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Local field potential

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https://www.readbyqxmd.com/read/28724024/stigma-related-to-bipolar-disorder-in-the-perception-of-psychiatrists-from-belo-horizonte-minas-gerais-state-brazil
#1
Adauto Silva Clemente, Wagner Jorge Dos Santos, Rodrigo Nicolato, Josélia Oliveira Araújo Firmo
This research sought to understand meanings and implications of the stigma related to bipolar disorder in relation to social processes and local cultural value systems. Seven semidirected individual interviews were performed with psychiatrists (from Belo Horizonte city, Minas Gerais State, Brazil) and analyzed with referential from the Medical Anthropology. Some potential stigmatizing views about bipolar disorder patients were endorsed by respondents related to biomedical model of bipolar disorder. They claimed about the extreme trivialization of this diagnosis nowadays and observed that, in spite of the mitigation of stigma related to bipolar disorder over time, it remains an important issue, especially at labor fields and as a cause of refusal of treatment...
July 13, 2017: Cadernos de Saúde Pública
https://www.readbyqxmd.com/read/28722555/understanding-the-state-of-health-policy-and-systems-research-in-west-africa-and-capacity-strengthening-needs-scoping-of-peer-reviewed-publications-trends-and-patterns-1990-2015
#2
Selina Defor, Aku Kwamie, Irene Akua Agyepong
BACKGROUND: The need for locally-driven, locally-generated evidence to guide health policy and systems decision-making and implementation in West Africa remains urgent. Thus, health policy and systems research (HPSR) is a field with great potential for addressing many of the sub-region's intransigent health challenges. This paper presents an analysis of trends and patterns of peer-reviewed HPSR publications across the Economic Community of West African States (ECOWAS), to help understand trends and patterns of HPSR publication and the degree of involvement of West African researchers in HPSR evidence generation in the sub-region...
July 12, 2017: Health Research Policy and Systems
https://www.readbyqxmd.com/read/28722181/historical-biome-distribution-and-recent-human-disturbance-shape-the-diversity-of-arbuscular-mycorrhizal-fungi
#3
Meelis Pärtel, Maarja Öpik, Mari Moora, Leho Tedersoo, Robert Szava-Kovats, Søren Rosendahl, Matthias C Rillig, Ylva Lekberg, Holger Kreft, Thorunn Helgason, Ove Eriksson, John Davison, Francesco de Bello, Tancredi Caruso, Martin Zobel
The availability of global microbial diversity data, collected using standardized metabarcoding techniques, makes microorganisms promising models for investigating the role of regional and local factors in driving biodiversity. Here we modelled the global diversity of symbiotic arbuscular mycorrhizal (AM) fungi using currently available data on AM fungal molecular diversity (small subunit (SSU) ribosomal RNA (rRNA) gene sequences) in field samples. To differentiate between regional and local effects, we estimated species pools (sets of potentially suitable taxa) for each site, which are expected to reflect regional processes...
July 19, 2017: New Phytologist
https://www.readbyqxmd.com/read/28721858/detection-of-african-swine-fever-virus-in-the-tissues-of-asymptomatic-pigs-in-smallholder-farming-systems-along-the-kenya-uganda-border-implications-for-transmission-in-endemic-areas-and-asf-surveillance-in-east-africa
#4
Edward Okoth Abworo, Cynthia Onzere, Joshua Oluoch Amimo, Victor Riitho, Waithaka Mwangi, Jocelyn Davies, Sandra Blome, Richard Peter Bishop
The persistence of African swine fever virus (ASFV) in endemic areas, with small-scale but regular outbreaks in domestic pigs, is not well understood. ASFV has not been detected using conventional diagnosis in these pigs or adjacent populations of resistant African wild pigs, that could act as potential carriers during the outbreaks. However, such data are crucial for the design of evidence-based control strategies. We conducted cross-sectional (1107 pigs) and longitudinal (100 pigs) monitoring of ASFV prevalence in local pigs in Kenya and Uganda...
July 18, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28720892/dual-band-wide-angle-metamaterial-perfect-absorber-based-on-the-combination-of-localized-surface-plasmon-resonance-and-helmholtz-resonance
#5
Changlei Zhang, Cheng Huang, Mingbo Pu, Jiakun Song, Zeyu Zhao, Xiaoyu Wu, Xiangang Luo
In this article, a dual-band wide-angle metamaterial perfect absorber is proposed to achieve absorption at the wavelength where laser radar operates. It is composed of gold ring array and a Helmholtz resonance cavity spaced by a Si dielectric layer. Numerical simulation results reveal that the designed absorber displays two absorption peaks at the target wavelength of 10.6 μm and 1.064 μm with the large frequency ratio and near-unity absorptivity under the normal incidence. The wide-angle absorbing property and the polarization-insensitive feature are also demonstrated...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28717801/mimicking-arterial-thrombosis-in-a-3d-printed-microfluidic-in-vitro-vascular-model-based-on-computed-tomography-angiography-data
#6
Pedro F Costa, Hugo J Albers, John E A Linssen, Heleen H T Middelkamp, Linda van der Hout, Robert Passier, Albert van den Berg, Jos Malda, Andries D van der Meer
Arterial thrombosis is the main instigating factor of heart attacks and strokes, which result in over 14 million deaths worldwide every year. The mechanism of thrombosis involves factors from the blood and the vessel wall, and it also relies strongly on 3D vessel geometry and local blood flow patterns. Microfluidic chip-based vascular models allow controlled in vitro studies of the interaction between vessel wall and blood in thrombosis, but until now, they could not fully recapitulate the 3D geometry and blood flow patterns of real-life healthy or diseased arteries...
July 18, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28716962/gamma-oscillations-in-the-rat-ventral-striatum-originate-in-the-piriform-cortex
#7
James E Carmichael, Jimmie M Gmaz, Matthijs A A van der Meer
Local field potentials (LFPs) recorded from the human and rodent ventral striatum (vStr) exhibit prominent, behaviorally relevant gamma-band oscillations. These oscillations are related to local spiking activity and transiently synchronize with anatomically related areas, suggesting a possible role in organizing vStr activity. However, the origin of vStr gamma is unknown. We recorded vStr gamma oscillations across a 1.4mm(2) grid spanned by 64 recording electrodes as male rats rested and foraged for rewards, revealing a highly consistent power gradient originating in the adjacent piriform cortex...
July 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28715701/synthetic-biological-approaches-to-optogenetically-control-cell-signaling
#8
REVIEW
Katja Kolar, Wilfried Weber
Precise spatial and temporal control of cellular processes is in life sciences a highly sought-after capability. In the recent years, this goal has become progressively achievable through the field of optogenetics, which utilizes light as a non-invasive means to control genetically encoded light-responsive proteins. The latest optogenetic systems, such as those for control of subcellular localization or cellular decision-making and tissue morphogenesis provide us with insights to gain a deeper understanding of the cellular inner workings...
July 14, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28714538/the-symphony-of-smell-a-role-for-electrical-synapses
#9
Graeme Lowe
Rhythmic electrical activities are ubiquitous in the brain and inextricably tied to neural circuit operations. Macroscopic oscillations in extracellular voltage - the local field potential (LFP) - are commonly observed and span a wide frequency spectrum (∼1.5 - 100 Hz). This article is protected by copyright. All rights reserved.
July 17, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28713885/synergistic-effect-of-au-ag-nano-alloying-intense-seira-and-enhanced-catalysis
#10
Manoj Verma, M Boazbou Newmai, P Senthil Kumar
The well-known AuAg nanohybrid system was effectively synthesized, utilizing polyvinyl pyrrolidone (PVP) as a multiple metal precursor reducing agent (based solely on their reduction potentials), thereby drastically decreasing their activation energy of diffusion and readily facilitating the homogenous alloy nanoparticle formation, duly confirmed by Vegard's law. Furthermore, the crucial parameters in determining the local electric field enhancement in the vicinity of the alloy nanoparticles such as the quality factor Q, dephasing time, T2 and the homogenous line width Γ were also evaluated in a systematic manner, in correlation with their unique visible optical absorption spectra...
July 17, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28713594/small-molecule-big-prospects-microrna-in-pregnancy-and-its-complications
#11
REVIEW
Meng Cai, Gopi K Kolluru, Asif Ahmed
MicroRNAs are small, noncoding RNA molecules that regulate target gene expression in the posttranscriptional level. Unlike siRNA, microRNAs are "fine-tuners" rather than "switches" in the regulation of gene expression; thus they play key roles in maintaining tissue homeostasis. The aberrant microRNA expression is implicated in the disease process. To date, numerous studies have demonstrated the regulatory roles of microRNAs in various pathophysiological conditions. In contrast, the study of microRNA in pregnancy and its associated complications, such as preeclampsia (PE), fetal growth restriction (FGR), and preterm labor, is a young field...
2017: Journal of Pregnancy
https://www.readbyqxmd.com/read/28712991/low-beta-cortico-pallidal-coherence-decreases-during-movement-and-correlates-with-overall-reaction-time
#12
Bernadette C M van Wijk, Wolf-Julian Neumann, Gerd-Helge Schneider, Tilmann H Sander, Vladimir Litvak, Andrea A Kühn
Beta band oscillations (13-30 Hz) are a hallmark of cortical and subcortical structures that are part of the motor system. In addition to local population activity, oscillations also provide a means for synchronization of activity between regions. Here we examined the role of beta band coherence between the internal globus pallidus (GPi) and (motor) cortex during a simple reaction time task performed by nine patients with idiopathic dystonia. We recorded local field potentials from deep brain stimulation (DBS) electrodes implanted in bilateral GPi in combination with simultaneous whole-head magneto-encephalography (MEG)...
July 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28711622/prolonged-low-level-noise-induced-plasticity-in-the-peripheral-and-central-auditory-system-of-rats
#13
Adam M Sheppard, Guang-Di Chen, Senthilvelan Manohar, Dalian Ding, Bo-Hua Hu, Wei Sun, Jiwie Zhao, Richard Salvi
Prolonged low-level noise exposure alters loudness perception in humans, presumably by decreasing the gain of the central auditory system. Here we test the central gain hypothesis by measuring the acute and chronic physiologic changes at the level of the cochlea and inferior colliculus (IC) after a 75 dB SPL, 10-20 kHz noise exposure for 5 weeks. The compound action potential (CAP) and summating potential (SP) were used to assess the functional status of the cochlea and 16 channel electrodes were used to measure the local field potentials (LFP) and multi-unit spike discharge rates (SDR) from the IC immediately after and one-week post-exposure...
July 12, 2017: Neuroscience
https://www.readbyqxmd.com/read/28711186/megavoltage-2d-topographic-imaging-an-attractive-alternative-to-megavoltage-ct-for-the-localization-of-breast-cancer-patients-treated-with-tomodirect
#14
Philippe Meyer, Fabien Le Pennec, Susanta K Hui, Nicolas Dehaynin, Delphine Jarnet, Matthieu Gantier, Claudine Niederst, Christophe Mazzara, Etienne Baudrier, Vincent Noblet
PURPOSE: To show the usefulness of topographic 2D megavoltage images (MV2D) for the localization of breast cancer patients treated with TomoDirect (TD), a radiotherapy treatment technique with fixed-angle beams performed on a TomoTherapy system. METHODS: A method was developed to quickly localize breast cancer patients treated with TD by registering the MV2D images produced before a TD treatment with reference images reconstructed from a kilovoltage CT simulation scanner and by using the projection of the beam-eye-view TD treatment field...
July 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28708928/the-milan-system-for-reporting-salivary-gland-cytopathology-analysis-and-suggestions-of-initial-survey
#15
Esther Diana Rossi, William C Faquin, Zubair Baloch, Güliz A Barkan, Maria Pia Foschini, Marc Pusztaszeri, Philippe Vielh, Daniel F I Kurtycz
BACKGROUND: An international panel of experts in the field of salivary gland cytology (SGC), supported by the American Society of Cytopathology (ASC) and the International Academy of Cytology, conducted a survey to seek evidence and practice patterns regarding SGC. Results were used to provide focus for the proposed Milan System for Reporting Salivary Gland Cytopathology. METHODS: The study group, formed during the 2015 European Congress of Cytology held in Milan, Italy, generated a survey that included 49 specific questions related to the taxonomies, practices, and diagnostic entities of salivary cytology...
July 14, 2017: Cancer
https://www.readbyqxmd.com/read/28704342/a-novel-compact-small-field-of-view-hybrid-gamma-camera-first-clinical-results
#16
Aik H Ng, Patricia E Blackshaw, Mohammed S Alqahtani, Layal K Jambi, Sarah L Bugby, John E Lees, Alan C Perkins
INTRODUCTION: Hybrid imaging has proven to be a major innovation in nuclear medicine, allowing the fusion of functional information with anatomical detail. In the past, the use of hybrid imaging such as PET-CT, PET-MRI and SPECT-CT has been of great clinical benefit; however, these scanners are relatively large and bulky. We have developed and investigated the clinical application of a compact small field of view hybrid gamma camera (HGC) that is suitable for small-organ imaging at the patient bedside...
July 12, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28704145/adult-zebrafish-danio-rerio-an-alternative-behavioral-model-of-formalin-induced-nociception
#17
Francisco Ernani Alves Magalhães, Caio Átila Prata Bezerra de Sousa, Sacha Aubrey Alves Rodrigues Santos, Renata Barbosa Menezes, Francisco Lucas Alves Batista, Ângela Oliveira Abreu, Messias Vital de Oliveira, Luiz Francisco Wemmenson Gonçalves Moura, Ramon da Silva Raposo, Adriana Rolim Campos
The zebrafish (Danio rerio) has been proposed as a low-cost and simple alternative to the use of higher vertebrates in laboratory research on novel compounds with antinociceptive potential. In this study, we tested adult zebrafish (Danio rerio) as an alternative behavioral model of formalin-induced nociception. We evaluated the nociceptive effect of 0.1% formalin (3 or 5 μL; intramuscularly [i.m.]), applied into the tail or lips, on locomotor activity, using as parameter the number of times the fish crossed the lines between the quadrants of a glass Petri dish during the neurogenic stage (0-5 min) and the inflammatory stage (15-30 min)...
July 13, 2017: Zebrafish
https://www.readbyqxmd.com/read/28702186/the-biological-and-clinical-basis-for-the-use-of-adipose-derived-stem-cells-in-the-field-of-wound-healing
#18
REVIEW
Nicolò Bertozzi, Francesco Simonacci, Michele Pio Grieco, Eugenio Grignaffini, Edoardo Raposio
Worldwide, hard-to-heal lower limb wounds are estimated to affect 1.5-3% of the adult population with a treatment-related annual cost of $10 billion. Thus, chronic skin ulcers of the lower limb are a matter of economic and public concern. Over the years, multiple medical and surgical approaches have been proposed but they are still inadequate, and no effective therapy yet exists. Regenerative medicine and stem cell-based therapies hold great promise for wound healing. Recently, many plastic surgeons have studied the potential clinical application of adipose-derived stem cells (ASCs), which are a readily available adult stem cell population that can undergo multilineage differentiation and secrete growth factors that can enhance wound-healing processes by promoting angiogenesis, and hence increase local blood supply...
August 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28698678/prototype-of-a-bistable-polariton-field-effect-transistor-switch
#19
H Suchomel, S Brodbeck, T C H Liew, M Amthor, M Klaas, S Klembt, M Kamp, S Höfling, C Schneider
Microcavity exciton polaritons are promising candidates to build a new generation of highly nonlinear and integrated optoelectronic devices. Such devices range from novel coherent light emitters to reconfigurable potential landscapes for electro-optical polariton-lattice based quantum simulators as well as building blocks of optical logic architectures. Especially for the latter, the strongly interacting nature of the light-matter hybrid particles has been used to facilitate fast and efficient switching of light by light, something which is very hard to achieve with weakly interacting photons...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28697284/community-driven-hypothesis-testing-a-solution-for-the-tragedy-of-the-anticommons
#20
José Manuel Palma-Oliveira, Benjamin D Trump, Matthew D Wood, Igor Linkov
Shared ownership of property and resources is a longstanding challenge throughout history that has been amplifying with the increasing development of industrial and postindustrial societies. Where governments, project planners, and commercial developers seek to develop new infrastructure, industrial projects, and various other land-and resource-intensive tasks, veto power shared by various local stakeholders can complicate or halt progress. Risk communication has been used as an attempt to address stakeholder concerns in these contexts, but has demonstrated shortcomings...
July 11, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
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