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https://www.readbyqxmd.com/read/28819676/granger-causality-supports-abnormal-functional-connectivity-of-beta-oscillations-in-the-dorsolateral-striatum-and-substantia-nigra-pars-reticulata-in-hemiparkinsonian-rats
#1
Qiang Wang, Min Li, Zhengyuan Xie, Junbin Cai, Nanxiang Li, Hu Xiao, Ning Wang, Jinyan Wang, Fei Luo, Wangming Zhang
Synchronized oscillatory neuronal activity in the beta frequency range has been reported in the basal ganglia (BG) of patients with Parkinson disease (PD) and PD animal models. The coherent abnormal oscillatory activities in the dorsolateral striatum (dStr) and substantia nigra pars reticulata (SNr) that accompany parkinsonian states have not been resolved. In this study, we recorded local field potentials (LFPs) in the dStr and SNr of 6-hydroxydopamine (6-OHDA)-induced dopamine (DA)-lesioned rats in an awake, resting state...
August 17, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28814637/asymmetric-vestibular-stimulation-reveals-persistent-disruption-of-motion-perception-in-unilateral-vestibular-lesions
#2
Roberto Panichi, Mario Faralli, Rosa Bruni, Artemis Kiriakarely, Chiara Occhigrossi, Aldo Ferraresi, Adolfo M Bronstein, Vito Enrico Pettorossi
Self-motion perception was studied in patients with unilateral vestibular lesions (UVL) due to acute vestibular neuritis at 1 week, 4, 8 and 12 months after the acute episode. We assessed vestibularly-mediated self-motion perception by measuring the error in reproducing the position of a remembered visual target at the end of 4 cycles of asymmetric whole-body rotation. The oscillatory stimulus consists of a slow (0.09Hz) and a fast (0.38Hz) half cycle. A large error was present in UVL patients when the slow half cycle was delivered towards the lesion side, but minimal towards the healthy side...
August 16, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28803335/intraoperative-ventilation-during-thoracoscopic-repair-of-neonatal-congenital-diaphragmatic-hernia
#3
Tadaharu Okazaki, Manabu Okawada, Junya Ishii, Hiroyuki Koga, Go Miyano, Takashi Doi, Yuki Ogasawara, Geoffrey J Lane, Atsuyuki Yamataka
PURPOSE: To evaluate the optimal ventilation mode during thoracoscopic repair (TR) of neonatal congenital diaphragmatic hernia (CDH), we compared high-frequency oscillatory ventilation (HFOV) with conventional mechanical ventilation (CMV). METHODS: Twenty-three neonatal CDH cases who underwent TR without intraoperative inhalation of nitric oxide at our institution between 2007 and 2016 were reviewed. Patients were initially ventilated with HFOV, which was converted to CMV if the HFOV settings were decreased to FiO2 <0...
August 12, 2017: Pediatric Surgery International
https://www.readbyqxmd.com/read/28794965/efficacy-of-lung-volume-optimization-maneuver-monitored-by-optoelectronic-pletismography-in-the-management-of-congenital-diaphragmatic-hernia
#4
G Lista, I Bresesti, F Cavigioli, F Castoldi, E Lupo, A LoMauro, A Aliverti
Newborns affected by congenital diaphragmatic hernia (CDH) need cardio-respiratory stabilization before undergoing surgical repair. Open lung strategy is a well-established approach to optimize lung volume in preterm infants with Respiratory Distress Syndrome (RDS), using both High Frequency Oscillatory Ventilation (HFOV) and Conventional Mechanical Ventilation (CMV). We report a case of left CDH with severe lung hypoplasia, managed applying open lung strategy in HFOV (pre-surgery period) and in Assist-Control with Volume Guarantee (post-surgery period), guided by SpO2 changes, TcPO2 and TcPCO2 monitoring...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28757754/therapeutic-hypothermia-brings-favorable-neurologic-outcomes-in-children-with-near-drowning
#5
Ming-Chun Chen, Chia-Hsiang Chu, Ching-Feng Cheng, Jun-Song Lin, Jui-Hsia Chen, Yu-Hsun Chang
A 1-year-10-month-old boy was admitted to our pediatric intensive care unit due to near drowning with pulmonary edema. A conventional ventilator with 100% oxygen supplementation was used initially, but was shifted to high frequency oscillatory ventilation as his oxygen saturation was around 84-88%. Therapeutic hypothermia was applied due to hypoxic ischemic encephalopathy with severe acidosis. His respiratory condition improved and he was extubated successfully on the 6(th) hospital day. The patient had no obvious neurological defects and he was discharged in a stable condition after 17 days of hospitalization...
October 2016: Ci Ji Yi Xue za Zhi, Tzu-chi Medical Journal
https://www.readbyqxmd.com/read/28757194/time-resolved-phase-amplitude-coupling-in-neural-oscillations
#6
Soheila Samiee, Sylvain Baillet
Cross-frequency coupling between neural oscillations is a phenomenon observed across spatial scales in a wide range of preparations, including human non-invasive electrophysiology. Although the functional role and mechanisms involved are not entirely understood, the concept of interdependent neural oscillations drives an active field of research to comprehend the ubiquitous polyrhythmic activity of the brain, beyond empirical observations. Phase-amplitude coupling, a particular form of cross-frequency coupling between bursts of high-frequency oscillations and the phase of lower frequency rhythms, has recently received considerable attention...
July 27, 2017: NeuroImage
https://www.readbyqxmd.com/read/28756348/measuring-alterations-in-oscillatory-brain-networks-in-schizophrenia-with-resting-state-meg-state-of-the-art-and-methodological-challenges
#7
Golnoush Alamian, Ana-Sofía Hincapié, Annalisa Pascarella, Thomas Thiery, Etienne Combrisson, Anne-Lise Saive, Véronique Martel, Dmitrii Althukov, Frédéric Haesebaert, Karim Jerbi
OBJECTIVE: Neuroimaging studies provide evidence of disturbed resting-state brain networks in Schizophrenia (SZ). However, untangling the neuronal mechanisms that subserve these baseline alterations requires measurement of their electrophysiological underpinnings. This systematic review specifically investigates the contributions of resting-state Magnetoencephalography (MEG) in elucidating abnormal neural organization in SZ patients. METHOD: A systematic literature review of resting-state MEG studies in SZ was conducted...
September 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28756240/frequency-specific-modulation-of-connectivity-in-the-ipsilateral-sensorimotor-cortex-by-different-forms-of-movement-initiation
#8
Bin A Wang, Shivakumar Viswanathan, Rouhollah O Abdollahi, Nils Rosjat, Svitlana Popovych, Silvia Daun, Christian Grefkes, Gereon R Fink
A consistent finding in motor EEG research is a bilateral attenuation of oscillatory activity over sensorimotor regions close to the onset of an upcoming unilateral hand movement. In contrast, little is known about how movement initiation affects oscillatory activity, especially in the hemisphere ipsilateral to the moving hand. We here investigated the neural mechanisms modulating oscillatory activity in the ipsilateral motor cortex prior to movement onset under the control of two different initiating networks, namely, Self-initiated and Visually-cued actions...
July 26, 2017: NeuroImage
https://www.readbyqxmd.com/read/28744783/towards-the-identification-of-hemodynamic-parameters-involved-in-arteriovenous-fistula-maturation-and-failure-a-review
#9
Marco Franzoni, Michael T Walsh
Native arteriovenous fistulas have a high failure rate mainly due to the lack of maturation and uncontrolled neo-intimal hyperplasia development. Newly established hemodynamics is thought to be central in driving the fistula fate, after surgical creation. To investigate the effects of realistic wall shear stress stimuli on endothelial cells, an in vitro approach is necessary in order to reduce the complexity of the in vivo environment. After a systematic review, realistic WSS waveforms were selected and analysed in terms of magnitude, temporal gradient, presence of reversing phases (oscillatory shear index, OSI) and frequency content (hemodynamics index, HI)...
July 25, 2017: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/28739525/state-dependent-alpha-peak-frequency-shifts-experimental-evidence-potential-mechanisms-and-functional-implications
#10
REVIEW
Andreas Mierau, Wolfgang Klimesch, Jérémie Lefebvre
Neural populations produce complex oscillatory patterns thought to implement brain function. The dominant rhythm in the healthy adult human brain is formed by alpha oscillations with a typical power peak most commonly found between 8 and 12Hz. This alpha peak frequency has been repeatedly discussed as a highly heritable and stable neurophysiological "trait" marker reflecting anatomical properties of the brain, and individuals' general cognitive capacity. However, growing evidence suggests that the alpha peak frequency is highly volatile at shorter time scales, dependent on the individuals' "state"...
July 22, 2017: Neuroscience
https://www.readbyqxmd.com/read/28728546/successful-rescue-combination-of-extracorporeal-membrane-oxygenation-high-frequency-oscillatory-ventilation-and-prone-positioning-for-the-management-of-severe-methicillin-resistant-staphylococcus-aureus-pneumonia-complicated-by-pneumothorax-a-case-report-and
#11
Hangyong He, Hao Wang, Xuyan Li, Xiao Tang, Rui Wang, Bing Sun, Zhaohui Tong
BACKGROUND: To describe the experience of combination therapy with extracorporeal membrane oxygenation(ECMO), high-frequency oscillatory ventilation(HFOV) and prone positioning in treating severe respiratory failure caused by community acquired methicillin resistant Staphylococcus aureus(CA-MRSA). CASE PRESENTATION: A 30-year-old female presented with fever and dyspnea for 3 days. She was diagnosed CA-MRSA pneumonia complicated by severe respiratory failure, pneumothorax and neutropenia...
July 20, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28718301/web-addiction-in-the-brain-cortical-oscillations-autonomic-activity-and-behavioral-measures
#12
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
#13
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
#14
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
#15
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
#16
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
#17
REVIEW
Michael C Sklar, Eddy Fan, Ewan C Goligher
High-frequency oscillatory ventilation (HFOV) is a unique mode of mechanical ventilation that uses nonconventional 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 ARDS. 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, and its use 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
#18
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
#19
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
#20
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
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