keyword
MENU ▼
Read by QxMD icon Read
search

asymmetry

keyword
https://www.readbyqxmd.com/read/27913904/association-between-brain-structural-anomalies-electroencephalogram-and-history-of-seizures-in-mucopolysaccharidosis-type-ii-hunter-syndrome
#1
Ramón Ernesto Jiménez-Arredondo, Aniel Jessica Leticia Brambila-Tapia, Francisco Miguel Mercado-Silva, Martha Ortiz-Aranda, Verónica Benites-Godinez, Graciela Olmos-García-de-Alba, Luis Eduardo Figuera
Mucopolysaccharidosis type II or Hunter syndrome (MPS II) is a genetic disease that can course with intellectual impairment and central nervous system (CNS) alterations. To date, no report has documented electroencephalogram (EEG) measures associated with CNS alterations, detected by imaging studies, and the history of seizures in patients with MPS II. Therefore, we decided to search this association. We included 9 patients with MPS II and performed imaging studies of the brain to detect the presence of cortico-subcortical atrophy, enlarged subarachnoid space and supratentorial ventricular size...
December 2, 2016: Neurological Sciences
https://www.readbyqxmd.com/read/27913428/migration-pathways-of-thalamic-neurons-and-development-of-thalamocortical-connections-in-humans-revealed-by-diffusion-mr-tractography
#2
Molly Wilkinson, Tara Kane, Rongpin Wang, Emi Takahashi
The thalamus plays an important role in signal relays in the brain, with thalamocortical (TC) neuronal pathways linked to various sensory/cognitive functions. In this study, we aimed to see fetal and postnatal development of the thalamus including neuronal migration to the thalamus and the emergence/maturation of the TC pathways. Pathways from/to the thalami of human postmortem fetuses and in vivo subjects ranging from newborns to adults with no neurological histories were studied using high angular resolution diffusion MR imaging (HARDI) tractography...
December 2, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/27913407/whole-brain-analysis-reveals-increased-neuroanatomical-asymmetries-in-dementia-for-hippocampus-and-amygdala
#3
Christian Wachinger, David H Salat, Michael Weiner, Martin Reuter
Structural magnetic resonance imaging data are frequently analysed to reveal morphological changes of the human brain in dementia. Most contemporary imaging biomarkers are scalar values, such as the volume of a structure, and may miss the localized morphological variation of early presymptomatic disease progression. Neuroanatomical shape descriptors, however, can represent complex geometric information of individual anatomical regions and may demonstrate increased sensitivity in association studies. Yet, they remain largely unexplored...
December 2016: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/27912154/limb-dominance-foot-orientation-and-functional-asymmetry-during-walking-gait
#4
John D Polk, Rebecca M Stumpf, Karl S Rosengren
While healthy gait is often characterized as, or assumed to be symmetric, consistent asymmetries often exist. In this study, we test the hypotheses that asymmetries in lower limb function, as measured by ground reaction force characteristics, may be explained by differences in foot orientation or limb dominance. Peak ground reaction force (GRF) measurements, and impulses were obtained for thirty-six healthy subjects with simultaneous kinematic estimates of foot posture. Three gait tasks were performed: subjects walked i) with normal foot orientation, ii) with feet laterally rotated (outward), and iii) with feet aligned in the direction of movement (straight)...
November 18, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27912103/gait-symmetry-in-individuals-with-and-without-developmental-coordination-disorder
#5
K Wilmut, J Gentle, A L Barnett
BACKGROUND: Symmetry between the left and right side of the body during locomotion is key in a coordinated gait cycle and is also thought to be important in terms of efficiency. Although previous studies have identified aspects of the gait cycle which are atypical in children and adults with Developmental Coordination Disorder (DCD), studies have not considered whether this could be explained by asymmetrical gait. METHOD AND PROCEDURE: The current study included 62 participants with and 62 without DCD (aged 7-34 years)...
November 29, 2016: Research in Developmental Disabilities
https://www.readbyqxmd.com/read/27910665/up-down-asymmetry-measurement-of-tungsten-distribution-in-large-helical-device-using-two-extreme-ultraviolet-euv-spectrometers
#6
Y Liu, S Morita, X L Huang, T Oishi, M Goto, H M Zhang
Two space-resolved extreme ultraviolet spectrometers working in wavelength ranges of 10-130 Å and 30-500 Å have been utilized to observe the full vertical profile of tungsten line emissions by simultaneously measuring upper- and lower-half plasmas of LHD, respectively. The radial profile of local emissivity is reconstructed from the measured vertical profile in the overlapped wavelength range of 30-130 Å and the up-down asymmetry is examined against the local emissivity profiles of WXXVIII in the unresolved transition array spectrum...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910563/a-neutron-activation-spectrometer-and-neutronic-experimental-platform-for-the-national-ignition-facility-invited
#7
C B Yeamans, N Gharibyan
At the National Ignition Facility, the diagnostic instrument manipulator-based neutron activation spectrometer is used as a diagnostic of implosion performance for inertial confinement fusion experiments. Additionally, it serves as a platform for independent neutronic experiments and may be connected to fast recording systems for neutron effect tests on active electronics. As an implosion diagnostic, the neutron activation spectrometers are used to quantify fluence of primary DT neutrons, downscattered neutrons, and neutrons above the primary DT neutron energy created by reactions of upscattered D and T in flight...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910530/spectral-measurements-of-asymmetrically-irradiated-capsule-backlighters
#8
P A Keiter, R P Drake
Capsule backlighters provide a quasi-continuum x-ray spectrum over a wide range of photon energies [J. F. Hansen et al., Rev. Sci. Instrum. 79, 013504 (2008)]. Ideally one irradiates the capsule backlighter symmetrically, however, in complex experimental geometries, this is not always possible. In recent experiments we irradiated capsule backlighters asymmetrically and measured the x-ray spectrum from multiple directions. We will present time-integrated spectra over the photon energy range of 2-13 keV and time-resolved spectra over the photon energy range of 2-3 keV...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910446/self-calibration-method-of-the-bias-of-a-space-electrostatic-accelerometer
#9
Shao-Bo Qu, Xiao-Mei Xia, Yan-Zheng Bai, Shu-Chao Wu, Ze-Bing Zhou
The high precision space electrostatic accelerometer is an instrument to measure the non-gravitational forces acting on a spacecraft. It is one of the key payloads for satellite gravity measurements and space fundamental physics experiments. The measurement error of the accelerometer directly affects the precision of gravity field recovery for the earth. This paper analyzes the sources of the bias according to the operating principle and structural constitution of the space electrostatic accelerometer. Models of bias due to the asymmetry of the displacement sensing system, including the mechanical sensor head and the capacitance sensing circuit, and the asymmetry of the feedback control actuator circuit are described separately...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910388/fluence-compensated-down-scattered-neutron-imaging-using-the-neutron-imaging-system-at-the-national-ignition-facility
#10
D T Casey, P L Volegov, F E Merrill, D H Munro, G P Grim, O L Landen, B K Spears, D N Fittinghoff, J E Field, V A Smalyuk
The Neutron Imaging System at the National Ignition Facility is used to observe the primary ∼14 MeV neutrons from the hotspot and down-scattered neutrons (6-12 MeV) from the assembled shell. Due to the strong spatial dependence of the primary neutron fluence through the dense shell, the down-scattered image is convolved with the primary-neutron fluence much like a backlighter profile. Using a characteristic scattering angle assumption, we estimate the primary neutron fluence and compensate the down-scattered image, which reveals information about asymmetry that is otherwise difficult to extract without invoking complicated models...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910343/asymmetries-in-the-motional-stark-effect-emission-on-the-diii-d-tokamak
#11
B S Victor, C T Holcomb, S L Allen, W H Meyer, M A Makowski, A Thorman
Spectrometer measurements and filter upgrades to a motional Stark effect polarimeter measuring the outer half-radius of the DIII-D tokamak helped to identify asymmetries in the polarization angle of Stark-split emission. The measured polarization angle of the π components differs and is not orthogonal to the σ component. These differences persist over a range of densities and with low levels of background light. It is suggested that the difference in the polarization angle between components is from a change in the ellipticity of the emitted light across the Stark components coupled with imperfect polarization preservation from an in-vessel mirror...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909711/effect-of-partial-pegylation-on-particle-uptake-by-macrophages
#12
Lucero Sanchez, Yi Yi, Yan Yu
Controlling the internalization of synthetic particles by immune cells remains a grand challenge for developing successful drug carrier systems. Polyethylene glycol (PEG) is frequently used as a protective coating on particles to evade immune clearance, but it also hinders the interactions of particles with their intended target cells. In this study, we investigate a spatial decoupling strategy, in which PEGs are coated on only one hemisphere of particles, so that the other hemisphere is available for functionalization of cell-targeting ligands without the hindrance effect from the PEGs...
December 2, 2016: Nanoscale
https://www.readbyqxmd.com/read/27909367/ethics-and-community-based-rehabilitation-eight-ethical-questions-from-a-review-of-the-literature
#13
Stephen Clarke, Jessica Barudin, Matthew Hunt
Purpose: This article reviews the literature regarding ethics and community-based rehabilitation (CBR) with the goal of identifying and analyzing ethical considerations associated with this approach. Method: We conducted a critical interpretive review of the academic literature related to CBR in low- and middle-income countries and to indigenous communities in high-income countries. Using an inductive analysis of the collected articles, we identified five key topic areas related to ethical considerations. We then critically appraised this literature and developed eight questions that reflect areas of ethical tension, uncertainty, or debate...
2016: Physiotherapy Canada. Physiothérapie Canada
https://www.readbyqxmd.com/read/27908665/diffuse-resistance-courtship-in-the-scorpion-rhopalurus-rochai-scorpiones-buthidae
#14
Shayanne Chantall-Rocha, Hilton F Japyassú
Male-female courtship signals are frequently subject to arms races, with patterns of behaviour evolving reciprocally to manipulate the reproductive output. Female resistance should be particularly effective when asymmetrical offspring care occurs under low and unpredictable resource distribution, because this would increase maternal costs. Our hypothesis is that under these conditions females will evolve diffuse mating strategies to avoid predictable exploitation by male optimal counter tactics. Mating in scorpions is a complex process, and female resistance occurs through specific behaviours...
November 28, 2016: Behavioural Processes
https://www.readbyqxmd.com/read/27908650/musculoskeletal-conditions-in-a-pediatric-population-with-ehlers-danlos-syndrome
#15
Courtney M Stern, Michael J Pepin, Joan M Stoler, Dennis E Kramer, Samantha A Spencer, Cynthia J Stein
OBJECTIVE: To describe musculoskeletal conditions in children with Ehlers-Danlos syndrome (EDS). STUDY DESIGN: A retrospective medical record review was performed, which evaluated 205 patients with EDS (ages 6-19 years) seen in sports medicine or orthopedic clinic at a large pediatric hospital over a 5-year period. RESULTS: Female (n = 147) and male (n = 57) patients were identified (mean age 12.7 years). The most common EDS subtype (55...
November 28, 2016: Journal of Pediatrics
https://www.readbyqxmd.com/read/27908140/sequence-control-of-phase-separation-and-dewetting-in-ps-pvme-blend-thin-films-by-changing-molecular-weight-of-ps
#16
Tian Xia, Yaping Qin, Yajiang Huang, Ting Huang, Jianhui Xu, Youbing Li
The morphology evolution mechanism of polystyrene (PS)/poly (vinyl methyl ether) (PVME) blend thin films with different PS molecular weights (Mw) was studied. It was found that the morphology evolution was closely related to the molecular weight asymmetry between PS and PVME. In the film where Mw(PS) ≈ Mw(PVME), dewetting happened at the interface between the bottom layer and substrate after SD phase separation. While in the film where Mw(PS) > Mw(PVME), dewetting happened at the interface between the middle PS/PVME blend layer and bottom PVME layer near the substrate prior to phase separation...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27906843/comparison-of-resorbable-plating-systems-complications-during-degradation
#17
Dennis C Nguyen, Albert S Woo, Scott J Farber, Gary B Skolnick, Jenny Yu, Sybill D Naidoo, Kamlesh B Patel
INTRODUCTION: Several bioresorbable plating systems have become standard in pediatric craniosynostosis reconstruction. A comparison of these systems is needed to aid surgeons in the preoperative planning process. The authors aim to evaluate 1 institution's experience using Resorb-X by KLS Martin and Delta Resorbable Fixation System by Stryker (Stryker Craniomaxillofacial, Kalamazoo, MI). METHODS: A sample of patients with single-suture nonsyndromic craniosynostosis treated at St Louis Children's Hospital between 2007 and 2014 using either Resorb-X or Delta bioresorbable plating systems were reviewed...
November 30, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27906271/two-types-of-single-beam-deflection-and-asymmetric-transmission-in-photonic-structures-without-interface-corrugations
#18
Andriy E Serebryannikov, Evrim Colak, Thore Magath, Ekmel Ozbay
We study single-beam deflection and asymmetry in transmission, two aspects of the same phenomenon that appear in the topologically simple, nonsymmetric, photonic crystal (PhC)-based structures without corrugations at the interfaces. Strong diffractions enabling efficient blazing, i.e., redistribution of the incident wave energy in favor of the desired higher diffraction order(s), can be achieved owing to the defect-like layer(s) embedded in a regular slab of PhC. The main features, together with the peculiarities of the two basic transmission types and relevant coupling and deflection scenarios, are discussed, for one of which a part of the PhC works in the evanescent-wave regime...
December 1, 2016: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/27905503/advancing-ovarian-folliculometry-with-selective-plane-illumination-microscopy
#19
Hsiao-Chun Amy Lin, Rahul Dutta, Subhamoy Mandal, Alexander Kind, Angelika Schnieke, Daniel Razansky
Determination of ovarian status and follicle monitoring are common methods of diagnosing female infertility. We evaluated the suitability of selective plane illumination microscopy (SPIM) for the study of ovarian follicles. The large field of view and fast acquisition speed of our SPIM system enables rendering of volumetric image stacks from intact whole porcine ovarian follicles, clearly visualizing follicular features including follicle volume and average diameter (70 μm-2.5 mm), their spherical asymmetry parameters, size of developing cumulus oophorus complexes (40 μm-110 μm), and follicular wall thickness (90 μm-120 μm)...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27905147/reduced-nondominant-lumbar-multifidi-cross-sectional-area-is-a-precursor-of-low-back-injury-in-cricket-fast-bowlers
#20
B Olivier, N Gillion, A V Stewart, W McKinon
Asymmetry in the lumbar multifidi muscle (LM) cross-sectional area (CSA) is associated with low back injury. The aim of this prospective cohort study was to investigate the symmetry of the CSA of LM at L3, L4, and L5, in the context of simultaneous injury monitoring. Injury free, male, right-handed cricket fast bowlers playing at a nonprofessional level participated in this study. LM CSA at L3, L4, and L5 vertebral levels was measured through the use of ultrasound imaging in prone. The primary outcome measure of the study was the incidence of an injury during a cricket season of eight-month duration...
December 1, 2016: Scandinavian Journal of Medicine & Science in Sports
keyword
keyword
93551
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"