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https://www.readbyqxmd.com/read/28439779/searching-for-an-internal-representation-of-stimulus-kinematics-in-the-response-of-ventral-paraflocculus-purkinje-cells
#1
Pablo M Blazquez, GyuTae Kim, Tatyana A Yakusheva
Motor control theories propose that the central nervous system builds internal representations of the motion of both our body and external objects. These representations, called forward models, are essential for accurate motor control. For instance, to produce a precise reaching movement to catch a flying ball, the central nervous system must build predictions of the current and future states of both the arm and the ball. Accumulating evidence suggests that the cerebellar cortex contains a forward model of an individual's body movement...
April 24, 2017: Cerebellum
https://www.readbyqxmd.com/read/28438318/the-affinities-of-homo-floresiensis-based-on-phylogenetic-analyses-of%C3%A2-cranial-dental-and-postcranial-characters
#2
Debbie Argue, Colin P Groves, Michael S Y Lee, William L Jungers
Although the diminutive Homo floresiensis has been known for a decade, its phylogenetic status remains highly contentious. A broad range of potential explanations for the evolution of this species has been explored. One view is that H. floresiensis is derived from Asian Homo erectus that arrived on Flores and subsequently evolved a smaller body size, perhaps to survive the constrained resources they faced in a new island environment. Fossil remains of H. erectus, well known from Java, have not yet been discovered on Flores...
April 19, 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28436506/electrostatic-interactions-between-ions-near-thomas-fermi-substrates-and-the-surface-energy-of-ionic-crystals-at-imperfect-metals
#3
V Kaiser, J Comtet, A Niguès, A Siria, B Coasne, L Bocquet
The electrostatic interaction between two charged particles is strongly modified in the vicinity of a metal. This situation is usually accounted for by the celebrated image charges approach, which was further extended to account for the electronic screening properties of the metal at the level of the Thomas-Fermi description. In this paper we build upon a previous approach [M. A. Vorotyntsev and A. A. Kornyshev, Zh. Eksp. Teor. Fiz., 1980, 78(3), 1008-1019] and successive works to calculate the 1-body and 2-body electrostatic energy of ions near a metal in terms of the Thomas-Fermi screening length...
April 24, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28431912/osteosarcopenic-obesity-prevalence-and-relation-with-frailty-and-physical-performance-in-middle-aged-and-older-women
#4
Claudia Szlejf, Lorena Parra-Rodríguez, Oscar Rosas-Carrasco
OBJECTIVES: The aims of this study were to determine the prevalence of osteosarcopenic obesity (OSO) and to investigate its association with frailty and physical performance in Mexican community-dwelling middle-aged and older women. DESIGN: Cross-sectional analysis of a prospective cohort. SETTING: The FraDySMex study, a 2-round evaluation of community-dwelling adults from 2 municipalities in Mexico City. PARTICIPANTS: Participants were 434 women aged 50 years or older, living in the designated area in Mexico City...
April 18, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28431039/genomic-data-for-78-chickens-from-14-populations
#5
Diyan Li, Tiandong Che, Binlong Chen, Shilin Tian, Xuming Zhou, Guolong Zhang, Miao Li, Uma Gaur, Yan Li, Majing Luo, Long Zhang, Zhongxian Xu, Xiaoling Zhao, Huadong Yin, Yan Wang, Long Jin, Qianzi Tang, Huailiang Xu, Mingyao Yang, Rongjia Zhou, Ruiqiang Li, Qing Zhu, Mingzhou Li
Background: Since the domestication of the red jungle fowls ( Gallus gallus ) (dating back to ∼10,000 B.P.) in Asia, domestic chickens ( Gallus gallus domesticus ) have been subjected to the combined effects of natural selection and human-driven artificial selection; this has resulted in marked phenotypic diversity in a number of traits, including behavior, body composition, egg production and skin color. Population genomic variations through diversifying selection have not been fully investigated...
April 18, 2017: GigaScience
https://www.readbyqxmd.com/read/28430971/association-between-native-american-owned-casinos-and-the-prevalence-of-large-for-gestational-age-births
#6
Jessica C Jones-Smith, William H Dow, Vanessa M Oddo
Background: A small number of studies have used a natural experiment approach to examine the health impacts of increased economic resources stemming from Native American-owned casinos. We build on this work by examining whether casinos are associated with obesity-related health in utero . Methods: We examined whether casino openings or expansion (as proxy for increased economic resources) are associated with a decreased likelihood of infants being born large-for-gestational-age (LGA), an important risk factor for childhood overweight/obesity...
April 19, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/28430139/the-metalloproteinase-adam28-promotes-metabolic-dysfunction-in-mice
#7
Lakshini Herat, Caroline Rudnicka, Yasunori Okada, Satsuki Mochizuki, Markus Schlaich, Vance Matthews
Obesity and diabetes are major causes of morbidity and mortality globally. The current study builds upon our previous association studies highlighting that A Disintegrin And Metalloproteinase 28 (ADAM28) appears to be implicated in the pathogenesis of obesity and type 2 diabetes in humans. Our novel study characterised the expression of ADAM28 in mice with the metabolic syndrome and used molecular inhibition approaches to investigate the functional role of ADAM28 in the pathogenesis of high fat diet-induced obesity...
April 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28429999/beneficial-effects-of-oral-supplementation-with-ovoderm-on-human-skin-physiology-two-pilot-studies
#8
Andrés Aguirre, Erena Gil-Quintana, Marisa Fenaux, Sandra Erdozain, Itziar Sarria
Collagens and hyaluronic acid have long been used in pharmaceuticals and food supplements for the improvement of skin elasticity and hydration. These compounds provide the building blocks of the skin. Ovoderm is an oral supplement obtained from eggshells that contains naturally occurring collagen and glycosaminoglycans, such as hyaluronic acid. We evaluated the efficacy of Ovoderm on skin biophysical parameters related to cutaneous aging such as elasticity, hydration, and pigmentation. Two pilot studies were run to assess the effect of daily oral supplementation with 300 mg Ovoderm on skin parameters...
April 21, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28429061/natural-resource-management-schemes-as-entry-points-for-integrated-landscape-approaches-evidence-from-ghana-and-burkina-faso
#9
Samson Foli, Mirjam A F Ros-Tonen, James Reed, Terry Sunderland
In recognition of the failures of sectoral approaches to overcome global challenges of biodiversity loss, climate change, food insecurity and poverty, scientific discourse on biodiversity conservation and sustainable development is shifting towards integrated landscape governance arrangements. Current landscape initiatives however very much depend on external actors and funding, raising the question of whether, and how, and under what conditions, locally embedded resource management schemes can serve as entry points for the implementation of integrated landscape approaches...
April 20, 2017: Environmental Management
https://www.readbyqxmd.com/read/28429013/a-stochastic-model-for-directional-changes-of-swimming-bacteria
#10
G Fier, D Hansmann, R C Buceta
In this work we introduce a stochastic model to describe directional changes in the movement of swimming bacteria. We use the probability density function (PDF) of turn angles, measured on tumbling wild-type E. coli, to build a Langevin equation for the deflection of the bacterial body swimming in isotropic media. We have solved this equation analytically by means of the Green function method and shown that three parameters are sufficient to describe the movement: the characteristic time, the steady-state solution and the control parameter...
April 21, 2017: Soft Matter
https://www.readbyqxmd.com/read/28427051/subjective-time-perceptions-and-aging-well-a-review-of-concepts-and-empirical-research-a-mini-review
#11
Martina Gabrian, Anne J Dutt, Hans-Werner Wahl
Human beings impose subjective, time-related interpretations on their existence, and the experience of time is a major aspect of lifespan development. In this mini-review, we understand subjective time as the way individuals subjectively perceive and evaluate the passing of their personal "objective" lifetime. A broad range of constructs and operationalizations has been developed in (gero-) psychology to capture subjective time, including future time perspective, personal goals, or autobiographical memories...
April 21, 2017: Gerontology
https://www.readbyqxmd.com/read/28421319/inferior-vena-cava-segmentation-with-parameter-propagation-and-graph-cut
#12
Zixu Yan, Feng Chen, Fa Wu, Dexing Kong
PURPOSE: The inferior vena cava (IVC) is one of the vital veins inside the human body. Accurate segmentation of the IVC from contrast-enhanced CT images is of great importance. This extraction not only helps the physician understand its quantitative features such as blood flow and volume, but also it is helpful during the hepatic preoperative planning. However, manual delineation of the IVC is time-consuming and poorly reproducible. METHODS: In this paper, we propose a novel method to segment the IVC with minimal user interaction...
April 18, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28421215/control-of-supramolecular-nanoassemblies-by-tuning-the-interactions-of-bent-shaped-rod-coil-molecules
#13
Shengnan You, Keli Zhong, Long Yi Jin
Rod-coil molecules 1a, 1b and 2a, 2b, consisting of biphenyl and phenyl units connected by an acetylene bond as the rod segment and oligo(ethylene glycol) (OEG) as the coil segment, were synthesized and characterized. Molecules 1a and 1b incorporate a butoxy group at the apex of their bent-shaped rigid building blocks, while both 1b and 2b contain a lateral methyl group between the rod and coil segments. The self-assembling behavior of these molecules was investigated using DSC, SAXS, CD, AFM, and TEM in bulk and aqueous solutions...
April 19, 2017: Soft Matter
https://www.readbyqxmd.com/read/28420215/a-phonocardiographic-based-fiber-optic-sensor-and-adaptive-filtering-system-for-noninvasive-continuous-fetal-heart-rate-monitoring
#14
Radek Martinek, Jan Nedoma, Marcel Fajkus, Radana Kahankova, Jaromir Konecny, Petr Janku, Stanislav Kepak, Petr Bilik, Homer Nazeran
This paper focuses on the design, realization, and verification of a novel phonocardiographic- based fiber-optic sensor and adaptive signal processing system for noninvasive continuous fetal heart rate (fHR) monitoring. Our proposed system utilizes two Mach-Zehnder interferometeric sensors. Based on the analysis of real measurement data, we developed a simplified dynamic model for the generation and distribution of heart sounds throughout the human body. Building on this signal model, we then designed, implemented, and verified our adaptive signal processing system by implementing two stochastic gradient-based algorithms: the Least Mean Square Algorithm (LMS), and the Normalized Least Mean Square (NLMS) Algorithm...
April 18, 2017: Sensors
https://www.readbyqxmd.com/read/28419292/design-and-testing-of-2-novel-scores-that-predict-global-sagittal-alignment-utilizing-cervical-or-lumbar-plain-radiographs
#15
Ezequiel Goldschmidt, Federico Angriman, Bruno Ferreyro, Nitin Agarwal, James Zhou, Katherine Chen, Zachary J Tempel, Peter C Gerszten, Adam S Kanter, David O Okonkwo, Peter Passias, Justin Scheer, Themistocles Protopsaltis, Virginie Lafage, Renaud Lafage, Frank Schwab, Shay Bess, Chris Ames, Justin S Smith, Douglas Burton, D Kojo Hamilton
BACKGROUND: Global sagittal deformity is an established cause of disability. However, measurements of sagittal alignment are often ignored when patients present with symptoms localizing to the cervical or lumbar spine. OBJECTIVE: To develop scoring scales to predict the risk of sagittal malalignment in patients with only cervical or lumbar spine radiographs. METHODS: A retrospective review of a prospectively maintained multicenter adult spinal deformity database was performed...
April 17, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28418508/validation-method-for-motion-segments-of-the-lower-cervical-spine-kinematic-and-kinetic-response-for-quasi-static-and-dynamic-loading
#16
Jeffrey B Barker, Duane S Cronin, Roger W Nightingale
Advanced computational human body models enabling enhanced occupant safety require verification and validation at different levels or scales. Specifically, the motion segments, which are the building blocks of a detailed neck model, must be validated with representative experimental data to have confidence in segment and, ultimately, full neck model response. In this study, we demonstrate the importance of objective validation for quasi-static and dynamic loading. Finite element segment models at all levels in the lower human cervical spine were developed from scans of a 26 year old male subject...
April 13, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28418006/radiomics-based-prognosis-analysis-for-non-small-cell-lung-cancer
#17
Yucheng Zhang, Anastasia Oikonomou, Alexander Wong, Masoom A Haider, Farzad Khalvati
Radiomics characterizes tumor phenotypes by extracting large numbers of quantitative features from radiological images. Radiomic features have been shown to provide prognostic value in predicting clinical outcomes in several studies. However, several challenges including feature redundancy, unbalanced data, and small sample sizes have led to relatively low predictive accuracy. In this study, we explore different strategies for overcoming these challenges and improving predictive performance of radiomics-based prognosis for non-small cell lung cancer (NSCLC)...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28415067/effect-of-whey-protein-in-conjunction-with-a-caloric-restricted-diet-and-resistance-training
#18
Wesley D Dudgeon, Elizabeth P Kelley, Timothy P Scheett
Dudgeon, WD, Kelley, EP, and Scheett, TP. Effect of whey protein in conjunction with a caloric-restricted diet and resistance training. J Strength Cond Res 31(5): 1353-1361, 2017-Caloric-restricted weight loss, especially rapid weight loss, results from a decrease in both lean and fat mass (FM). The goal for many is to lose FM while retaining lean body mass (LBM) and muscular performance thus many turn to supplements. Sixteen resistance-trained men (24 ± 1.6 years of age) completed a 4 d·wk body building style split resistance training program for 8 weeks in conjunction with a pre-exercise, periexercise, and postexercise ingestion of whey protein (WHEY) nutritional supplement or carbohydrate (CON)-based nutritional supplement...
May 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28409253/review-of-key-concepts-in-magnetic-resonance-physics
#19
REVIEW
Michael M Moore, Taylor Chung
MR physics can be a challenging subject for practicing pediatric radiologists. Although many excellent texts provide very comprehensive reviews of the field of MR physics at various levels of understanding, the authors of this paper explain several key concepts in MR physics that are germane to clinical practice in a non-rigorous but practical fashion. With the basic understanding of these key concepts, practicing pediatric radiologists can build on their knowledge of current clinical MR techniques and future advances in MR applications...
May 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28407522/physiological-arousal-accompanying-postural-responses-to-external-perturbations-after-stroke
#20
C L Pollock, M G Carpenter, M A Hunt, A Gallina, T M Vieira, T D Ivanova, S J Garland
OBJECTIVE: The purpose of this study was to examine simultaneously the level of physiological arousal and the postural response to external perturbations in people post-stroke compared to age-matched controls to build a more comprehensive understanding of the effect of stroke on postural control and balance self-efficacy. METHODS: Participants stood with each foot on separate force platforms. Ten applications of loads of 2% body weight at the hips perturbed the participant anteriorly under two conditions: investigator-triggered or self-triggered (total 20)...
March 18, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
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