keyword
MENU ▼
Read by QxMD icon Read
search

VEP

keyword
https://www.readbyqxmd.com/read/28100483/electrophysiological-changes-in-12-year-old-children-born-mlp-reduced-vep-amplitude-in-mlp-children
#1
Lina H Raffa, Josefin Nilsson, Jovanna Dahlgren, Marita Andersson Grönlund
AIM: To study the electrophysiological changes in relation to fundus morphology in moderate-to-late preterm (MLP) children with no previous history of retinopathy of prematurity. METHODS: Visual acuity (VA), refraction and fundus variables measured by optical coherence tomography, pattern reversal visual evoked potentials and full-field electroretinography (ff-ERG) were obtained from 22 twelve-year-old MLP children (11 male, 11 female) and 21 full-term controls...
January 18, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28089743/multichannel-visual-evoked-potentials-in-the-assessment-of-visual-pathways-in-children-with-marked-brain-abnormalities
#2
Sian E Handley, Alki C Liasis
PURPOSE: To demonstrate how multichannel visual evoked potentials (VEPs) can provide quantitative measures of visual function in in children with marked cortical anatomy abnormalities. METHODS: Four children with marked brain pathology (2 holoprosencephaly, 2 giant interhemispheric cysts with hydrocephalus) underwent pattern reversal and flash VEP recordings from 16 equally distributed electrodes. Voltage maps of the major VEP components were constructed, and their distributions were compared to the magnetic resonance imaging (MRI) findings...
January 9, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28088936/endoscopic-decompression-of-the-optic-canal-for-traumatic-optic-neuropathy
#3
Zhen-Hua He, Zheng-Bo Lan, Ao Xiong, Guo-Kuo Hou, Ya-Wen Pan, Qiang Li, Xin-Ding Zhang
PURPOSE: Traumatic optic neuropathy (TON) is a serious complication of head trauma with the incidence rate of 0.5%-5%. The aim of this study was to investigate the therapeutic efficacy of endoscopic decompression of the optic canal for optic nerve injuries. METHODS: In this study, 11 patients treated in our hospital from January 2009 to January 2015 with the visual loss resulting from TON were retrospectively reviewed for preoperative vision, visual evoked potential (VEP) scan, surgical approach, postoperative visual acuity, complications, and follow-up results...
December 1, 2016: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28074347/pattern-and-motion-related-visual-evoked-potentials-in-hiv-infected-adults
#4
Jana Szanyi, Jan Kremlacek, Zuzana Kubova, Miroslav Kuba, Pavel Gebousky, Jaroslav Kapla, Juraj Szanyi, Frantisek Vit, Jana Langrova
PURPOSE: The goal of the current study was to explore visual function in virally suppressed HIV patients undergoing combined antiretroviral therapy (cART) by using pattern-reversal and motion-onset visual evoked potentials (VEPs). METHODS: The pattern-reversal and motion-onset VEPs were recorded in 20 adult HIV+ patients with a mean age of 38 years and CD4 cell counts ≥230 × 10(6) cells/L of blood. RESULTS: Nine out of 20 patients displayed VEP abnormalities...
January 10, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28054250/pupil-cycle-time-as-indicator-of-visual-pathway-dysfunction-in-multiple-sclerosis
#5
Eyyup Karahan, Omer Karti, Aslı Koskderelioglu, Dilek Top Karti, Murat Uyar, Murat Yildirim Kale, Muhtesem Gedizlioglu
To evaluate the value of pupil cycle time (PCT) as an indicator of optic nerve dysfunction in patients with multiple sclerosis (MS), 42 patients with MS and 35 control subjects were included to the study. Patients with MS with a history of ON were accepted as group 1, without a history of ON as group 2 and healthy control subjects as group 3. Groups were compared with Chi-square and one-way ANOVA tests. Correlations of PCT results with age, best corrected visual acuity, duration of MS, visual field (VF) test, visual evoked potential (VEP) latans, retinal nerve fiber layer (RNFL), and ganglion cell layer-inner plexiform layer (GCL-IPL) thicknesses were analyzed...
January 4, 2017: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/28054161/the-relationship-of-nystagmus-waveform-on-the-vep-response-in-infantile-nystagmus-syndrome-a-small-case-series
#6
John P Kelly, James O Phillips, Avery H Weiss
PURPOSE: The relationship between eye movements and the visual evoked potential (VEP) response was examined in two subjects with infantile nystagmus syndrome (INS). Changes in VEP amplitude were compared between periods of foveation versus periods of high-frequency nystagmus. An analysis is proposed that improves extraction of the checkerboard reversal VEP signal from subjects with INS. METHODS: INS subjects were 2 healthy children (12-13 years old) with 20/40 or better corrected acuity...
January 5, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28049030/pregabalin-enhances-myelin-repair-and-attenuates-glial-activation-in-lysolecithin-induced-demyelination-model-of-rat-optic-chiasm
#7
Danyal Daneshdoust, Mohsen Khalili-Fomeshi, Maryam Ghasemi-Kasman, Davoud Ghorbanian, Mona Hashemian, Mohammad Gholami, Aliakbar Moghadamnia, Amir Shojaei
Multiple sclerosis (MS) is an autoimmune disease in which more than 70% of patients experience visual disturbance as the earliest symptoms. Lysolecithin (LPC)-induced focal demyelination model has been developed to evaluate the effects of different therapies on myelin repair improvement. In this study, the effects of pregabalin administration on myelin repair and glial activation were investigated. Local demyelination was induced by administration of LPC (1%, 2μL) into the rat optic chiasm. Rats underwent daily injection of pregabalin (30mg/kg, i...
January 1, 2017: Neuroscience
https://www.readbyqxmd.com/read/28043855/age-related-alterations-in-human-neocortical-plasticity
#8
M J Spriggs, C J Cadwallader, J P Hamm, L J Tippett, I J Kirk
Age-related changes in neuroplasticity may be central to the cognitive decline associated with healthy ageing. Modulated Long-Term Potentiation (LTP) and Long-Term Depression (LTD) have been repeatedly demonstrated in aged rodents, however the translation to human research has been limited by a scarcity of non-invasive methods for doing so. We have previously demonstrated that, following a block of high frequency presentations of a visual stimulus (referred to as a "visual tetanus"), there is a LTP-like enhancement of the N1b component of the visually evoked potential (VEP) to subsequent low frequency presentations of the same stimulus...
December 30, 2016: Brain Research Bulletin
https://www.readbyqxmd.com/read/28039596/optic-neuritis-secondary-to-antiandrogen-therapy
#9
REVIEW
Á Ní Mhéalóid, G Cunniffe
BACKGROUND: Optic neuropathy is a disorder characterised by dysfunction or destruction of the optic nerve tissues. Acquired causes include interruption in the blood supply, nutritional deficiency, compression by a tumour or aneurysm, trauma, and toxic types (Ambizas and Patel In US Pharm 36(4):HS2-HS6, 1). Drug-induced optic neuropathy is of the toxic type and can be defined as a clinical syndrome characterised by papillomacular bundle damage, central, or cecocentral scotoma, and reduced colour vision (Ambizas and Patel In US Pharm 36(4):HS2-HS6, 2011; Sharma and Sharma In Indian J Ophthalmol 59(2):137-141, 2)...
December 30, 2016: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/27998453/-clinical-features-of-neurosyphilis-with-optic-neuritis-as-an-initial-finding
#10
S S Cao, H Y Li, Q G Xu, S Y Tan, S H Wei
Objective: To study the characteristics of neurosyphilis with optic neuritis as an initial finding. Methods: Retrospective analysis of clinical data and laboratory testing results of 16 cases (27 eyes) with optic neuritis as an initial finding of neurosyphilis from October 2010 to March 2015 in General Hospital of People's Liberation Army was made. Results: Six-teen patients (12 males, 4 females) were collected, the median age of patients was 47 (range 33 to 65) years ,the mean age was (49.63±9.05) years. Treponema pallidum particle agglutination assay (TPPA) analysis was positive in all of the patients and rapid plasma reagin (RPR) test was positive in 14 patients (2 patients did not test)...
December 11, 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27995607/longchain-polyunsaturated-fatty-acid-supplementation-in-preterm-infants
#11
REVIEW
Kwi Moon, Shripada C Rao, Sven M Schulzke, Sanjay K Patole, Karen Simmer
BACKGROUND: Controversy exists over whether longchain polyunsaturated fatty acids (LCPUFA) are essential nutrients for preterm infants because they may not be able to synthesise sufficient amounts of LCPUFA to meet the needs of the developing brain and retina. OBJECTIVES: To assess whether supplementation of formula milk with LCPUFA is safe and of benefit to preterm infants. The main areas of interest were the effects of supplementation on the visual function, development and growth of preterm infants...
December 20, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27987178/variant-effect-prediction-analysis-using-resources-available-at-gramene-database
#12
Sushma Naithani, Matthew Geniza, Pankaj Jaiswal
The goal of Gramene database ( www.gramene.org ) is to empower the plant research community in conducting comparative genomics studies across model plants and crops by employing a phylogenetic framework and orthology-based projections. Gramene database (release #49) provides resources for comparative plant genomics including well-annotated plant genomes (39 complete reference genomes and six partial genomes), genetic or structural variation data for 14 plant species, pathways for 58 plant species, and gene expression data for 14 species including Arabidopsis, rice, maize, soybean, wheat, etc...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27984836/-do-we-still-need-electrophysiology-in-ophthalmology
#13
H Tegetmeyer
Electrophysiological methods in clinical ophthalmology include the full-field electroretinogram (ERG) for assessment of outer and middle retinal layers, pattern ERG (PERG) for assessment of ganglion cell function, the electrooculogram (EOG) for assessment of retinal pigment epithelium function, as well as visual evoked potentials (VEP) for assessment of the visual pathway, including the optic nerve and visual cortex. Multifocal recording techniques for ERG and VEP are used for tests within selected areas of the visual field...
December 2016: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/27982206/dysfunction-in-the-fellow-eyes-of-strabismic-and-anisometropic-amblyopic-children-assessed-by-visually-evoked-potentials
#14
Eric Pinheiro Andrade, Adriana Berezovsky, Paula Yuri Sacai, Josenilson Martins Pereira, Daniel Martins Rocha, Solange Rios Salomão
Purpose: To evaluate visual acuity and transient pattern reversal (PR) visual evoked potentials (VEPs) in the fellow eyes of children with strabismic and/or anisometropic amblyopia. Methods: Children diagnosed with strabismic and/or anisometropic amblyopia were recruited for electrophysiological assessment by VEPs. Monocular grating and optotype acuity were measured using sweep-VEPs and an Early Treatment Diabetic Retinopathy Study chart, respectively. During the same visit, transient PR-VEPs of each eye were recorded using stimuli subtending with a visual angle of 60', 15', and 7...
September 2016: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/27922231/evaluation-of-central-nervous-system-in-patients-with-glycogen-storage-disease-type-1a
#15
Yusuf Aydemir, Figen Gürakan, İnci Nur Saltık Temizel, Hülya Demir, Kader Karlı Oğuz, Dilek Yalnızoğlu, Meral Topçu, Hasan Özen, Aysel Yüce
We aimed to evaluate structure and functions of central nervous system (CNS) in children with glycogen storage disease (GSD) type 1a. Neurological examination, psychometric tests, electroencephalography (EEG), magnetic resonance imaging (MRI), visual evoked potentials (VEP) and brainstem auditory evoked potentials (BAEP) were performed. The results were compared between patients with good and poor metabolic control and healthy children. Twenty-three patients with GSD type 1a were studied. Twelve patients were in poor metabolic control group and 11 patients in good metabolic control group...
2016: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/27919490/quantitative-visual-tests-after-poorly-recovered-optic-neuritis-due-to-multiple-sclerosis
#16
Erin E Longbrake, Samantha Lancia, Nhial Tutlam, Kathryn Trinkaus, Robert T Naismith
BACKGROUND: Visual dysfunction in MS can be quantified using a variety of tests. Many vision tests have not been formally evaluated among MS patients with existing visual dysfunction. OBJECTIVE: Evaluate several versions of visual acuity and contrast sensitivity tests, measures of central and peripheral vision, retina structure, electrophysiologic function, and quality of life among MS patients with moderate/severe visual dysfunction. METHODS: Cross-sectional study of 46 patients with stable, incompletely recovered optic neuritis...
November 2016: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/27910862/methylphenidate-enhances-early-stage-sensory-processing-and-rodent-performance-of-a-visual-signal-detection-task
#17
Rachel L Navarra, Brian D Clark, Andrew T Gargiulo, Barry D Waterhouse
Methylphenidate (MPH) is used clinically to treat attention-deficit/hyperactivity disorder (ADHD) and off-label as a performance enhancing agent in healthy individuals. MPH enhances catecholamine transmission via blockade of norepinephrine (NE) and dopamine (DA) reuptake transporters. However, it is not clear how this action impacts neural circuits performing cognitive and sensorimotor functions driving performance enhancement. The dorsal lateral geniculate nucleus (dLGN) is the primary thalamic relay for visual information from the retina to the cortex and is densely innervated by NE-containing fibers from the locus coeruleus (LC), a pathway known to modulate state-dependent sensory processing...
December 2, 2016: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27882486/vep-analysis-methods-in-children-with-optic-nerve-hypoplasia-relationship-to-visual-acuity-and-optic-disc-diameter
#18
John P Kelly, James O Phillips, Avery H Weiss
PURPOSE: Assessing vision in young children with optic nerve hypoplasia (ONH) is challenging due to multi-directional infantile nystagmus, the range of optic nerve loss, and cognitive delay. This study examined visual evoked potential (VEP) responses and averaging techniques in children with ONH. The assumption is that EEG epochs with inconsistent temporal phase would be associated with nystagmus, signal reduction due to axon loss, and visual inattention. METHODS: A retrospective chart review was performed on 44 children (average age 2...
November 23, 2016: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/27874946/visual-and-somotosensory-evoked-potentials-in-asymptomatic-patients-with-vitamin-b12-deficiency
#19
B Gökçe Çokal, H N Güneş, S K Güler, T K Yoldaş
OBJECTIVE: Vitamin B12 deficiency may be asymptomatic or present with a wide range of neurological and hematological disorders. Our aim in this study is to evaluate visual (VEP) and somatosensory evoked potential (SEP) parameters in patients with vitamin B12 deficiency who had no clinical evidence of visual impairment or neurological syndrome findings and compare the findings with healthy controls to determine whether there is a correlation between VEP and SEP parameters and serum vitamin B12 levels...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27864655/imitating-the-effect-of-amblyopia-on-vep-based-acuity-estimates
#20
Sven P Heinrich, Celia M Bock, Michael Bach
PURPOSE: Acuity testing based on visual evoked potentials (VEPs) overestimates acuity in patients with amblyopia. We hypothesized that distortion and fragmentation of the stimulus in amblyopia impede recognition of optotypes, while it leaves the pattern onset response in the VEP mostly unaffected, resulting in overestimation of acuity. METHODS: Acuity VEPs were recorded in visually normal participants with the stimulus degraded by patterned polymethyl methacrylate panes, which induce distortion and fragmentation...
November 18, 2016: Documenta Ophthalmologica. Advances in Ophthalmology
keyword
keyword
57042
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"