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https://www.readbyqxmd.com/read/28324752/vertical-ground-reaction-force-during-standing-and-walking-are-they-related-to-bone-mineral-density-left-right-asymmetries
#1
Marina Brozgol, Mira Arbiv, Anat Mirelman, Talia Herman, Jeffrey M Hausdorff, Nachum Vaisman
Osteoporosis is a systemic skeletal disease that is characterized by reduced bone mass, deterioration of bone tissue and skeletal fragility. The purpose of the current study was to determine whether asymmetrical femur bone mineral density (BMD) is associated with asymmetrical gait and standing. We compared measures of gait and standing asymmetry in subjects with (n=38) and without (n=11) significant left-right differences in BMD. Participants walked for 72m at their comfortable speed and stood quietly for 60s while outfitted with pressure-sensitive insoles...
March 7, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28324234/damage-induced-alarm-cues-influence-lateralized-behaviour-but-not-the-relationship-between-behavioural-and-habenular-asymmetry-in-convict-cichlids-amatitlania-nigrofasciata
#2
Michele K Moscicki, Peter L Hurd
Cerebral lateralization, the partitioning of functions into a certain hemisphere of the brain, is ubiquitous among vertebrates. Evidence suggests that the cognitive processing of a stimulus is performed with a specific hemisphere depending in part upon the emotional valence of the stimulus (i.e. whether it is appetitive or aversive). Recent work has implicated a predominance of right-hemisphere processing for aversive stimuli. In fish with laterally placed eyes, the preference to view an object with a specific eye has been used as a proxy for assessing cerebral lateralization...
March 21, 2017: Animal Cognition
https://www.readbyqxmd.com/read/28320195/combined-use-of-dopamine-transporter-imaging-dat-spect-and-123-i-metaiodobenzylguanidine-mibg-myocardial-scintigraphy-for-diagnosing-parkinson-s-disease
#3
Fumihito Yoshii, Masafuchi Ryo, Yasuhiko Baba, Takashi Koide, Jun Hashimoto
BACKGROUND: To examine whether combined use of (123)I-FP-CIT dopamine transporter single photon emission computed tomography (DAT-SPECT) and (123)I-MIBG myocardial scintigraphy (MIBG) is superior to either modality alone for diagnosing Parkinson's disease (PD). METHODS: Patients with probable PD (n=120) who underwent both DAT-SPECT and MIBG myocardial scintigraphy within short intervals were enrolled. Specific binding ratio (SBR) of DAT-SPECT images and heart-to-mediastinum (H/M) ratio of MIBG images were used as quantitative measures...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28320059/effects-of-treadmill-exercise-on-advanced-osteoarthritis-pain-in-rats
#4
Joshua Allen, Ian Imbert, Joshua Havelin, Terry Henderson, Glenn Stevenson, Lucy Liaw, Tamara King
OBJECTIVE: Exercise is commonly recommended for patients with osteoarthritis (OA) pain. However, whether exercise is beneficial in ameliorating persistent NSAID-resistant ongoing pain associated with advanced OA is unknown. METHODS: Rats treated with intra-articular monosodium iodoacetate (MIA) or saline underwent treadmill exercise or remained sedentary starting 10 days post-injection. Tactile sensory thresholds and weight bearing were assessed followed by radiographs at weekly intervals...
March 20, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28319153/a-general-model-for-metabolic-scaling-in-self-similar-asymmetric-networks
#5
Alexander Byers Brummer, Van M Savage, Brian J Enquist
How a particular attribute of an organism changes or scales with its body size is known as an allometry. Biological allometries, such as metabolic scaling, have been hypothesized to result from selection to maximize how vascular networks fill space yet minimize internal transport distances and resistances. The West, Brown, Enquist (WBE) model argues that these two principles (space-filling and energy minimization) are (i) general principles underlying the evolution of the diversity of biological networks across plants and animals and (ii) can be used to predict how the resulting geometry of biological networks then governs their allometric scaling...
March 20, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28319132/measuring-subglacial-bedform-orientation-length-and-longitudinal-asymmetry-method-assessment
#6
Marco G Jorge, Tracy A Brennand
Geospatial analysis software provides a range of tools that can be used to measure landform morphometry. Often, a metric can be computed with different techniques that may give different results. This study is an assessment of 5 different methods for measuring longitudinal, or streamlined, subglacial bedform morphometry: orientation, length and longitudinal asymmetry, all of which require defining a longitudinal axis. The methods use the standard deviational ellipse (not previously applied in this context), the longest straight line fitting inside the bedform footprint (2 approaches), the minimum-size footprint-bounding rectangle, and Euler's approximation...
2017: PloS One
https://www.readbyqxmd.com/read/28318377/root-hydrotropism-and-thigmotropism-in-arabidopsis-thaliana-are-differentially-controlled-by-redox-status
#7
Georgina Ponce, Gabriel Corkidi, Delfeena Eapen, Fernando Lledias, Luis Cárdenas, Gladys Cassab
Factors that affect the direction of root growth in response to environmental signals influence crop productivity. We analyzed the root tropic responses of thioredoxin (trxs), thigmotropic (wav2-1), and hydrotropic (ahr1 and nhr1) Arabidopsis thaliana mutants treated with low concentrations of paraquat (PQ), which induces mild oxidative stress, and established a new method for evaluating root waviness (root bending effort, RBE). This method estimates root bending by measuring and summing local curvature over the whole length of the root, regardless of the asymmetry of the wavy pattern under thigmostimulation...
March 20, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28318128/proton-mr-spectroscopy-in-patients-with-nonlesional-insular-cortex-epilepsy-confirmed-by-invasive-eeg-recordings
#8
Yasmine Aitouche, Steve A Gibbs, Guillaume Gilbert, Olivier Boucher, Alain Bouthillier, Dang Khoa Nguyen
BACKGROUND AND PURPOSE: Recent studies suggest that a nonnegligible proportion of drug-resistant epilepsy surgery candidates have an epileptogenic zone that involves the insula. We aimed to examine the value of proton magnetic resonance spectroscopy ((1) H-MRS) in identifying patients with insular cortex epilepsy. METHODS: Patients with possible nonlesional drug-refractory insular epilepsy underwent a voxel-based (1) H-MRS study prior to an intracranial electroencephalographic (EEG) study...
March 20, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28318005/transport-of-underdamped-active-particles-in-ratchet-potentials
#9
Bao-Quan Ai, Feng-Guo Li
We study the rectified transport of underdamped active noninteracting particles in an asymmetric periodic potential. It is found that the ratchet effect of active noninteracting particles occurs in a single direction (along the easy direction of the substrate asymmetry) in the overdamped limit. However, when the inertia is considered, it is possible to observe reversals of the ratchet effect, where the motion is along the hard direction of the substrate asymmetry. By changing the friction coefficient or the self-propulsion force, the average velocity can change its direction several times...
March 20, 2017: Soft Matter
https://www.readbyqxmd.com/read/28316288/donor-site-morbidities-resulting-from-conchal-cartilage-harvesting-in-rhinoplasty
#10
M Y Lan, J P Park, Y J Jang
OBJECTIVE: Conchal cartilage is frequently used in rhinoplasty, but donor site morbidity data are seldom reported. This study aimed to investigate the complications of conchal cartilage harvesting in rhinoplasty. METHODS: A retrospective chart review of 372 patients who underwent conchal cartilage harvesting for rhinoplasty was conducted. Data regarding patient demographics, types of nasal deformities, graft usage and complications were analysed. RESULTS: A total of 372 patients who underwent conchal cartilage harvesting for rhinoplasty were enrolled...
March 20, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28315957/right-sided-dominance-of-the-bilateral-vestibular-system-in-the-upper-brainstem-and-thalamus
#11
Marianne Dieterich, V Kirsch, T Brandt
MRI diffusion tensor imaging tractography was performed on the bilateral vestibular brainstem pathways, which run from the vestibular nuclei via the paramedian and posterolateral thalamic subnuclei to the parieto-insular vestibular cortex. Twenty-one right-handed healthy subjects participated. Quantitative analysis revealed a rope-ladder-like system of vestibular pathways in the brainstem with crossings at pontine and mesencephalic levels. Three structural types of right-left fiber distributions could be delineated: (1) evenly distributed pathways at the lower pontine level from the vestibular nuclei to the pontine crossing, (2) a moderate, pontomesencephalic right-sided lateralization between the pontine and mesencephalic crossings, and (3) a further increase of the right-sided lateralization above the mesencephalic crossing leading to the thalamic vestibular subnuclei...
March 18, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28314972/-rare-diseases-with-clinical-relevance-the-silver-russell-syndrome
#12
C Neissner, C Schepp, W H Rösch
The Silver-Russell syndrome (SRS) is a rare imprinting disease associated with pre- and postnatal growth retardation, craniofacial features, and asymmetry. Genitourinary abnormalities are seen in up to 20% of affected individuals. Apart from structural renal anomalies, cryptorchidism and hypospadias occur frequently in boys, while girls often have anomalies similar to those in Mayer-Rokitansky-Küster-Hauser syndrome with congenital hypoplasia or aplasia of the uterus and upper part of the vagina. Frequently hypospadias repair and orchiopexy are difficult because of lack of buccal mucosa due to facial dysmorphism and intraabdominal position of the testicles, respectively...
March 17, 2017: Der Urologe. Ausg. A
https://www.readbyqxmd.com/read/28314520/interaction-between-postural-asymmetry-and-visual-feedback-effects-in-undisturbed-upright-stance-control-in-healthy-adults
#13
Patrice R Rougier, Samir Boudrahem
OBJECTIVES: The technique of additional visual feedback has been shown to significantly decrease the center of pressure (CP) displacements of a standing subject. Body-weight asymmetry is known to increase postural instability due to difficulties in coordinating the reaction forces exerted under each foot and is often a cardinal feature of various neurological and traumatic diseases. To examine the possible interactions between additional visual feedback and body-weight asymmetry effects, healthy adults were recruited in a protocol with and without additional visual feedback, with different levels of body-weight asymmetry...
March 14, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28314051/electroosmotic-flow-measurements-in-a-freely-suspended-liquid-film-experiments-and-numerical-simulations
#14
Abdulkadir Hussein Sheik, H C Hemaka Bandulasena, Victor Starov, Anna Trybala
Fluid flow profiles in free liquid films stabilised by anionic and cationic surfactants under an external electric field were investigated. Depthwise velocity fields were measured at the mid region of the free liquid film by confocal μ-PIV and corresponding numerical simulations were performed using Finite Element Method (FEM) to model the system. Depthwise change in velocity profiles was observed with electroosmotic flow dominating in the vicinity of the gas-liquid and solid-liquid interfaces while backpressure drives fluid in the opposite direction at the core of the film...
March 17, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28306641/a-kinematic-symmetry-index-of-gait-pattern-between-older-adults-with-and-without-low-back-pain
#15
Paul S Sung, Pamela Danial
STUDY DESIGN: Cross-sectional study. OBJECTIVE: To investigate the symmetry index for limb support patterns in right limb dominant older adults with and without low back pain (LBP). SUMMARY OF BACKGROUND DATA: The effects of bilateral asymmetry on gait performance were reported; however, there is a lack of understanding on kinematic symmetry to assess subjects with LBP. This asymmetry might be related to increased compensatory patterns to the dominant side in subjects with LBP...
March 16, 2017: Spine
https://www.readbyqxmd.com/read/28306293/particle-hole-asymmetry-in-the-cuprate-pseudogap-measured-with-time-resolved-spectroscopy
#16
Tristan L Miller, Wentao Zhang, Hiroshi Eisaki, Alessandra Lanzara
One of the most puzzling features of high-temperature cuprate superconductors is the pseudogap state, which appears above the temperature at which superconductivity is destroyed. There remain fundamental questions regarding its nature and its relation to superconductivity. But to address these questions, we must first determine whether the pseudogap and superconducting states share a common property: particle-hole symmetry. We introduce a new technique to test particle-hole symmetry by using laser pulses to manipulate and measure the chemical potential on picosecond time scales...
March 3, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28306258/liquid-structure-of-bis-trifluoromethylsulfonyl-imide-based-ionic-liquids-assessed-by-ft-ir-spectroscopy
#17
Cassie Kimble, Christopher M Burba
Ionic liquids are a fertile and active area of research, in part, due to the unique properties these solvents offer over traditional molecular solvents. Since these properties are rooted in the fundamental ion-ion interactions that govern liquid structure, there is a strong motivation to characterize liquid structure. Infrared spectroscopy is a standard analytical tool for assessing the liquid structure, for the intramolecular vibrational modes of the composing the materials are often quite sensitive to the local environment about a given ion...
March 17, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28306164/effects-of-positive-emotion-extraversion-and-dopamine-on-cognitive-stability-flexibility-and-frontal-eeg-asymmetry
#18
Jan Wacker
The influence of positive emotions on the balance between cognitive stability and flexibility has been suggested to (a) differ among various positive emotional/motivational states (e.g., of varying approach motivation intensity), and (b) be mediated by brain dopamine (DA). Frontal EEG alpha asymmetry (ASY) is considered an indicator of approach motivational states and may be modulated by DA. The personality trait of extraversion is strongly linked to positive emotions and is now thought to reflect DA-based individual differences in incentive/approach motivation...
March 17, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28304284/scanning-gate-microscopy-of-magnetic-focusing-in-graphene-devices-quantum-vs-classical-simulation
#19
Marko D Petrović, Slaviša Milovanović, Francois Peeters
We compare classical versus quantum electron transport in recently investigated magnetic focusing devices [S. Bhandari et al., Nano Lett. 16, 1690 (2016)] exposed to the perturbing potential of a scanning gate microscope (SGM). Using the Landauer-Büttiker formalism for a multi-terminal device, we calculate resistance maps that are obtained as the SGM tip is scanned over the sample. There are three unique regimes in which the scanning tip can operate (focusing, repelling, and mixed regime) which are investigated...
March 17, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28303375/diagnosing-carotid-near-occlusion-with-1%C3%A2-mm-side-to-side-asymmetry-a-tough-task-made-too-easy
#20
EDITORIAL
Elias Johansson, Allan Fox
No abstract text is available yet for this article.
March 16, 2017: Neuroradiology
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