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https://www.readbyqxmd.com/read/28822911/maullinia-braseltonii-sp-nov-rhizaria-phytomyxea-phagomyxida-a-cyst-forming-parasite-of-the-bull-kelp-durvillaea-spp-stramenopila-phaeophyceae-fucales
#1
Pedro Murúa, Franz Goecke, Renato Westermeier, Pieter van West, Frithjof C Küpper, Sigrid Neuhauser
Phytomyxea are obligate endoparasites of angiosperm plants and Stramenopiles characterised by a complex life cycle. Here Maullinia braseltonii sp. nov., an obligate parasite infecting the bull kelp Durvillaea (Phaeophyceae, Fucales) from the South-Eastern Pacific (Central Chile and Chiloe Island) and South-Western Atlantic (Falkland Islands, UK) is described. M. braseltonii causes distinct hypertrophies (galls) on the host thalli making it easily identifiable in the field. Sequence comparisons based on the partial 18S and the partial 18S-5...
July 13, 2017: Protist
https://www.readbyqxmd.com/read/28822141/applicability-of-quantitative-optical-imaging-techniques-for-intraoperative-perfusion-diagnostics-a-comparison-of-laser-speckle-contrast-imaging-sidestream-dark-field-microscopy-and-optical-coherence-tomography
#2
Sanne M Jansen, Daniel M de Bruin, Dirk J Faber, Iwan J G G Dobbe, Erik Heeg, Dan M J Milstein, Simon D Strackee, Ton G van Leeuwen
Patient morbidity and mortality due to hemodynamic complications are a major problem in surgery. Optical techniques can image blood flow in real-time and high-resolution, thereby enabling perfusion monitoring intraoperatively. We tested the feasibility and validity of laser speckle contrast imaging (LSCI), optical coherence tomography (OCT), and sidestream dark-field microscopy (SDF) for perfusion diagnostics in a phantom model using whole blood. Microvessels with diameters of 50, 100, and 400  μm were constructed in a scattering phantom...
August 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28821846/the-effects-of-long-term-abacus-training-on-topological-properties-of-brain-functional-networks
#3
Jian Weng, Ye Xie, Chunjie Wang, Feiyan Chen
Previous studies in the field of abacus-based mental calculation (AMC) training have shown that this training has the potential to enhance a wide variety of cognitive abilities. It can also generate specific changes in brain structure and function. However, there is lack of studies investigating the impact of AMC training on the characteristics of brain networks. In this study, utilizing graph-based network analysis, we compared topological properties of brain functional networks between an AMC group and a matched control group...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821676/brief-novel-visual-experience-fundamentally-changes-synaptic-plasticity-in-the-mouse-visual-cortex
#4
Shuo Li, Laijian Wang, Xiaoxiu Tie, Kazuhiro Sohya, Xian Lin, Alfredo Kirkwood, Bin Jiang
Long-term potentiation (LTP) has been known to be a mechanism by which experience modifies synaptic responses in the neocortex. Visual deprivation in the form of dark exposure or dark rearing from birth enhances NMDAR-dependent LTP in layer 2/3 of visual cortex, a process often termed metaplasticity, which may involve changes in NMDAR subunit composition and function. However, the effects of re-exposure to light after dark rearing from birth on LTP induction have not been explored. Here, we showed that the light exposure after dark rearing revealed a novel NMDAR independent form of LTP in the layer 2/3 pyramidal cells in visual cortex of mice of both sexes which is dependent on mGluR5 activation and is associated with intracellular Ca2+ rise, CaMKII activity, PKC activity and intact protein synthesis...
August 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28821662/visual-receptive-field-heterogeneity-and-functional-connectivity-of-adjacent-neurons-in-primate-fronto-parietal-association-cortices
#5
Pooja Viswanathan, Andreas Nieder
The basic organization principles of the primary visual cortex (V1) are commonly assumed to also hold in the association cortex such that neurons within a cortical column share functional connectivity patterns and represent the same region of the visual field. We mapped the visual receptive fields (RFs) of neurons recorded at the same electrode in the ventral intraparietal area (VIP) and the lateral prefrontal cortex (PFC) of rhesus monkeys. We report that the spatial characteristics of visual receptive fields between adjacent neurons differed considerably, with increasing heterogeneity from VIP to PFC...
August 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28821647/plasticity-beyond-v1-reinforcement-of-motion-perception-upon-binocular-central-retinal-lesions-in-adulthood
#6
Kalina Burnat, Tjing-Tjing Hu, Małgorzata Kossut, Ulf T Eysel, Lutgarde Arckens
Induction of a central retinal lesion in both eyes of adult mammals is a model for macular degeneration and leads to retinotopic map reorganization in the primary visual cortex (V1). Here we characterized the spatio-temporal dynamics of molecular activity levels in the central and peripheral representation of five higher order visual areas, V2/18, V3/19, V4/21a,V5/PMLS, area 7, and V1/17, in adult cats with central 10° retinal lesions (both sexes), by means of real-time PCR for the neuronal activity reporter gene zif268...
August 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28821276/inflammatory-demyelination-alters-subcortical-visual-circuits
#7
Sheila Espírito Santo Araújo, Henrique Rocha Mendonça, Natalie A Wheeler, Paula Campello-Costa, Kimberle M Jacobs, Flávia C A Gomes, Michael A Fox, Babette Fuss
BACKGROUND: Multiple sclerosis (MS) is an inflammatory demyelinating disease classically associated with axonal damage and loss; more recently, however, synaptic changes have been recognized as additional contributing factors. An anatomical area commonly affected in MS is the visual pathway; yet, changes other than those associated with inflammatory demyelination of the optic nerve, i.e., optic neuritis, have not been described in detail. METHODS: Adult mice were subjected to a diet containing cuprizone to mimic certain aspects of inflammatory demyelination as seen in MS...
August 18, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28820764/severe-case-of-renal-coloboma-syndrome-in-long-term-follow-up
#8
Lise Sels, Werner Dirven, Koenraad Devriendt, Anita Leys
PURPOSE: To characterize the ocular features of a severe case of renal coloboma syndrome in a long-term follow-up. METHODS: Observational case report over a period of 45 years. Examination under anesthesia at the age of 3 months, repeated ophthalmologic examination (age 7, 14, 25, 45 years), fluorescein and indocyanine green angiography, electroretinography, ocular ultrasound, optical coherence tomography, computed tomography scan orbits, and magnetic resonance imaging of the brain...
August 17, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28820625/multimodal-image-analysis-of-the-retina-in-hunter-syndrome-mucopolysaccharidosis-type-ii-case-report
#9
Isadora Darriba Macedo Salvucci, Simone Finzi, Maria Kiyoko Oyamada, Chong Ae Kim, Sérgio Luis Gianotti Pimentel
INTRODUCTION: We report a case of retinal and posterior ocular findings in a 33-year-old man diagnosed with Hunter syndrome (Mucopolysaccharidosis type II) in a multimodal imaging way. CASE PRESENTATION: Our patient was complaining of blurred night vision for the past 3 years. He had not received any systemic treatment for Hunter syndrome. Vision acuity was 20/20 in both eyes and corneas were clear. Fundus examination revealed bilateral crowded and hyperemic optic nerve heads (elevated in the ocular ultrasound) and areas of subretinal hypopigmentation...
August 18, 2017: Ophthalmic Genetics
https://www.readbyqxmd.com/read/28819609/combined-fluoroscopic-and-arthroscopic-detection-and-removal-of-a-foreign-body-lost-during-elective-shoulder-arthroscopy-a-case-report
#10
Uli Schmiddem, N Hawi, E M Suero, R Meller
INTRODUCTION: We report a case of a lost metal platelet from a radiofrequency ablation probe (VAPR VUE Radiofrequency System, Cool Pulse 90, DePuy, Synthes, Switzerland) in the shoulder joint during elective arthroscopic cuff repair. To the best of our knowledge, this kind of an incident during elective arthroscopy has not been described in the literature so far. In addition, we present an algorithm on how to deal with such an incident. CASE REPORT: A 69-year-old woman underwent an arthroscopic subacromial decompression and rotator cuff repair for a torn supraspinatus tendon...
March 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28818310/fracture-analysis-of-tube-boiler-for-physical-explosion-accident
#11
Eui Soo Kim
Material and failure analysis techniques are key tools for determining causation in case of explosive and bursting accident result from material and process defect of product in the field of forensic science. The boiler rupture generated by defect of the welding division, corrosion, overheating and degradation of the material have devastating power. If weak division of boiler burner is fractured by internal pressure, saturated vapor and water is vaporized suddenly. At that time, volume of the saturated vapor and water increases up to thousands of volume...
August 3, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28816865/liquid-crystal-spatial-light-modulators-for-simulating-zonal-multifocal-lenses
#12
Yiyu Li, Arthur Bradley, Renfeng Xu, Pete S Kollbaum
SIGNIFICANCE: To maximize efficiency of the normally lengthy and costly multizone lens design and testing process, it is advantageous to evaluate the potential efficacy of a design as thoroughly as possible prior to lens fabrication and on-eye testing. The current work describes an ex vivo approach of optical design testing. PURPOSE: The aim of this study was to describe a system capable of examining the optical characteristics of multizone bifocal and multifocal optics by subaperture stitching using liquid crystal technologies...
August 14, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28816820/factors-that-influence-of-trabectome-surgery-for-glaucoma-patients
#13
Naoki Tojo, Shinya Abe, Atsushi Hayashi
BACKGROUND: The aim of this study was to investigate the factors that influence the outcome of trabectome surgery. METHODS: This was a retrospective nonrandomized study. Seventy-eight glaucoma patients (86 eyes) who underwent trabectome surgeries and were followed up for more than 12 months were included. We classified the subtypes of glaucoma as: primary open-angle glaucoma (23 eyes), pseudo-exfoliation glaucoma (58 eyes), and secondary glaucoma (5 eyes). Forty-seven eyes underwent cataract and trabectome surgeries simultaneously, and 39 underwent only trabectome surgery...
August 14, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28816656/tracking-by-detection-of-3d-human-shapes-from-surfaces-to-volumes
#14
Chun-Hao Huang, Benjamin Allain, Edmond Boyer, Jean-Sebastien Franco, Federico Tombari, Nassir Navab, Slobodan Ilic
3D Human shape tracking consists in fitting a template model to temporal sequences of visual observations. It usually comprises an association step, that finds correspondences between the model and the input data, and a deformation step, that fits the model to the observations given correspondences. Most current approaches follow the Iterative-Closest-Point (ICP) paradigm, where the association step is carried out by searching for the nearest neighbors. It fails when large deformations occur and errors in the association tend to propagate over time...
August 15, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28815431/central-peripheral-differences-in-audiovisual-and-visuotactile-event-perception
#15
Yi-Chuan Chen, Daphne Maurer, Terri L Lewis, Charles Spence, David I Shore
We examined audiovisual and visuotactile integration in the central and peripheral visual field using visual fission and fusion illusions induced by sounds or taps. The fission illusion occurs when a single flash is perceived as two flashes if paired with two beeps or taps; the fusion illusion, by contrast, occurs when two flashes are perceived as a single flash if the flashes are paired with a single beep or tap. Beeps and taps induced similar patterns of illusions: the fission illusion was larger in the periphery than in the center, whereas the fusion illusion was larger in the center than in the periphery...
August 16, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28815393/pattern-noise-pano-a-new-automated-functional-glaucoma-test
#16
Sylvain El-Khoury, Thomas Hannen, Diana Carmen Dragnea, Faustin Ngounou, Paul-Rolf Preußner
PURPOSE: To present a newly developed visual field device (pattern noise: PANO) designed to be sensitive to glaucoma defects, cost-effective, material-practical and easy to repair and therefore particularly suited for low-income countries, where glaucoma can be highly prevalent (e.g. sub-Saharan Africa). METHODS: This is primarily a descriptive paper, but it also includes a prospective matched case-control pilot study. Hardware, stimulus, target configuration, testing strategy and result sheet are described...
August 16, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28815346/unilateral-cancer-associated-retinopathy-diagnosis-serology-and-treatment
#17
Dimitri Roels, Shinji Ueno, Cornelia D Talianu, Dafina Draganova, Mineo Kondo, Bart P Leroy
PURPOSE: To report a case of unilateral cancer-associated retinopathy (CAR) with clinical, serological and electroretinogram (ERG) normalization after aggressive cancer treatment combined with steroids and rituximab. METHODS: Work-up included extensive clinical and electrophysiological testing. Also, serological work-up for antiretinal antibodies and oncological screening was organized. RESULTS: A 45-year-old female presented with progressive photopsias, photophobia and relative central scotoma in the right eye since 6 weeks prior...
August 16, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28815087/ocular-and-systemic-risk-factors-of-different-morphologies-of-scotoma-in-patients-with-normal-tension-glaucoma
#18
Ewa Kosior-Jarecka, Dominika Wróbel-Dudzińska, Urszula Łukasik, Tomasz Żarnowski
THE AIM: The aim of this study was to assess general and ocular profiles of patients with single-localisation changes in visual field. MATERIAL AND METHODS: The study group consisted of 215 Caucasian patients with normal-tension glaucoma with scotoma on single localisation or with preperimetric glaucoma. During regular follow-up visits, ophthalmic examination was carried out and medical history was recorded. The results of the visual field were allocated as paracentral scotomas, arcuate scotomas, peripheral defects, or hemispheric defects...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28814649/wnt-ligand-presentation-and-reception-from-the-stem-cell-niche-to-tissue-engineering
#19
REVIEW
Kate M Mills, James L A Szczerkowski, Shukry J Habib
Stem cells reside in niches where spatially restricted signals maintain a delicate balance between stem cell self-renewal and differentiation. Wnt family proteins are particularly suited for this role as they are modified by lipids, which constrain and spatially regulate their signalling range. In recent years, Wnt/β-catenin signalling has been shown to be essential for the self-renewal of a variety of mammalian stem cells. In this review, we discuss Wnt-responsive stem cells in their niche, and mechanisms by which Wnt ligands are presented to responsive cells...
August 2017: Open Biology
https://www.readbyqxmd.com/read/28814316/evaluation-of-sarolaner-and-spinosad-oral-treatments-to-eliminate-fleas-reduce-dermatologic-lesions-and-minimize-pruritus-in-naturally-infested-dogs-in-west-central-florida-usa
#20
Michael W Dryden, Michael S Canfield, Emily Niedfeldt, Amanda Kinnon, Kimberly Kalosy, Amber Smith, Kaitlin M Foley, Vicki Smith, Todd S Bress, Nicole Smith, Mike Endrizzi, Joyce Login
BACKGROUND: An in-home investigation of naturally flea infested dogs was conducted in West Central Florida, USA to evaluate and compare the effectiveness of two different oral flea adulticides to control flea infestations, minimize dermatologic lesions and reduce pruritus over an 8-week period. METHODS: Twenty-nine dogs living in 19 homes and another 26 dogs residing in 16 different homes were orally administered either a sarolaner or spinosad chewable, respectively on day 0 and once between days 28-30...
August 17, 2017: Parasites & Vectors
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