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https://www.readbyqxmd.com/read/29346747/sensorimotor-integration-for-decision-making-how-the-worm-steers
#1
Harris S Kaplan, Manuel Zimmer
Animals' movements actively shape their perception and subsequent decision making. In this issue of Neuron, Liu et al. (2018) show how C. elegans nematodes steer toward an odorant: a dedicated interneuron class integrates oscillatory olfactory signals, generated by head swings, with corollary discharge motor signals.
January 17, 2018: Neuron
https://www.readbyqxmd.com/read/29345045/the-in-vitro-release-of-cytokines-and-growth-factors-from-fibrin-membranes-produced-through-horizontal-centrifugation
#2
E S Lourenço, C F A B Mourão, P E C Leite, J M Granjeiro, M D Calasans-Maia, G G Alves
Platelet-rich fibrin (PRF) membranes are biomaterials widely used for therapeutic purposes, and canonically produced through the processing of peripheral blood with fixed-angle rotor centrifuges. In this work, we evaluate the in vitro stability and release of cytokines and growth factors when these biomaterials are produced with a horizontal swing-out clinical centrifuge. Membranes produced from the blood of 14 donors were morphologically evaluated by scanning electron microscopy and fluorescence microscopy, and their stability was assessed by photographic recording after incubation in culture medium for up to 28 days...
January 18, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29343634/fluttering-of-growing-leaves-as-a-way-to-reach-flatness-experimental-evidence-on-persea-americana
#3
Julien Derr, Renaud Bastien, Étienne Couturier, Stéphane Douady
Simple leaves show unexpected growth motions: the midrib of the leaves swings periodically in association with buckling events of the leaf blade, giving the impression that the leaves are fluttering. The quantitative kinematic analysis of this motion provides information about the respective growth between the main vein and the lamina. Our three-dimensional reconstruction of an avocado tree leaf shows that the conductor of the motion is the midrib, presenting continuous oscillations and inducing buckling events on the blade...
January 2018: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/29340004/performance-and-kinematic-differences-in-putting-between-healthy-and-disabled-elite-golfers
#4
Tomáš Gryc, Petr Stastny, František Zahálka, Wojciech Smółka, Piotr Żmijewski, Artur Gołaś, Marek Zawartka, Tomáš Malý
Golfers with disability are limited in the execution of the full golf swing, but their performance in putting may be comparable because this stroke does not demand significant strength, balance and range of motion. Therefore, the aim of this study was to compare putting performance, kinetic and kinematic consistency between golfers with different disabilities and healthy athletes. The participants consisted of three disabled athletes (perinatal cerebral palsy, multiple sclerosis, below knee lower limb amputee) and three healthy golfers (age 34 ± 4...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29340000/sprinting-change-of-direction-ability-and-horizontal-jump-performance-in-youth-runners-according-to-gender
#5
Javier Yanci, Asier Los Arcos, Daniel Castillo, Jesús Cámara
The purpose of the study was to assess straight sprinting, change of direction ability and horizontal jump performance in youth runners according to age and gender. Two hundred and fifty-five youth runners (116 boys and 139 girls) participated in this study. The athletes were divided according to their age into five groups: under 8 yr (U8), under 10 yr (U10), under 12 yr (U12), under 14 yr (U14) and under 16 yr (U16). Significant differences (p < 0.01) were found between U8 and U10 in the 5 m sprint (d = 1...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339773/postural-adaptations-to-unilateral-knee-joint-hypomobility-induced-by-orthosis-wear-during-gait-initiation
#6
A Delafontaine, P Fourcade, J L Honeine, S Ditcharles, E Yiou
Balance control and whole-body progression during gait initiation (GI) involve knee-joint mobility. Single knee-joint hypomobility often occurs with aging, orthopedics or neurological conditions. The goal of the present study was to investigate the capacity of the CNS to adapt GI organization to single knee-joint hypomobility induced by the wear of an orthosis. Twenty-seven healthy adults performed a GI series on a force-plate in the following conditions: without orthosis ("control"), with knee orthosis over the swing leg ("orth-swing") and with the orthosis over the contralateral stance leg ("orth-stance")...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29339174/the-impact-of-strabismus-surgery-on-gait-pattern-in-patients-with-congenital-or-starting-within-one-year-of-age-strabismus
#7
Enrica Sipio, Anna Dickmann, Irene Aprile, Marco Germanotta, Chiara Simbolotti, Annabella Salerni, Gustavo Savino, Luca Padua
Strabismus is a common visual disorder that negatively affects walking and balance. Therapeutic interventions for strabismus include strabismus surgery. Few studies investigated the relationship between strabismus surgery and postural control while, to the best of our knowledge, none has been conducted to assess the influence of strabismus surgery on gait. Therefore, the aim of this study was to evaluate the locomotion characteristics over patients with congenital or starting within one year of age strabismus, one month and three months after strabismus surgery...
January 12, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29336648/rhythmic-arm-swing-integrated-into-treadmill-training-in-patients-with-chronic-stroke-a-single-subject-experimental-study
#8
Tae-Woo Kang, Duck-Won Oh, Ji-Hyun Lee, Heon-Seok Cynn
Normal walking includes coordinated and controlled movement of the legs and arms. However, patients following stroke often present with inappropriate motor control which limits coordinated movement patterns of the affected limbs. This study aimed to compare the effects of rhythmic arm swing and arm fixation during treadmill walking in patients with poststroke hemiparesis. We used an alternating study design with multiple baselines across subjects. Three patients with chronic stroke participated in this study...
January 16, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29335433/conformational-landscape-of-the-prkaca-dnajb1-chimeric-kinase-the-driver-for-fibrolamellar-hepatocellular-carcinoma
#9
Michael D Tomasini, Yingjie Wang, Adak Karamafrooz, Geoffrey Li, Thijs Beuming, Jiali Gao, Susan S Taylor, Gianluigi Veglia, Sanford M Simon
In fibrolamellar hepatocellular carcinoma a single genetic deletion results in the fusion of the first exon of the heat shock protein 40, DNAJB1, which encodes the J domain, with exons 2-10 of the catalytic subunit of protein kinase A, PRKACA. This produces an enzymatically active chimeric protein J-PKAcα. We used molecular dynamics simulations and NMR to analyze the conformational landscape of native and chimeric kinase, and found an ensemble of conformations. These ranged from having the J-domain tucked under the large lobe of the kinase, similar to what was reported in the crystal structure, to others where the J-domain was dislodged from the core of the kinase and swinging free in solution...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29333946/does-inside-passing-contribute-to-the-high-incidence-of-groin-injuries-in-soccer-a-biomechanical-analysis
#10
Thomas Dupré, Johannes Funken, Ralf Müller, Kristian R L Mortensen, Filip Gertz Lysdal, Markus Braun, Hartmut Krahl, Wolfgang Potthast
Groin injuries are common in soccer and often cause time-loss from training. While groin injuries have been linked to full effort kicking, the role of inside passing is unclear. Therefore, the purpose of this study was to investigate hip joint kinematics and muscle force, stress and contraction velocity for adductor longus and gracilis during inside passing. 3D kinematics of ten soccer players (23.4 yrs; 77.5 kg; 1.81 m) were captured with a motion capture system inside a Footbonaut. Muscle force and contraction velocity were determined with AnyBody Modelling System...
January 15, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29332742/the-effects-of-dorso-lumbar-motion-restriction-on-emg-activity-of-selected-muscles-during-running
#11
Joseph J Morley, Edward Traum
The effects of restricting dorso-lumbar spine mobility on electromyographic activity of the erector spinae, quadriceps femoris, hamstrings and gastrocnemius muscles in runners was investigated. Thermoplastic casting material was fashioned into a rigid orthosis and used to restrict spinal motion during running. Volunteers ran on a treadmill at 2.78 m/sec, under normal conditions and with spinal motion restricted. Surface electromyographic data was collected during both sets of trials. Normal electromyographic data was also compared with previous authors to determine similarity with their electromyographic data...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29332730/biomechanical-factors-associated-with-running-economy-and-performance-of-elite-kenyan-distance-runners-a-systematic-review
#12
REVIEW
Nassib Tawa, Quinette Louw
BACKGROUND: Running economy (RE) is a determinant of performance in endurance sports and is a complex multi-factorial measure which reflects the combined functioning of bio-mechanical, neuro-muscular, metabolic and cardio-respiratory factors some of which are hereditary or adapt to coaching. Kenyan distance runners have dominated major global events with their unmatched performance for decades and this phenomenon has prompted several investigations aimed at establishing possible factors associated with their performance...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29331901/an-ultrasensitive-detection-of-mirna-155-in-breast-cancer-via-direct-hybridization-assay-using-two-dimensional-molybdenum-disulfide-field-effect-transistor-biosensor
#13
Samira Mansouri Majd, Abdollah Salimi, Foad Ghasemi
MicroRNAs (miRNAs), critical biomarkers of acute and chronic diseases, play key regulatory roles in many biological processes. As a result, robust assay platforms to enable an accurate and efficient detection of low-level miRNAs in complex biological samples are of great significance. In this work, a label-free and direct hybridization assay using molybdenum disulfide (MoS2) field-effect transistor (FET) biosensor has been developed for ultrasensitive detection of miRNA-155 as a breast cancer biomarker in human serum and cell-line samples...
January 6, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29331628/getting-into-the-swing-of-things-an-investigation-into-rhythmic-unimanual-coordination-in-typically-developing-children
#14
David Gaul, Johann Issartel
Unimanual coordination is a vital component of everyday life and underpins successful engagement of many activities of daily living and physical activity participation. The ability to coordinate with environmental stimuli has been extensively studied in adults in a variety of situations. However, we know little about these processes in children and even less about how these processes change as age increases. This paper examines children's performance in a rhythmic unimanual coordination task using a handheld pendulum...
January 10, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29331489/modulation-of-lower-extremity-joint-stiffness-work-and-power-at-different-walking-and-running-speeds
#15
Li Jin, Michael E Hahn
Locomotion task and speed changes affect dynamic joint function. Walking and running require different coordination patterns of lower extremity joint mechanics. These coordination differences can result in measurable changes in kinematic and kinetic patterns. When locomotion speed changes, the functional role and movement strategy of each joint is altered. A deeper understanding of joint level mechanics and functional interactions will benefit rehabilitation programs and assistive device development. In this study, joint stiffness, joint mechanical work and power were assessed, as they relate to dynamic function of joints during locomotion...
January 10, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29330669/hip-and-groin-injuries-in-baseball-players
#16
REVIEW
Ryan A Mlynarek, Struan H Coleman
PURPOSE OF REVIEW: To discuss the clinical significance of the most common hip and groin injuries in baseball players, as well as an algorithmic approach to diagnosis and treatment of these injuries. RECENT FINDINGS: (a) Limitations in throwing velocity, pitch control, and bat swing speed may be secondary to decreased mobility and strength within the proximal kinetic chain, which must harness power from the lower extremities and core. (b) Approximately 5.5% of all baseball injuries per year involve the hip/groin and may lead to a significant amount of time spent on the disabled list...
January 12, 2018: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/29329123/golf-injuries-epidemiology-pathophysiology-and-treatment
#17
Ioannis C Zouzias, Jeff Hendra, Jason Stodelle, Orr Limpisvasti
Increasing numbers of people are playing golf. Golf is a unique sport in that the ability to participate at a high level is not limited by age. In addition, participants tend to play more rather than less as they grow older. Injuries can occur at any point during the golf swing, from takeaway through follow-through. Upper extremity injuries can affect the hands, elbow, and shoulder and are usually a result of the golf swing at impact. Injuries are also common in the lower back as well as the lower extremities...
January 11, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29324873/a-new-strength-assessment-to-evaluate-the-association-between-muscle-weakness-and-gait-pathology-in-children-with-cerebral-palsy
#18
Marije Goudriaan, Angela Nieuwenhuys, Simon-Henri Schless, Nathalie Goemans, Guy Molenaers, Kaat Desloovere
AIM: The main goal of this validation study was to evaluate whether lower limb muscle weakness and plantar flexor rate of force development (RFD) related to altered gait parameters in children with cerebral palsy (CP), when weakness was assessed with maximal voluntary isometric contractions (MVICs) in a gait related test position. As a subgoal, we analyzed intra- and intertester reliability of this new strength measurement method. METHODS: Part 1 -Intra- and intertester reliability were determined with the intra-class correlation coefficient (ICC2,1) in 10 typical developing (TD) children (age: 5-15)...
2018: PloS One
https://www.readbyqxmd.com/read/29323536/high-positive-end-expiratory-pressure-renders-spontaneous-effort-non-injurious
#19
Caio C A Morais, Yukiko Koyama, Takeshi Yoshida, Glauco M Plens, Susimeire Gomes, Cristhiano L A S Lima, Ozyres P Ramos, Sérgio M Pereira, Naomasa Kawaguchi, Hirofumi Yamamoto, Akinori Uchiyama, João B Borges, Marcos F Vidal Melo, Mauro R Tucci, Marcelo B P Amato, Brian P Kavanagh, Eduardo L V Costa, Yuji Fujino
RATIONALE: In ARDS, atelectatic 'solid-like' lung tissue impairs transmission of negative 'swings' in pleural pressure (Ppl) resulting from diaphragmatic contraction. The localization of more negative Ppl proportionally increases dependent lung stretch by drawing gas either from other lung regions, e.g., non-dependent lung (Pendelluft) or from the ventilator. Lowering of the level of spontaneous effort and/or converting solid-like to fluid-like lung might render spontaneous effort non-injurious...
January 11, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29318402/atomic-layer-deposition-of-indium-oxide-nano-films-for-thin-film-transistors
#20
Qian Ma, He-Mei Zheng, Yan Shao, Bao Zhu, Wen-Jun Liu, Shi-Jin Ding, David Wei Zhang
Atomic-layer-deposition (ALD) of In2O3 nano-films has been investigated using cyclopentadienyl indium (InCp) and hydrogen peroxide (H2O2) as precursors. The In2O3 films can be deposited preferentially at relatively low temperatures of 160-200 °C, exhibiting a stable growth rate of 1.4-1.5 Å/cycle. The surface roughness of the deposited film increases gradually with deposition temperature, which is attributed to the enhanced crystallization of the film at a higher deposition temperature. As the deposition temperature increases from 150 to 200 °C, the optical band gap (Eg) of the deposited film rises from 3...
January 9, 2018: Nanoscale Research Letters
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