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https://www.readbyqxmd.com/read/28718301/web-addiction-in-the-brain-cortical-oscillations-autonomic-activity-and-behavioral-measures
#1
Michela Balconi, Salvatore Campanella, Roberta Finocchiaro
Background and aims Internet addiction (IA) was recently defined as a disorder tagging both the impulse control and the reward systems. Specifically, inhibitory deficits and reward bias were considered highly relevant in IA. This research aims to examine the electrophysiological correlates and autonomic activity [skin conductance response (SCR) and heart rate] in two groups of young subjects (N = 25), with high or low IA profile [tested by the Internet Addiction Test (IAT)], with specific reference to gambling behavior...
July 18, 2017: Journal of Behavioral Addictions
https://www.readbyqxmd.com/read/28704817/outcome-of-preterm-neonates-with-a-birth-weight-1-500-g-with-severe-hypoxemic-respiratory-failure-rescued-by-inhaled-nitric-oxide-therapy-and-high-frequency-oscillatory-ventilation
#2
Atoosa Golfar, Jagmeet Bhogal, Barbara Kamstra, Ann Hudson-Mason, Mosarrat Qureshi, Georg M Schmölzer, Po-Yin Cheung
BACKGROUND: Despite being an experimental therapy in preterm neonates, inhaled nitric oxide (iNO) is used as a rescue therapy when high-frequency oscillatory ventilation (HFOV) and other conventional therapies fail. OBJECTIVE: We aimed to determine the outcomes of very-low-birth-weight (VLBW) neonates with hypoxemic respiratory failure (HRF) who had received iNO after maximal conventional therapies. METHODS: We retrospectively reviewed preterm neonates (<33 weeks of gestation with a birth weight <1,500 g) who had all received HFOV and then iNO from March 1, 2009 to April 1, 2014 at the Royal Alexandra Hospital...
July 14, 2017: Neonatology
https://www.readbyqxmd.com/read/28702344/directional-information-flow-in-patients-with-alzheimer-s-disease-a-source-space-resting-state-meg-study
#3
M M A Engels, M Yu, C J Stam, A A Gouw, W M van der Flier, Ph Scheltens, E C W van Straaten, A Hillebrand
In a recent magnetoencephalography (MEG) study, we found posterior-to-anterior information flow over the cortex in higher frequency bands in healthy subjects, with a reversed pattern in the theta band. A disruption of information flow may underlie clinical symptoms in Alzheimer's disease (AD). In AD, highly connected regions (hubs) in posterior areas are mostly disrupted. We therefore hypothesized that in AD the information flow from these hub regions would be disturbed. We used resting-state MEG recordings from 27 early-onset AD patients and 26 healthy controls...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28698268/effects-of-volume-guaranteed-ventilation-combined-with-two-different-modes-in-preterm-infants
#4
Sezin Unal, Ebru Ergenekon, Selma Aktas, Nilgun Altuntas, Serdar Beken, Ebru Kazanci, Ferit Kulali, Ozlem Gulbahar, Ibrahim M Hirfanoglu, Esra Onal, Canan Turkyilmaz, Esin Koc, Yildiz Atalay
BACKGROUND: Volume-controlled ventilation modes have been shown to reduce duration of mechanical ventilation, incidence of chronic lung disease, failure of primary mode of ventilation, hypocarbia, severe intraventricular hemorrhage, pneumothorax, and periventricular leukomalacia in preterm infants when compared with pressure limited ventilation modes. Volume-guarantee (VG) ventilation is the most commonly used mode for volume-controlled ventilation. Assist control, pressure-support ventilation (PSV), and synchronized intermittent mandatory ventilation (SIMV) can be combined with VG; however, there is a lack of knowledge on the superiority of each regarding clinical outcomes...
July 11, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28690402/nonlinear-model-identification-and-spectral-submanifolds-for-multi-degree-of-freedom-mechanical-vibrations
#5
Robert Szalai, David Ehrhardt, George Haller
In a nonlinear oscillatory system, spectral submanifolds (SSMs) are the smoothest invariant manifolds tangent to linear modal subspaces of an equilibrium. Amplitude-frequency plots of the dynamics on SSMs provide the classic backbone curves sought in experimental nonlinear model identification. We develop here, a methodology to compute analytically both the shape of SSMs and their corresponding backbone curves from a data-assimilating model fitted to experimental vibration signals. This model identification utilizes Taken's delay-embedding theorem, as well as a least square fit to the Taylor expansion of the sampling map associated with that embedding...
June 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28684287/high-frequency-oscillatory-ventilation-in-adults-with-ards-past-present-and-future
#6
REVIEW
Michael C Sklar, Eddy Fan, Ewan C Goligher
High-frequency oscillatory ventilation (HFOV) is a unique mode of mechanical ventilation that utilizes non-conventional gas exchange mechanisms to deliver ventilation at very low tidal volumes and high frequencies. The properties of HFOV make it a potentially ideal mode to prevent ventilator-induced lung injury in patients with acute respiratory distress syndrome. Despite a compelling physiological basis and promising experimental data, large randomized controlled trials have not detected an improvement in survival with the use of HFOV; the use of HFOV as an early lung-protective strategy in patients with ARDS may be harmful...
July 3, 2017: Chest
https://www.readbyqxmd.com/read/28682001/weight-correction-of-carbon-dioxide-diffusion-coefficient-dco2-reduces-its-inter-individual-variability-and-improves-its-correlation-with-blood-carbon-dioxide-levels-in-neonates-receiving-high-frequency-oscillatory-ventilation
#7
Gusztav Belteki, Benjamin Lin, Colin J Morley
BACKGROUND: Carbon-dioxide elimination during high-frequency oscillatory ventilation (HFOV) is thought to be proportional to the carbon dioxide diffusion coefficient (DCO2 ) which is calculated as frequency x (tidal volume)(2) . DCO2 can be used to as an indicator of CO2 elimination but values obtained in different patients cannot be directly compared. OBJECTIVES: To analyze the relationship between DCO2 , the weight-corrected DCO2 (DCO2 corr) and blood gas PCO2 values obtained from infants receiving HFOV...
July 6, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28679124/pharynx-mitochondrial-ca2-dynamics-in-live-c-elegans-worms-during-aging
#8
Pilar Alvarez-Illera, Paloma García-Casas, Jessica Arias-Del-Val, Rosalba I Fonteriz, Javier Alvarez, Mayte Montero
Progressive decline in mitochondrial function is generally considered one of the hallmarks of aging. We have expressed a Ca2+ sensor in the mitochondrial matrix of C. elegans pharynx cells and we have measured for the first time mitochondrial [Ca2+] ([Ca2+]M) dynamics in the pharynx of live C. elegans worms during aging. Our results show that worms stimulated with serotonin display a pharynx [Ca2+]M oscillatory kinetics that includes both high frequency oscillations (up to about 1Hz) and very prolonged "square-wave" [Ca2+]M increases, indicative of energy depletion of the pharynx cells...
June 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28672094/noninvasive-high-frequency-oscillatory-ventilation-versus-nasal-continuous-positive-airway-pressure-in-preterm-infants-with-moderate-severe-respiratory-distress-syndrome-a-preliminary-report
#9
Xing-Wang Zhu, Jin-Ning Zhao, Shi-Fang Tang, Jun Yan, Yuan Shi
OBJECTIVE: The aim of this study was to compare the effect of noninvasive high-frequency oscillatory ventilation (nHFOV) with nasal continuous positive airway pressure (nCPAP) in preterm infants with moderate-severe respiratory distress syndrome (RDS) after surfactant administration via INSURE (intubation, surfactant, extubation) method on the need for invasive mechanical ventilation (IMV). METHODS: A total of 81 infants with a gestational age (GA) of 28-34 weeks were eligible and were randomized to nCPAP (n = 42) or to nHFOV (n = 39)...
August 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28668502/bdnf-as-a-possible-modulator-of-eeg-oscillatory-response-at-the-parietal-cortex-during-visuo-tactile-integration-processes-using-a-rubber-hand
#10
Ryosuke Hiramoto, Noriaki Kanayama, Takashi Nakao, Tomoya Matsumoto, Hirona Konishi, Satoru Sakurai, Go Okada, Yasumasa Okamoto, Shigeto Yamawaki
Multisensory integration of visuo-tactile information presented on the body or a dummy body has a strong impact on body image. Previous research shows that alteration of body image induced by visuo-tactile integration is closely related to the activation of the parietal cortex, a sensory association area. The expression of brain-derived neurotrophic factor (BDNF) in the parietal area of macaque monkeys is thought to modulate the activation of the parietal cortex and alter the extension of body image during tool-use learning...
June 28, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28667960/a-model-combustor-for-studying-a-reacting-jet-in-an-oscillating-crossflow
#11
Christopher A Fugger, Rohan M Gejji, J Enrique Portillo, Yen Yu, Robert P Lucht, William E Anderson
This paper discusses a novel model combustion experiment that was built for studying the structure and dynamics of a reacting jet in an unsteady crossflow. A natural-gas-fired dump combustor is used to generate and sustain an acoustically oscillating vitiated flow that serves as the crossflow for transverse jet injection. Unlike most other techniques that are limited in operating pressure or acoustic amplitude, this method of generating an unsteady flow field is demonstrated at a pressure of 10 atm with peak-to-peak oscillation amplitudes approaching 20% of the mean pressure...
June 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28665929/effect-of-frequency-on-pressure-cost-of-ventilation-and-gas-exchange-in-newborns-receiving-high-frequency-oscillatory-hfov
#12
Emanuela Zannin, Raffaele L Dellaca', Giulia Dognini, Lara Marconi, Martina Perego, Jane J Pillow, Paolo E Tagliabue, Maria Luisa Ventura
BACKGROUND: We hypothesized that ventilating at the resonant frequency of the respiratory system optimizes gas exchange while limiting the mechanical stress to the lung in newborns receiving HFOV. We characterized the frequency dependence of oscillatory mechanics, gas exchange and pressure transmission during HFOV. METHODS: We studied 13 newborn infants with a median (IQR) gestational age of 29.3(26.4-30.4) weeks and body weight of 1.00(0.84-1.43) kg. Different frequencies (5, 8, 10, 12, 15 Hz) were tested, keeping carbon dioxide diffusion coefficient (DCO2) constant...
June 30, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28665134/monolithic-oled-microwire-devices-for-ultrastrong-magnetic-resonant-excitation
#13
Shirin Jamali, Gajadhar Joshi, Hans Malissa, John M Lupton, Christoph Boehme
Organic light-emitting diodes (OLEDs) make highly sensitive probes to test magnetic resonance phenomena under unconventional conditions since spin precession controls singlet-triplet transitions of electron-hole pairs, which in turn give rise to distinct recombination currents in conductivity. Electron paramagnetic resonance can therefore be detected in the absence of spin polarization. We exploit this characteristic to explore the exotic regime of ultrastrong light-matter coupling, where the Rabi frequency of a charge carrier spin is of the order of the transition frequency of the two-level system...
June 30, 2017: Nano Letters
https://www.readbyqxmd.com/read/28643918/effect-of-cyclical-forces-on-orthodontic-tooth-movement-from%C3%A2-animals-to-humans
#14
REVIEW
F Uribe, E Dutra, T Chandhoke
Vibration as a non-invasive method is currently available for clinical use with the potential to accelerate the rate of tooth movement in orthodontics. The aim of this review was to evaluate the basic science and clinical literature on the effects of vibration on the axial and appendicular skeleton including the craniofacial bone. Vibration as a dynamic load consisting of high oscillatory forces of low magnitude has shown osteogenic and anti-catabolic effects on bone. These effects have been observed in the craniofacial skeleton including the alveolar bone as increases in sutural width and alveolar bone formation...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28642341/use-of-intraoperative-local-field-potential-spectral-analysis-to-differentiate-basal-ganglia-structures-in-parkinson-s-disease-patients
#15
Rachel Kolb, Aviva Abosch, Gidon Felsen, John A Thompson
Identification of brain structures traversed during implantation of deep brain-stimulating (DBS) electrodes into the subthalamic nucleus (STN-DBS) for the treatment of Parkinson's disease (PD) frequently relies on subjective correspondence between kinesthetic response and multiunit activity. However, recent work suggests that local field potentials (LFP) could be used as a more robust signal to objectively differentiate subcortical structures. The goal of this study was to analyze the spectral properties of LFP collected during STN-DBS in order to objectively identify commonly traversed brain regions and improve our understanding of aberrant oscillations in the PD-related pathophysiological cortico-basal ganglia network...
June 2017: Physiological Reports
https://www.readbyqxmd.com/read/28638715/rat-intersubjective-decisions-are-encoded-by-frequency-specific-oscillatory-contexts
#16
Jana Schaich Borg, Sanvesh Srivastava, Lizhen Lin, Joseph Heffner, David Dunson, Kafui Dzirasa, Luis de Lecea
INTRODUCTION: It is unknown how the brain coordinates decisions to withstand personal costs in order to prevent other individuals' distress. Here we test whether local field potential (LFP) oscillations between brain regions create "neural contexts" that select specific brain functions and encode the outcomes of these types of intersubjective decisions. METHODS: Rats participated in an "Intersubjective Avoidance Test" (IAT) that tested rats' willingness to enter an innately aversive chamber to prevent another rat from getting shocked...
June 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28620295/slow-and-fast-neocortical-oscillations-in-the-senescence-accelerated-mouse-model-samp8
#17
Patricia Castano-Prat, Maria Perez-Zabalza, Lorena Perez-Mendez, Rosa M Escorihuela, Maria V Sanchez-Vives
The senescence-accelerated mouse prone 8 (SAMP8) model is characterized by accelerated, progressive cognitive decline as well as Alzheimer's disease (AD)-like neurodegenerative changes, and resembles the etiology of multicausal, sporadic late-onset/age-related AD in humans. Our aim was to find whether these AD-like pathological features, together with the cognitive deficits present in the SAMP8 strain, are accompanied by disturbances in cortical network activity with respect to control mice (SAM resistance 1, SAMR1) and, if so, how the alterations in cortical activity progress with age...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28607397/oscillatory-bursting-of-gel-fuel-droplets-in-a-reacting-environment
#18
Ankur Miglani, Purushothaman Nandagopalan, Jerin John, Seung Wook Baek
Understanding the combustion behavior of gel fuel droplets is pivotal for enhancing burn rates, lowering ignition delay and improving the operational performance of next-generation propulsion systems. Vapor jetting in burning gel fuel droplets is a crucial process that enables an effective transport (convectively) of unreacted fuel from the droplet domain to the flame zone and accelerates the gas-phase mixing process. Here, first we show that the combusting ethanol gel droplets (organic gellant laden) exhibit a new oscillatory jetting mode due to aperiodic bursting of the droplet shell...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28600255/effects-of-electrical-and-optogenetic-deep-brain-stimulation-on-synchronized-oscillatory-activity-in-parkinsonian-basal-ganglia
#19
Shivakeshavan Ratnadurai-Giridharan, Chung Cheung, Leonid Rubchinsky
Conventional deep brain stimulation (DBS) of basal ganglia uses high-frequency regular electrical pulses to treat Parkinsonian motor symptoms and has a series of limitations. Relatively new and not yet clinically tested optogenetic stimulation is an effective experimental stimulation technique to affect pathological network dynamics. We compared the effects of electrical and optogenetic stimulation of the basal ganglia on the pathological parkinsonian rhythmic neural activity. We studied the network response to electrical stimulation and excitatory and inhibitory optogenetic stimulations...
June 6, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28595689/high-frequency-oscillatory-ventilation-hfov-as-primary-ventilator-strategy-in-the-management-of-severe-acute-respiratory-distress-syndrome-ards-with-pneumothorax-in-the-setting-of-trauma
#20
Patrizio Petrone, Kartik Prabhakaran, Daniel Hagler, Dominick Vitale, Alejandro Betancourt, Corrado P Marini
No abstract text is available yet for this article.
May 1, 2017: American Surgeon
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