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https://www.readbyqxmd.com/read/28531809/multifocal-visual-evoked-potentials-in-optic-neuritis-and-multiple-sclerosis-a-review
#1
REVIEW
Gorm Pihl-Jensen, Mathias Falck Schmidt, Jette Lautrup Frederiksen
Multifocal visual evoked potential (mf-VEP) represents a new approach to the classical full field (ff-)VEP with separate responses from up to 60 sectors of the visual field. A thorough literature survey of the use of mf-VEP in optic neuritis (ON) and multiple sclerosis (MS) is presented (38 published studies were retrieved). Mf-VEP provides direct topographical information of specific lesions and facilitates investigations on structural-functional correlations thus providing new methods for exploring the interplay between demyelination, atrophy and remyelination in MS...
April 11, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28528738/our-initial-experience-with-ventriculo-epiplooic-shunt-in-treatment-of-hydrocephalus-in-two-centers
#2
Valentin Titus Grigorean, Aurelia Mihaela Sandu, Mihai Popescu, Ioan Stefan Florian, Cristian Dumitru Lupascu, Corina Lupascu Ursulescu
INTRODUCTION: Hydrocephalus represents impairment in cerebrospinal fluid (CSF) dynamics. If the treatment of hydrocephalus is considered difficult, the repeated revisions of ventriculo-peritoneal (VP) shunts are even more challenging. OBJECTIVE: The aim of this article is to evaluate the efficiency of ventriculo-epiplooic (VEp) shunt as a feasible alternative in hydrocephalic patients. MATERIAL AND METHODS: A technical modification regarding the insertion of peritoneal catheter was imagined: midline laparotomy 8-10cm long was performed in order to open the peritoneal cavity; the great omentum was dissected between its two layers; we placed the distal end of the catheter between the two epiplooic layers; a fenestration of 4cm in diameter into the visceral layer was also performed...
May 11, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28527030/intravitreal-erythropoietin-injection-in-late-stage-optic-neuropathy-a-safety-study-on-human
#3
Ugur Acar, Bekir Kucuk, Mehmet Koray Sevinc, Seckin Aykas, Mesut Erdurmus, Gungor Sobaci
AIM: To evaluate the whether intravitreal erythropoietin (EPO) administration has any beneficial or adverse effect in patients with late-stage optic neuropathy (ON) or not. METHODS: The study examined 16 eyes of 16 patients who had late-stage ON and ≥1/20 best-corrected visual acuity (BCVA) in their affected eye. There were nonarteritic ischemic ON in 10 (62.5%) eyes, traumatic ON in 4 (25.0%) eyes and methanol-induced ON in 2 (12.5%) eyes. Using pars plana approach, 2000 IU/0...
May 19, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28523237/evoked-potential-changes-in-patients-with-parkinson-s-disease
#4
Chunyan Liu, Yaping Zhang, Weiguo Tang, Binda Wang, Bona Wang, Songbin He
OBJECTIVE: Patients with Parkinson's disease (PD) may have sensory dysfunction, and it can be more easily demonstrated through electrophysiologic testing. We aimed to explore whether the impairment of brainstem visual and auditory passageway exists in PD patients using visual evoked potential (VEP) and brainstem auditory evoked potential (BAEP) examinations. METHODS: Forty-two PD cases and thirty controls participated in the study. All subjects underwent the VEP and BAEP examinations...
May 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28514317/impact-of-age-on-short-term-outcomes-of-liver-surgery-lessons-learned-in-10-years-experience-in-a-tertiary-referral-hepato-pancreato-biliary-center
#5
Andrea Ruzzenente, Simone Conci, Andrea Ciangherotti, Tommaso Campagnaro, Alessandro Valdegamberi, Francesca Bertuzzo, Fabio Bagante, Guido Mantovani, Michela De Angelis, Adriano E Dorna, Marco Piccino, Corrado Pedrazzani, Alfredo Guglielmi, Calogero Iacono
We investigate the surgical outcomes of patients undergoing hepatectomy according to different age intervals, identify the clinical factors related to surgical outcomes, and propose clinical risk scores for severe morbidity and mortality based on the clinical factors.Eight hundred three patients undergoing liver resection were divided into 3 groups: young patients (YP), <65 years (n = 387), elderly patients (EP), from 65 to 74 years (n = 279); very-elderly patients (VEP), ≥75 years (n = 137)...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28503425/neuroprotective-effects-of-gypenosides-in-experimental-autoimmune-optic-neuritis
#6
Hong-Kan Zhang, Yuan Ye, Zhen-Ni Zhao, Kai-Jun Li, Yi Du, Qiu-Ming Hu, Jian-Feng He
AIM: To determine whether gypenosides have protective effects in experimental autoimmune optic neuritis (EAON). METHODS: Mice were randomly divided into seven groups: control group, model group, three different density gypenosides monotherapy, methylprednisolone monotherapy, combination of gypenosides and methylprednisolone group. The control group was subcutaneously injected with oil emulsion adjuvant and all other groups were subcutaneously immunized with an emulsified mixture of myelin oligodendrocyte glycoprotein (MOG) 35-55 peptide to induce EAON...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28503341/peripheral-and-central-nervous-system-involvement-in-recently-diagnosed-cases-of-hypothyroidism-an-electrophysiological-study
#7
N Gupta, M Arora, R Sharma, K S Arora
BACKGROUND: Hypothyroidism, one of the most common endocrine disorders, may induce neurological abnormalities at an early stage of the disease. AIM: The study was designed to assess the electrophysiological alterations of some selected variables of nerve conduction, brainstem auditory evoked potentials (BAEPs), and visual evoked potentials (VEPs) in hypothyroid patients. SUBJECTS AND METHODS: Sixty patients of newly diagnosed hypothyroidism and an equal number of age-matched controls were selected for the study...
September 2016: Annals of Medical and Health Sciences Research
https://www.readbyqxmd.com/read/28487376/visual-and-ocular-motor-function-in-the-atypical-form-of-neurodegeneration-with-brain-iron-accumulation-type-i
#8
Joana Jesus-Ribeiro, Cláudia Farinha, Margarida Amorim, Anabela Matos, Aldina Reis, João Lemos, Miguel Castelo-Branco, Cristina Januário
BACKGROUND/AIMS: Neurodegeneration with brain iron accumulation (NBIA) type I is a rare disease that can be divided into a classical or atypical variant, according to age of onset and clinical pattern. Neuro-ophthalmological involvement has been documented in the classical variant but only anecdotically in the atypical variant. We sought to describe the visual and ocular motor function in patients with atypical form of NBIA type I. METHODS: Cross-sectional study, including patients with genetically confirmed NBIA type I and classified as atypical variant, who underwent ophthalmological examination with best corrected visual acuity (BCVA), optical coherence tomography (OCT), fundus autofluorescence (FAF), electroretinography (ERG), visual evoked potentials (VEP) and video-oculography...
May 9, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28474167/effects-of-stimulus-size-and-contrast-on-the-initial-primary-visual-cortical-response-in-humans
#9
Nigel Gebodh, M Isabel Vanegas, Simon P Kelly
Decades of intracranial electrophysiological investigation into the primary visual cortex (V1) have produced many fundamental insights into the computations carried out in low-level visual circuits of the brain. Some of the most important work has been simply concerned with the precise measurement of neural response variations as a function of elementary stimulus attributes such as contrast and size. Surprisingly, such simple but fundamental characterization of V1 responses has not been carried out in human electrophysiology...
May 4, 2017: Brain Topography
https://www.readbyqxmd.com/read/28456889/childhood-hereditary-ataxias-experience-from-a-tertiary-referral-university-hospital-in-turkey
#10
Elif Acar Arslan, Rahşan Göçmen, Kader Karlı Oğuz, Gökçen Düzgün Konuşkan, Esra Serdaroğlu, Haluk Topaloğlu, Meral Topçu
Hereditary ataxias are a group of genetic disorders that are progressive and heterogeneous. The purpose of this study was to develop a practical and time-efficient approach to diagnosing childhood hereditary ataxias by analyzing characteristics and final diagnosis at a tertiary referral clinic for pediatric neurology. 196 patients admitted to the pediatric neurology department were included. The medical records were examined for demographic features, neurological, laboratory, electrophysiological, cranial imaging, and pathological findings, and for genetic studies...
April 29, 2017: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/28456522/how-handedness-influences-perceptual-and-attentional-processes-during-rapid-serial-visual-presentation
#11
Kamila Śmigasiewicz, Matthias Liebrand, Johannes Landmesser, Rolf Verleger
Stimulus-driven orienting of visual attention is lateralized to the right hemisphere (RH). This lateralization has been studied in the dual-stream rapid serial visual presentation task (dual RSVP). In this task a second target (T2), hard to discern by being embedded in one of two lateral streams of rapidly changing distractors, is better identified on the left than on the right. This phenomenon is called the left visual field advantage (LVFA). Furthermore, in terms of event related potentials (ERPs), the N2pc component and visual evoked potentials (VEPs) are evoked earlier at the RH than at the left hemisphere (LH)...
April 26, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28421377/vep-and-perg-in-patients-with-multiple-sclerosis-with-and-without-a-history-of-optic-neuritis
#12
M Janáky, Á Jánossy, G Horváth, G Benedek, G Braunitzer
PURPOSE: Visual electrophysiology is routinely used to detect the visual complications of multiple sclerosis, but the analysis mostly focuses on visual evoked potential (VEP) and especially the P100 component. Our goal was to analyze the components and waveform alterations of VEPs and pattern electroretinograms (PERGs) in patients with multiple sclerosis (MS) with good vision. METHODS: The main VEP and PERG components of 85 patients with MS were analyzed in two groups: 38 patients who had optic neuritis in their history (ON group) and 47 patients who had never had optic neuritis (MS group)...
April 18, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28408638/blindfolding-during-wakefulness-causes-decrease-in-sleep-slow-wave-activity
#13
Eva Magdalena Korf, Matthias Mölle, Jan Born, Hong-Viet V Ngo
Slow wave activity (SWA, 0.5-4 Hz) represents the predominant EEG oscillatory activity during slow wave sleep (SWS). Its amplitude is considered in part a reflection of synaptic potentiation in cortical networks due to encoding of information during prior waking, with higher amplitude indicating stronger potentiation. Previous studies showed that increasing and diminishing specific motor behaviors produced corresponding changes in SWA in the respective motor cortical areas during subsequent SWS Here, we tested whether this relationship can be generalized to the visual system, that is, whether diminishing encoding of visual information likewise leads to a localized decrease in SWA over the visual cortex...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28393030/surgical-treatment-and-visual-outcomes-of-cataract-with-persistent-hyperplastic-primary-vitreous
#14
Li Li, Da-Bei Fan, Ya-Ting Zhao, Yun Li, Fang-Fei Cai, Guang-Ying Zheng
AIM: To evaluate the surgical treatment and visual outcomes of eyes with cataract and persistent hyperplastic primary vitreous (PHPV). METHODS: This retrospective study included patients with cataract and PHPV treated with various strategies. Anterior PHPV was treated using phacoemulsification with underwater electric coagulation on posterior capsule neovascularization, posterior capsulotomy, anterior vitrectomy, and intraocular lens (IOL) implantation. Posterior PHPV was treated with lensectomy, posterior vitrectomy, retinal photocoagulation, and IOL implantation or silicone oil tamponade...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28369421/searching-for-biomarkers-of-cdkl5-disorder-early-onset-visual-impairment-in-cdkl5-mutant-mice
#15
Raffaele Mazziotti, Leonardo Lupori, Giulia Sagona, Mariangela Gennaro, Grazia Della Sala, Elena Putignano, Tommaso Pizzorusso
CDKL5 disorder is a neurodevelopmental disorder still without a cure. Murine models of CDKL5 disorder have been recently generated raising the possibility of preclinical testing of treatments. However, unbiased, quantitative biomarkers of high translational value to monitor brain function are still missing. Moreover, the analysis of treatment is hindered by the challenge of repeatedly and noninvasively testing neuronal function.We analyzed the development of visual responses in a mouse model of CDKL5 disorder to introduce visually evoked responses as a quantitative method to assess cortical circuit function...
March 28, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28367282/intraoperative-monitoring-of-flash-visual-evoked-potential-under-general-anesthesia
#16
Hironobu Hayashi, Masahiko Kawaguchi
In neurosurgical procedures that may cause visual impairment in the intraoperative period, the monitoring of flash visual evoked potential (VEP) is clinically used to evaluate visual function. Patients are unconscious during surgery under general anesthesia, making flash VEP monitoring useful as it can objectively evaluate visual function. The flash stimulus input to the retina is transmitted to the optic nerve, optic chiasm, optic tract, lateral geniculate body, optic radiation (geniculocalcarine tract), and visual cortical area, and the VEP waveform is recorded from the occipital region...
April 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/28361176/electrophysiological-assessment-for-early-detection-of-retinal-dysfunction-in-%C3%AE-thalassemia-major-patients
#17
Maria Dettoraki, Antonis Kattamis, Ioannis Ladas, Konstantinos Maragkos, Chryssanthi Koutsandrea, Klio Chatzistefanou, Konstantinos Laios, Dimitrios Brouzas, Marilita M Moschos
PURPOSE: The purpose of this study was to assess the role of various diagnostic tests in early detection of retinal changes in β-thalassemia major patients. METHODS: Thirty-eight visually asymptomatic β-thalassemia major patients receiving regular blood transfusions and iron-chelation therapy with deferoxamine (group A, n = 13), deferasirox (group B, n = 11) or deferoxamine with deferiprone (group C, n = 14) and fourteen age- and sex- matched healthy individuals were included in the study...
March 30, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28355737/-clinical-features-and-prognostic-analysis-of-neuromyelitisoptica-spectrum-disease-with-sjogrensyndrome
#18
N Jia, Y Jing, Q C Li, L Liu, J W Wang, X M Hu
Objective: To explore the clinical features and conduct prognostic analysis about visual recovery and relapse of neuromyelitisoptica (NMO) spectrum disease (NMOSD) with sjogren syndrome (SS). Methods: A retrospective and prospective observational study was conducted.Between July 2013 and June 2016, 172 patients with NMOSD (NMOSD-non SS: 116/172, 67.4%; NMOSD-SS: 56/172, 32.6%) were assessed at Beijing Tongren Hospital, Capital Medical University, Beijing, China.The prognostic factors of NMOSD-SS patients were also analyzed...
March 21, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28343723/-the-search-for-electrophysiological-predictors-of-visual-comfort-after-presbyopia-correction-with-contact-lenses
#19
A El Ameen, S Majzoub, P-J Pisella
Starting at 40 years of age, prespyopia affects a quarter of the world population. Many techniques of presbyopia surgery have emerged in recent years. The purpose of this study was to compare monovision and multifocality and to identify clinical and electrophysiological predictive markers of visual comfort for each correction available in clinical practice. Ten presbyopic patients participated in this study. Patients received monovision and multifocal correction using contact lenses for three weeks each in a random order...
April 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28343188/multimodal-evoked-potentials-in-patients-with-multiple-sclerosis-in-assessment-of-the-course-of-the-disease
#20
Beata Łabuz-Roszak, Magdalena Torbus, Katarzyna Kubicka-Bączyk, Agnieszka Machowska-Majchrzak, Agata Kierber, Katarzyna Borucka, Małgorzata Zellner, Anna Starostak-Tatar, Krystyna Pierzchała
INTRODUCTION: Multiple sclerosis (MS) is a chronic inflammatory, demyelinating disease of the central nervous system with a multifocal damage. THE AIM: The assessment of the MS course by multimodal evoked potentials (EP). MATERIAL AND METHODS: We evaluated 95 patients (63 female, 32 male) with relapsing-remitting MS in the average age of 36.4±10.4. The average disease duration was 4.6±7.4 year. Among them, 48 patients (50.5%) were treated with immunomodulatory drugs...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
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