The habitual sleep phase is usually located between evening decline and morning rise of the circadian rhythm of core body temperature (CBT). However, the thermophysiological mechanisms promoting or disturbing sleep are not yet fully understood. The purpose of this study was to examine the effects of a high heat capacity mattress (HHCM) on CBT, skin temperatures and sleep in comparison to a conventional low heat capacity mattress (LHCM). Based on the higher heat capacity of HHCM an increase in conductive body heat loss enhances the nocturnal decline in CBT can be expected...
December 13, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29246269/adult-onset-sleepwalking-secondary-to-hyperthyroidism-polygraphic-evidence
#18
Loretta Giuliano, Daniela Fatuzzo, Greta Mainieri, Sandro La Vignera, Vito Sofia, Mario Zappia
Sleepwalking is a disorder characterized by complex motor behaviors arising from slow wave sleep usually occurring in children. The adult onset of sleepwalking suggests the presence of an external precipitating factor leading to the occurrence of the disorder. Hyperthyroidism has been reported to be the possible cause of sleepwalking in a few cases. We present the case of a 36-year-old man who reported a sudden appearance of nocturnal episodes of sleepwalking. He underwent a complete video polysomnography (VPSG), which showed a polygraphic pattern arising from stage N3 sleep related to the presence of simple motor behaviors...
December 13, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/29234075/replay-of-large-scale-spatio-temporal-patterns-from-waking-during-subsequent-nrem-sleep-in-human-cortex
#19
Xi Jiang, Isaac Shamie, Werner K Doyle, Daniel Friedman, Patricia Dugan, Orrin Devinsky, Emad Eskandar, Sydney S Cash, Thomas Thesen, Eric Halgren
Animal studies support the hypothesis that in slow-wave sleep, replay of waking neocortical activity under hippocampal guidance leads to memory consolidation. However, no intracranial electrophysiological evidence for replay exists in humans. We identified consistent sequences of population firing peaks across widespread cortical regions during complete waking periods. The occurrence of these "Motifs" were compared between sleeps preceding the waking period ("Sleep-Pre") when the Motifs were identified, and those following ("Sleep-Post")...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29230640/new-class-of-reduced-computationally-efficient-neuronal-models-for-large-scale-simulations-of-brain-dynamics
#20
Maxim Komarov, Giri Krishnan, Sylvain Chauvette, Nikolai Rulkov, Igor Timofeev, Maxim Bazhenov
During slow-wave sleep, brain electrical activity is dominated by the slow (< 1 Hz) electroencephalogram (EEG) oscillations characterized by the periodic transitions between active (or Up) and silent (or Down) states in the membrane voltage of the cortical and thalamic neurons. Sleep slow oscillation is believed to play critical role in consolidation of recent memories. Past computational studies, based on the Hodgkin-Huxley type neuronal models, revealed possible intracellular and network mechanisms of the neuronal activity during sleep, however, they failed to explore the large-scale cortical network dynamics depending on collective behavior in the large populations of neurons...
December 12, 2017: Journal of Computational Neuroscience
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