keyword
MENU ▼
Read by QxMD icon Read
search

visual fields

keyword
https://www.readbyqxmd.com/read/28092030/proteomic-clustering-analysis-of-sh2-domain-datasets
#1
Karl Jablonowski
Proteomic clustering analysis provides a means of identifying relationships and visualizing those relationships in an extremely complex field of study with many interacting parts. With recent high-throughput studies of Src Homology 2 (SH2) domains, many and varied datasets are being amassed. A strategy for analyzing patterns between these large datasets is required to transform the information into knowledge. The methods for creating neighbor-joining phylogenetic trees, pairs scatter plots, and two-dimensional hierarchical clustering heatmaps are just a few of the diverse methods available to a proteomic researcher...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28091782/adaptation-perceptual-learning-and-plasticity-of-brain-functions
#2
REVIEW
Jonathan C Horton, Manfred Fahle, Theo Mulder, Susanne Trauzettel-Klosinski
The capacity for functional restitution after brain damage is quite different in the sensory and motor systems. This series of presentations highlights the potential for adaptation, plasticity, and perceptual learning from an interdisciplinary perspective. The chances for restitution in the primary visual cortex are limited. Some patterns of visual field loss and recovery after stroke are common, whereas others are impossible, which can be explained by the arrangement and plasticity of the cortical map. On the other hand, compensatory mechanisms are effective, can occur spontaneously, and can be enhanced by training...
January 14, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28091700/computed-tomography-localization-of-the-appendix-in-the-pediatric-population-relative-to-the-lumbar-spine
#3
John Davis, Albert T Roh, Matthew B Petterson, Tammy R Kopelman, Samantha L Matz, Daniel G Gridley, Mary J Connell
BACKGROUND: Computed tomography (CT) is commonly used to evaluate suspected acute appendicitis. Although very effective, CT uses ionizing radiation, exposing patients to an increased risk of cancer. OBJECTIVE: This study assessed the potential for decreasing the field of view of the CT (and therefore the dose to the patient) in the evaluation of suspected acute appendicitis in children. MATERIALS AND METHODS: This study was a retrospective review of prospectively collected data from 212 consecutive patients who underwent CT for suspected acute appendicitis...
January 14, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28091597/direct-visualization-of-hydrogen-absorption-dynamics-in-individual-palladium-nanoparticles
#4
Tarun C Narayan, Fariah Hayee, Andrea Baldi, Ai Leen Koh, Robert Sinclair, Jennifer A Dionne
Many energy storage materials undergo large volume changes during charging and discharging. The resulting stresses often lead to defect formation in the bulk, but less so in nanosized systems. Here, we capture in real time the mechanism of one such transformation-the hydrogenation of single-crystalline palladium nanocubes from 15 to 80 nm-to better understand the reason for this durability. First, using environmental scanning transmission electron microscopy, we monitor the hydrogen absorption process in real time with 3 nm resolution...
January 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28090611/performance-of-nano-assembly-logic-gates-with-a-dna-multi-hairpin-motif
#5
Lulu Zhang, Annie M Bluhm, Kuan-Jen Chen, Nicholas E Larkey, Sean M Burrows
DNA nano-assemblies have far-reaching implications for molecular computers. Boolean logic gates made from DNA respond to specific combinations of chemical or molecular inputs. In complex samples an assortment of other chemicals and molecules may interfere with the gate's recognition and response mechanisms. For logic gates to accept an increasing number of inputs, while maintaining selectivity, their design must only respond when specific input combinations are available simultaneously. Here we present proof-of-principle for a fluorescent-based nano-assembly logic gate for three inputs...
January 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/28089903/advances-in-mr-angiography-with-7t-mri-from-microvascular-imaging-to-functional-angiography
#6
Chan-A Park, Chang-Ki Kang, Young-Bo Kim, Zang-Hee Cho
Over the past few decades, vascular flow-dependent imaging techniques have proven to be effective for the visualization of large vessel diseases. However, these approaches are unlikely to be efficacious for small vessels because the affected small vessels cannot always be visualized directly, owing to a lack of detection sensitivity. Recently, many researchers have introduced state-of-the-art imaging techniques to visualize cerebral microvessels using ultra-high-field (UHF) magnetic resonance angiography (MRA)...
January 12, 2017: NeuroImage
https://www.readbyqxmd.com/read/28089870/large-dense-core-vesicle-exocytosis-from-mouse-dorsal-root-ganglion-neurons-is-regulated-by-neuropeptide-y
#7
Anneka Bost, Ali H Shaib, Yvonne Schwarz, Barbara A Niemeyer, Ute Becherer
Peptidergic dorsal root ganglion (DRG) neurons transmit sensory and nociceptive information from the periphery to the central nervous system. Their synaptic activity is profoundly affected by neuromodulatory peptides stored and released from large dense-core vesicles (LDCVs). However, the mechanism of peptide secretion from DRG neurons is poorly understood. Using total internal reflection fluorescence microscopy (TIRFM), we visualized individual LDCVs loaded with fluorescent neuropeptide Y (NPY) and analyzed their stimulation-dependent release...
January 12, 2017: Neuroscience
https://www.readbyqxmd.com/read/28089680/peripheral-retinal-changes-associated-with%C3%A2-age-related-macular-degeneration-in%C3%A2-the-age-related-eye-disease-study-2-age-related-eye-disease-study-2-report-number-12-by-the%C3%A2-age-related-eye-disease-study-2-optos-peripheral-retina-opera-study-research-group
#8
Amitha Domalpally, Traci E Clemons, Ronald P Danis, SriniVas R Sadda, Catherine A Cukras, Cynthia A Toth, Thomas R Friberg, Emily Y Chew
PURPOSE: To compare rates of peripheral retinal changes in Age-Related Eye Disease Study 2 (AREDS2) participants with at least intermediate age-related macular degeneration (AMD) with control subjects without intermediate age-related changes (large drusen). DESIGN: Cross-sectional evaluation of clinic-based patients enrolled in AREDS2 and a prospective study. PARTICIPANTS: Participants from prospective studies. METHODS: The 200° pseudocolor and fundus autofluorescence (FAF) images were captured on the Optos 200 Tx Ultrawide-field device (Optos, Dunfermline, Scotland) by centering on the fovea and then steering superiorly and inferiorly...
January 12, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28088912/melatonin-as-a-therapeutic-resource-for-inflammatory-visual-diseases
#9
Marcos L Aranda, María Florencia González Fleitas, Hernán Dieguez, Agustina Iaquinandi, Pablo H Sande, Damián Dorfman, Ruth E Rosenstein
BACKGROUND: Uveitis and optic neuritis are prevalent ocular inflammatory diseases, and highly damaging ocular conditions. Both diseases are currently treated with corticosteroids, but they do not have adequate efficacy and are often associated with severe side effects. Thus, uveitis and optic neuritis remain a challenging field to ophthalmologists and a significant public health concern. OBJECTIVE: This review summarizes findings showing the benefits of a treatment with melatonin in experimental models of these inflammatory ocular diseases...
January 13, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/28088666/vocal-emotion-decoding-in-the-subthalamic-nucleus-an-intracranial-erp-study-in-parkinson-s-disease
#10
Julie Péron, Olivier Renaud, Claire Haegelen, Lucas Tamarit, Valérie Milesi, Jean-François Houvenaghel, Thibaut Dondaine, Marc Vérin, Paul Sauleau, Didier Grandjean
Using intracranial local field potential (LFP) recordings in patients with Parkinson's disease (PD) undergoing deep brain stimulation (DBS), we explored the electrophysiological activity of the subthalamic nucleus (STN) in response to emotional stimuli in the auditory modality. Previous studies focused on the influence of visual stimuli. To this end, we recorded LFPs within the STN in response to angry, happy, and neutral prosodies in 13 patients with PD who had just undergone implantation of DBS electrodes...
January 12, 2017: Brain and Language
https://www.readbyqxmd.com/read/28088510/association-between-nocturnal-blood-pressure-dips-and-optic-disc-hemorrhage-in-patients-with-normal-tension-glaucoma
#11
Junki Kwon, Jinyoung Lee, Jaewan Choi, Dawoon Jeong, Michael S Kook
PURPOSE: To investigate the effect of nocturnal blood pressure (BP) dips on the occurrence of optic disc hemorrhage (ODH) in normal-tension glaucoma (NTG) patients and determine whether ODH is associated with greater likelihood of visual field progression (VFP). DESIGN: Prospective case-control study. METHODS: This study enrolled 698 eyes of 349 consecutive NTG patients who were ≥40 years old, underwent 24 hour intraocular pressure and ambulatory BP monitoring in the habitual position, were examined for ODH every 4-6 months with optic disc photography, and had ≥ five reliable VF tests with minimum follow-up of 3 years...
January 11, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28088508/relationship-between-central-retinal-vessel-trunk-location-and-visual-field-loss-in-glaucoma
#12
Mengyu Wang, Hui Wang, Louis R Pasquale, Neda Baniasadi, Lucy Q Shen, Peter J Bex, Tobias Elze
PURPOSE: To study the relationship between horizontal central retinal vessel trunk location (CRVTL) on glaucomatous optic discs and sector-specific visual field (VF) loss. DESIGN: Retrospective, cross-sectional study. METHODS: CRVTL of 421 eyes from 421 patients was manually tracked on the horizontal optic disc axis on fundus images. Focal circumpapillary retinal nerve fiber layer thickness (cpRNFLT) measurements were extracted from optical coherence tomography (OCT)...
January 11, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28088320/quantifying-lipid-changes-in-various-membrane-compartments-using-lipid-binding-protein-domains
#13
REVIEW
Péter Várnai, Gergő Gulyás, Dániel J Tóth, Mira Sohn, Nivedita Sengupta, Tamas Balla
One of the largest challenges in cell biology is to map the lipid composition of the membranes of various organelles and define the exact location of processes that control the synthesis and distribution of lipids between cellular compartments. The critical role of phosphoinositides, low-abundant lipids with rapid metabolism and exceptional regulatory importance in the control of almost all aspects of cellular functions created the need for tools to visualize their localizations and dynamics at the single cell level...
December 31, 2016: Cell Calcium
https://www.readbyqxmd.com/read/28088116/upconversion-color-tuning-in-ce-3-doped-liyf4-yb-3-ho-3-liyf4-nanoparticles-towards-ratiometric-fluorescence-detection-of-chromium-iii
#14
Shijiang Liu, Yangjie Li, Cheng Zhang, Liang Yang, Tingting Zhao, Ruilong Zhang, Changlong Jiang
Ratiometric fluorescence sensor exhibits advantages of sensitive response, high anti-interference ability and naked eye visualization owing to multiple independent emission peaks utilized for results analysis. To achieve such multi-emission probe, the traditional methods have involved simple mixing of two emitters or tedious synthesis processes of hybrid material. However, these probes often have problems of inconstant emission strength ratio, low light-stability, and complicated synthetic process, which limit their applications in practical field...
January 7, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088066/activity-dependent-development-of-visual-receptive-fields
#15
REVIEW
Andrew Thompson, Alexandra Gribizis, Chinfei Chen, Michael C Crair
It is widely appreciated that neuronal activity contributes to the development of brain representations of the external world. In the visual system, in particular, it is well known that activity cooperates with molecular cues to establish the topographic organization of visual maps on a macroscopic scale [1,2] (Huberman et al., 2008; Cang and Feldheim, 2013), mapping axons in a retinotopic and eye-specific manner. In recent years, significant progress has been made in elucidating the role of activity in driving the finer-scale circuit refinement that shapes the receptive fields of individual cells...
January 11, 2017: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/28087445/distinct-subcomponents-of-mouse-retinal-ganglion-cell-receptive-fields-are-differentially-altered-by-light-adaptation
#16
C S Cowan, J Sabharwal, R L Seilheimer, S M Wu
The remarkable dynamic range of vision is facilitated by adaptation of retinal sensitivity to ambient lighting conditions. An important mechanism of sensitivity adaptation is control of the spatial and temporal window over which light is integrated. The retina accomplishes this by switching between parallel synaptic pathways with differing kinetics and degrees of synaptic convergence. However, the relative shifts in spatial and temporal integration are not well understood - particularly in the context of the antagonistic spatial surround...
January 10, 2017: Vision Research
https://www.readbyqxmd.com/read/28081452/differential-white-matter-involvement-associated-with-distinct-visuospatial-deficits-after-right-hemisphere-stroke
#17
Alex R Carter, Mark P McAvoy, Joshua S Siegel, Xin Hong, Serguei V Astafiev, Jennifer Rengachary, Kristi Zinn, Nicholas V Metcalf, Gordon L Shulman, Maurizio Corbetta
Visuospatial attention depends on the integration of multiple processes, and people with right hemisphere lesions after a stroke may exhibit severe or no visuospatial deficits. The anatomy of core components of visuospatial attention is an area of intense interest. Here we examine the relationship between the disruption of core components of attention and lesion distribution in a heterogeneous group (N = 70) of patients with right hemisphere strokes regardless of the presence of clinical neglect. Deficits of lateralized spatial orienting, measured as the difference in reaction times for responding to visual targets in the contralesional or ipsilesional visual field, and deficits in re-orienting attention, as measured by the difference in reaction times for invalidly versus validly cued targets, were measured using a computerized spatial orienting task...
December 20, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28079833/the-rare-ethambutol-induced-optic-neuropathy-a-case-report-and-literature-review
#18
Wei Song, Shancheng Si
RATIONALE: Ethambutol-induced optic neuropathy (EON) is a well-known complication that results from the use of ethambutol. The ocular manifestations of EON include painless loss of central vision and cecocentral scotomas in the visual field. PATIENT CONCERNS: A 75-year-old Chinese Han man suffered from this rare ocular disorder because he took ethambutol for about 8 months. DIAGNOSES: He was diagnosed as EON based on series of ophthalmic examinations performed...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28079654/retinal-oximetry-in-subjects-with-glaucomatous-hemifield-asymmetry
#19
Zhu Li Yap, Charles Ong, Yi Fang Lee, Andrew Tsai, Clarissa Cheng, Monisha E Nongpiur, Shamira A Perera
PURPOSE: Although some studies suggest a strong link between retinal vessel oxygenation and damage to the retinal nerve fiber layer (RNFL) seen in glaucoma, it has yet to be conclusively proven. This study compares intraocular retinal oximetry in glaucomatous eyes displaying asymmetrically affected hemifields across different subgroups of glaucoma, namely primary angle closure glaucoma (PACG), primary open-angle glaucoma (POAG), and normal tension glaucoma (NTG). METHODS: In this prospective cross-sectional study, 99 patients (PACG, n=28; POAG, n=37; NTG, n=34) underwent retinal oxygenation and vessel caliber measurements using the Oxymap T1 Retinal Oximeter, Cirrus optical coherence tomography, and Humphrey visual field testing...
January 10, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28079653/comparison-of-impact-of-monocular-and-integrated-binocular-visual-fields-on-vision-related-quality-of-life
#20
Yeoun Sook Chun, Dong Ik Lee, Jaein Kwon, In Ki Park
PURPOSE OF THE STUDY: The purpose of the study was to investigate the relationship between vision-related quality of life (VRQOL) and mean deviation (MD) of the monocular visual field and integrated binocular visual field (IBVF). METHODS: One hundred eighty VFs (90 pairs) obtained from 90 patients with normal tension glaucoma were included. VRQOL was evaluated using the 25-item National Eye Institute Visual Function Questionnaire (NEI VFQ-25). IBVF was calculated using maximal sensitivity and binocular summation and IBVF MD was calculated...
January 10, 2017: Journal of Glaucoma
keyword
keyword
92152
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"