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Cross frequency coupling

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https://www.readbyqxmd.com/read/29689763/relationship-between-motion-sickness-susceptibility-and-vestibulo-ocular-reflex-gain-and-phase
#1
Gilles Clément, Millard F Reschke
BACKGROUND: It has been proposed that individual susceptibility to motion sickness is related to the vestibulo-ocular reflex (VOR) through the activation of the velocity storage mechanism. OBJECTIVE: We investigated whether motion sickness level was related to the gain and phase of the VOR. METHODS: VOR gain and phase were measured in 214 subjects while they rotated in yaw at 0.01 Hz, 0.02 Hz, 0.04 Hz, 0.08 Hz, and 0.16 Hz in darkness, and results were compared to the severity of symptoms the subjects experienced during subsequent tests to provoke motion sickness...
April 18, 2018: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29676210/reduced-purposeful-head-movements-during-community-ambulation-following-unilateral-vestibular-loss
#2
Serene Sulyn Paul, Leland E Dibble, Raymond G Walther, Clough Shelton, Richard Klaus Gurgel, Mark Eric Lester
BACKGROUND: Individuals with unilateral vestibular hypofunction (UVH) alter their movement and reduce mobility to try to stabilize their gaze and avoid symptoms of dizziness and vertigo. OBJECTIVE: To determine if individuals with UVH 6 weeks after surgery demonstrate altered head and trunk kinematics during community ambulation. METHODS: A total of 15 vestibular schwannoma patients with documented postoperative unilateral vestibular loss and 9 healthy controls with symmetrical vestibulo-ocular reflexes participated in this cross-sectional study...
April 1, 2018: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/29670177/proton-decoupled-carbon-magnetic-resonance-spectroscopy-in-human-calf-muscles-at-7-t-using-a-multi-channel-radiofrequency-coil
#3
Sigrun Goluch, Roberta Frass-Kriegl, Martin Meyerspeer, Michael Pichler, Jürgen Sieg, Martin Gajdošík, Martin Krššák, Elmar Laistler
13 C magnetic resonance spectroscopy is a viable, non-invasive method to study cell metabolism in skeletal muscles. However, MR sensitivity of 13 C is inherently low, which can be overcome by applying a higher static magnetic field strength together with radiofrequency coil arrays instead of single loop coils or large volume coils, and 1 H decoupling, which leads to a simplified spectral pattern. 1 H-decoupled 13 C-MRS requires RF coils which support both, 1 H and 13 C, Larmor frequencies with sufficient electromagnetic isolation between the pathways of the two frequencies...
April 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29652832/sympathetic-nerve-hyperactivity-in-the-spleen-causal-for-nonpathogenic-driven-chronic-immune-mediated-inflammatory-diseases-imids
#4
REVIEW
Denise L Bellinger, Dianne Lorton
Immune-Mediated Inflammatory Diseases (IMIDs) is a descriptive term coined for an eclectic group of diseases or conditions that share common inflammatory pathways, and for which there is no definitive etiology. IMIDs affect the elderly most severely, with many older individuals having two or more IMIDs. These diseases include, but are not limited to, type-1 diabetes, obesity, hypertension, chronic pulmonary disease, coronary heart disease, inflammatory bowel disease, and autoimmunity, such as rheumatoid arthritis (RA), Sjőgren's syndrome, systemic lupus erythematosus, psoriasis, psoriatic arthritis, and multiple sclerosis...
April 13, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29629063/major-adverse-cardiovascular-event-mace-after-percutaneous-coronary-intervention-in-one-year-follow-up-study
#5
Hossein Farshidi, Ahmadnoor Abdi, Abdulhussain Madani, Shahram Moshiri, Abolfazl Ghasemi, Ruhollah Hakimian
Background: Percutaneous coronary intervention (PCI) is the most common revascularization procedure, with over 1 million performed each year, worldwide. Over the past 20 years, the increasing experience of operators coupled with the advent of newer technologies, including coronary stents and a variety of adjuvant drug therapies, have permitted more successful procedures and decreased the morbidity associated with PCIs. Objective: To identify the incidence, predictors, and clinical implications of Major Adverse Cardiovascular Events (MACE) after PCIs...
February 2018: Electronic Physician
https://www.readbyqxmd.com/read/29621579/diet-composition-and-serum-levels-of-selenium-species-a-cross-sectional-study
#6
Tommaso Filippini, Bernhard Michalke, Lauren A Wise, Carlotta Malagoli, Marcella Malavolti, Luciano Vescovi, Chiara Salvia, Annalisa Bargellini, Sabina Sieri, Vittorio Krogh, Margherita Ferrante, Marco Vinceti
Selenium is a trace element of both nutritional and toxicological interest, depending on its dose and chemical form. Diet is the primary source of exposure for most individuals. We sought to investigate the influence of food intake on serum levels of selenium species. Among fifty subjects randomly selected from a Northern Italian population, we assessed dietary habits using a validated semiquantitative food frequency questionnaire. We also measured circulating levels of selenium species in serum using high pressure liquid chromatography associated with inductively-coupled plasma dynamic reaction cell mass spectrometer...
April 2, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29618445/assessment-of-children-immunization-pattern-in-children-hospital-lahore-pakistan
#7
Kalsoom Tariq, Rukiya Tariq
The basic aim is to assess immunization pattern of children up to 15 months of age. A cross-sectional study was conducted on 100 immunized children in Children hospital Lahore, Pakistan. Single dose 0.05ml to 0.1ml of BCG was recommended at the time of birth. Three doses of 0.5ml of Pneumococcal vaccine was given, coupled with the Penta-valent vaccine was given at 6 week, 10 week and 14 weeks of age. Two doses 0.5ml of measles vaccine was given at 9 & 15 months. Respondent's sex, age and the vaccinated children against diseases were analyzed in the form of percentages and frequency tables through statistical analysis in the software called SPSS version 16...
March 2018: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29614228/temperature-dependence-of-the-air-water-interface-revealed-by-polarization-sensitive-sum-frequency-generation-spectroscopy
#8
Daniel R Moberg, Shelby C Straight, Francesco Paesani
The temperature dependence of the vibrational sum-frequency generation (vSFG) spectra of the the air/water interface is investigated using many-body molecular dynamics (MB-MD) simulations performed with the MB-pol potential energy function. The total vSFG spectra calculated for different polarization combinations are then analyzed in terms of molecular auto-correlation and cross-correlation contributions. To provide molecular-level insights into interfacial hydrogen-bonding topologies, which give rise to specific spectroscopic features, the vSFG spectra are further investigated by separating contributions associated with water molecules donating 0, 1, or 2 hydrogen bonds to neighboring water molecules...
April 3, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29601879/thermal-restraint-of-a-bacterial-exopolysaccharide-of-shallow-vent-origin
#9
Maria Teresa Caccamo, Vincenzo Zammuto, Concetta Gugliandolo, Claire Madeleine-Perdrillat, Antonio Spanò, Salvatore Magazù
To dynamically characterize the thermal properties of the fructose-rich exopolysaccharide (EPS1-T14), produced by the marine thermophilic Bacillus licheniformis T14, the Attenuated Total Reflectance Fourier Transform Infra-Red spectroscopy was coupled to variable temperature ranging from ambient to 80 °C. The spectra were analyzed by the following innovative mathematical tools: i) non-ideal spectral deviation, ii) OH-stretching band frequency center shift, iii) spectral distance, and iv) wavelet cross-correlation analysis...
March 27, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29595830/influence-of-dietary-patterns-on-plasma-soluble-cd14-a-surrogate-marker-of-gut-barrier-dysfunction
#10
Fred K Tabung, Brenda M Birmann, Mara M Epstein, Otoniel Martínez-Maza, Elizabeth C Breen, Kana Wu, Edward L Giovannucci
Background: Specific foods and nutrients, including alcohol, may contribute to gut barrier dysfunction. However, to our knowledge, the influence of whole diets is currently unknown. Objective: We aimed to cross-sectionally investigate associations of dietary patterns with plasma soluble CD14 (sCD14), which is released by macrophages on stimulation with endotoxin and has been used as a marker of gut hyperpermeability. Methods: We used food-frequency questionnaire data collected from 689 women in the Nurses' Health Study and 509 men in the Health Professionals Follow-Up Study...
November 1, 2017: Current developments in nutrition
https://www.readbyqxmd.com/read/29559923/bidirectional-cardio-respiratory-interactions-in-heart-failure
#11
Nikola N Radovanović, Siniša U Pavlović, Goran Milašinović, Bratislav Kirćanski, Mirjana M Platiša
We investigated cardio-respiratory coupling in patients with heart failure by quantification of bidirectional interactions between cardiac (RR intervals) and respiratory signals with complementary measures of time series analysis. Heart failure patients were divided into three groups of twenty, age and gender matched, subjects: with sinus rhythm (HF-Sin), with sinus rhythm and ventricular extrasystoles (HF-VES), and with permanent atrial fibrillation (HF-AF). We included patients with indication for implantation of implantable cardioverter defibrillator or cardiac resynchronization therapy device...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29555280/measurement-of-distribution-of-broadband-noise-and-sound-pressures-in-sonochemical-reactor
#12
Keiji Yasuda, Tam Thanh Nguyen, Yoshiyuki Asakura
Cross-sectional area distribution of broadband noise in a sonochemical reactor was measured to estimate reaction fields. A needle-type hydrophone scanned the sonochemical reactor in horizontal and vertical directions at one-millimeter interval. To show an absolute value of broadband noise, average of broadband sound pressure was defined. The distribution of sound pressures at the fundamental and second harmonic frequencies were also measured. In the case of driving frequency at 130 kHz, sonochemical reaction fields were observed in several ellipse shapes...
May 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29553271/electron-electron-cross-relaxation-and-spectral-diffusion-during-dnp-experiments-on-solids
#13
Krishnendu Kundu, Akiva Feintuch, Shimon Vega
Recently it has been shown that experimental ELDOR spectra of amorphous glasses containing free radicals with inhomogeneously broadened EPR spectra can be analyzed using a set of coupled rate equations for the electron polarizations of frequency bins composing these spectra, named the eSD (electron spectral diffusion) model. The rate matrix defining these equations has elements depending on the microwave, the spin lattice relaxation rates and on eSD rate constants responsible for polarization exchange. In this study, we show that in addition to the static dipolar flip-flop terms in the Hamiltonian a zero-quantum electron cross-relaxation mechanism can be responsible for the polarization exchange process in our samples...
March 19, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29550878/kinematics-and-postural-muscular-activity-during-continuous-oscillating-platform-movement-in-children-and-adolescents
#14
Richard S Mills, Heidi Sveistrup
The aims of this study were to (1) characterize anticipatory and reactive postural strategies in typically developing (TD) children and adolescents; (2) determine if TD youth shift from reactive to anticipatory mechanisms based on knowledge of platform movement; and (3) determine whether TD youth further modify postural strategies when additional information about the perturbation is provided. Sixteen typically developing youth aged 7-17 years stood with eyes open on a movable platform that progressively translated anteroposteriorly (20 cm peak-to-peak) through four speeds (0...
March 17, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29549239/thalamocortical-dysrhythmia-detected-by-machine-learning
#15
Sven Vanneste, Jae-Jin Song, Dirk De Ridder
Thalamocortical dysrhythmia (TCD) is a model proposed to explain divergent neurological disorders. It is characterized by a common oscillatory pattern in which resting-state alpha activity is replaced by cross-frequency coupling of low- and high-frequency oscillations. We undertook a data-driven approach using support vector machine learning for analyzing resting-state electroencephalography oscillatory patterns in patients with Parkinson's disease, neuropathic pain, tinnitus, and depression. We show a spectrally equivalent but spatially distinct form of TCD that depends on the specific disorder...
March 16, 2018: Nature Communications
https://www.readbyqxmd.com/read/29547298/strong-exciton-plasmon-coupling-in-silver-nanowire-nanocavities
#16
Gary Beane, Brendan S Brown, Paul Johns, Tuphan Devkota, Gregory V Hartland
The interaction between plasmonic and excitonic systems and the formation of hybridized states is an area of intense interest, due to the potential to create exotic light-matter states. We report herein coupling between the leaky surface plasmon polariton (SPP) modes of single Ag nanowires and excitons of a cyanine dye (TDBC) in an open nanocavity. Silver nanowires were spin-cast onto glass coverslips, and the wavevector of the leaky SPP mode was measured by back focal plane (BFP) microscopy. Performing these measurements at different wavelengths allows the generation of dispersion curves, which show avoided crossings after deposition of a concentrated TDBC-PVA film...
March 16, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29543902/a-broadband-and-low-cross-polarization-antenna-with-a-balun-of-microstrip-line-coupling-to-slot-line
#17
Kai Sun, Deqiang Yang, Sihao Liu, Tianming Yang
In this paper, a wide-band low cross polarization antenna with a structure of microstrip line coupling to slot line as the balun is proposed. The radiation part of the antenna is fed by two pairs of parallel transmission line via a transition from a slot line which is coupled by a microstrip line. Because it is fed by parallel transmission lines, which is balanced-fed structure, the antenna can achieve an improved low cross-polarization performance. The height of the antenna is 0.146λ0 (λ0 is the wavelength of lowest frequency)...
2018: PloS One
https://www.readbyqxmd.com/read/29543746/mechanical-electrical-and-magnetic-properties-of-ferrogels-with-embedded-iron-oxide-nanoparticles-obtained-by-laser-target-evaporation-focus-on-multifunctional-biosensor-applications
#18
Felix A Blyakhman, Nikita A Buznikov, Tatyana F Sklyar, Alexander P Safronov, Elizaveta V Golubeva, Andrey V Svalov, Sergey Yu Sokolov, Grigory Yu Melnikov, Iñaki Orue, Galina V Kurlyandskaya
Hydrogels are biomimetic materials widely used in the area of biomedical engineering and biosensing. Ferrogels (FG) are magnetic composites capable of functioning as magnetic field sensitive transformers and field assisted drug deliverers. FG can be prepared by incorporating magnetic nanoparticles (MNPs) into chemically crosslinked hydrogels. The properties of biomimetic ferrogels for multifunctional biosensor applications can be set up by synthesis. The properties of these biomimetic ferrogels can be thoroughly controlled in a physical experiment environment which is much less demanding than biotests...
March 15, 2018: Sensors
https://www.readbyqxmd.com/read/29529019/perceptually-relevant-speech-tracking-in-auditory-and-motor-cortex-reflects-distinct-linguistic-features
#19
Anne Keitel, Joachim Gross, Christoph Kayser
During online speech processing, our brain tracks the acoustic fluctuations in speech at different timescales. Previous research has focused on generic timescales (for example, delta or theta bands) that are assumed to map onto linguistic features such as prosody or syllables. However, given the high intersubject variability in speaking patterns, such a generic association between the timescales of brain activity and speech properties can be ambiguous. Here, we analyse speech tracking in source-localised magnetoencephalographic data by directly focusing on timescales extracted from statistical regularities in our speech material...
March 12, 2018: PLoS Biology
https://www.readbyqxmd.com/read/29515961/lyapunov-estimation-for-high-speed-demodulation-in-multifrequency-atomic-force-microscopy
#20
David M Harcombe, Michael G Ruppert, Michael R P Ragazzon, Andrew J Fleming
An important issue in the emerging field of multifrequency atomic force microscopy (MF-AFM) is the accurate and fast demodulation of the cantilever-tip deflection signal. As this signal consists of multiple frequency components and noise processes, a lock-in amplifier is typically employed for its narrowband response. However, this demodulator suffers inherent bandwidth limitations as high-frequency mixing products must be filtered out and several must be operated in parallel. Many MF-AFM methods require amplitude and phase demodulation at multiple frequencies of interest, enabling both z -axis feedback and phase contrast imaging to be achieved...
2018: Beilstein Journal of Nanotechnology
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