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https://www.readbyqxmd.com/read/29241172/neurophysiological-monitoring-and-awake-craniotomy-for-resection-of-intracranial-gliomas
#1
Taiichi Saito, Manabu Tamura, Mikhail F Chernov, Soko Ikuta, Yoshihiro Muragaki, Takashi Maruyama
Aggressive resection of intracranial gliomas has a positive impact on patients' prognosis, but is associated with a risk of neurological complications. For preservation of brain functions and avoidance of major postoperative morbidity various methods of intraoperative neurophysiological monitoring have been introduced into clinical practice. At present, somatosensory evoked potentials (SSEP), motor evoked potentials (MEP), visual evoked potentials (VEP), brainstem auditory evoked potentials (BAEP), and electrocorticography (ECoG) are used routinely during neurosurgical procedures...
2018: Progress in Neurological Surgery
https://www.readbyqxmd.com/read/29234872/-multimodal-imaging-in-goldmann-favre-syndrome
#2
D Valler, M Ulbig, C P Lohmann, M Maier
Case report of a 23-year-old male patient suffering from Goldmann-Favre syndrome. The patient reported bilateral visual loss since 10 years of age and difficulties with dark adaptation for 2 years. Until recently a final diagnosis was not found. Multimodal imaging using multicolor fundus imaging (MCFI), optical coherence tomography (OCT), fundus autofluorescence (FAF), fluorescein angiography (FLA), electroretinography (ERG) and visual evoked potential (VEP) confirmed the diagnosis. We describe multimodal imaging of this rare hereditary retinal dystrophy...
December 12, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/29234179/vitamin-e-coated-polysulfone-membrane-based-hemodiafiltration-attenuates-inflammation-in-a-rat-model-of-lipopolysaccharide-induced-systemic-inflammation
#3
Yoshihiro Hatanaka, Satoru Inoue, Koji Goto, Norihisa Yasuda, Seigo Hidaka, Takaaki Kitano
Background: Acute blood purification (ABP) therapy is used regularly in the clinical setting and reportedly alleviates organ failure associated with severe systemic inflammatory responses, leading to reduced mortality. The present study aimed to determine whether there is a difference in efficacy between polysulfone (PS) membranes, which are currently used regularly in the clinical setting, and vitamin E-coated polysulfone (VEPS) membranes, which are anticipated to exhibit the antioxidant and anti-inflammatory properties of vitamin E...
September 2017: Iranian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29197616/the-effect-of-monitor-raster-latency-on-veps-erps-and-brain-computer-interface-performance
#4
Sebastian Nagel, Werner Dreher, Wolfgang Rosenstiel, Martin Spüler
BACKGROUND: Visual neuroscience experiments and Brain-Computer Interface (BCI) control often require strict timings in a millisecond scale. As most experiments are performed using a personal computer (PC), the latencies that are introduced by the setup should be taken into account and be corrected. As a standard computer monitor uses a rastering to update each line of the image sequentially, this causes a monitor raster latency which depends on the position, on the monitor and the refresh rate...
November 29, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29193050/antagonistic-relationship-between-vep-potentiation-and-gamma-power-in-visual-snow-syndrome
#5
Sebastian Luna, Daniel Lai, Alison Harris
OBJECTIVE: Using a "double-pulse" adaptation paradigm, in which two stimuli are presented in quick succession, this study examines the neural mechanisms underlying potentiation of the visual evoked potential (VEP) in visual snow syndrome. BACKGROUND: Visual snow is a persistent visual disturbance characterized by rapid flickering dots throughout the visual field. Like the related condition of migraine with aura, visual snow has been hypothesized to arise from abnormal neuronal responsiveness, as demonstrated by a lack of typical VEP habituation to repeated visual stimulation...
November 29, 2017: Headache
https://www.readbyqxmd.com/read/29190524/four-dimensional-map-of-the-human-early-visual-system
#6
Yasuo Nakai, Akari Nagashima, Akane Hayakawa, Takuya Osuki, Jeong-Won Jeong, Ayaka Sugiura, Erik C Brown, Eishi Asano
OBJECTIVE: We generated a large-scale, four-dimensional map of neuronal modulations elicited by full-field flash stimulation. METHODS: We analyzed electrocorticography (ECoG) recordings from 63 patients with focal epilepsy, and delineated the spatial-temporal dynamics of visually-elicited high-gamma70-110 Hz amplitudes on a standard brain template. We then clarified the neuronal events underlying visual evoked potential (VEP) components, by correlating with high-gamma amplitude measures...
November 27, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29190019/visual-evoked-potentials-in-glaucoma-and-alzheimer-s-disease
#7
Elisa Cerri, Carlotta Fabiani, Chiara Criscuolo, Luciano Domenici
Visual responses to gratings alternating in contrast have been studied in humans and several mammalian species. Previous evidence from human patients and animal models of neurodegeneration has highlighted the importance to record simultaneously the pattern electroretinogram (P-ERG) and visual evoked cortical potentials (VEPs) to investigate retinal and post-retinal sites of neurodegeneration.In view of the increasing importance of research on experimental models of neurodegenerative diseases, we present here the parametric properties of visual evoked responses in animal models of glaucoma and Alzheimer's disease...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29184095/exteroceptive-expectations-modulate-interoceptive-processing-repetition-suppression-effects-for-visual-and-heartbeat-evoked-potentials
#8
Amanda C Marshall, Antje Gentsch, Valentina Jelinčić, Simone Schütz-Bosbach
Interoception refers to the signaling of internal bodily commands. Here, we explore repetition suppression of intero- and exteroceptive neural markers to test whether the perception and predictability of exteroceptive stimulus material affects their expression. Participants completed a repetition suppression paradigm in which angry or neutral facial expressions repeated or alternated. Participants received either an implicit (experiment 1) or explicit (experiment 2) cue enabling the formation of expectations regarding the upcoming facial expression...
November 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29172994/amiloride-does-not-protect-retinal-nerve-fibre-layer-thickness-in-optic-neuritis-in-a-phase-2-randomised-controlled-trial
#9
Justin B McKee, Charles L Cottriall, John Elston, Simon Epps, Nikos Evangelou, Stephen Gerry, Christopher Kennard, Yazhuo Kong, Abigail Koelewyn, Wilhelm Kueker, Maria Isabel Leite, Jacqueline Palace, Matthew Craner
BACKGROUND: Recent basic and clinical evidence suggests amiloride may be neuroprotective in multiple sclerosis (MS) through the blockade of the acid sensing ion channel (ASIC). OBJECTIVE: To examine the neuroprotective efficacy of amiloride in acute optic neuritis (ON). METHODS: A total of 48 patients were recruited to a phase 2, double blind, single site, randomised controlled trial. Scanning laser polarimetry (GDx) at 6 months was the primary outcome measure and optical coherence tomography (OCT) and visual and electrophysiological measures were secondary outcome measures...
November 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/29170625/connectopathy-in-autism-spectrum-disorders-a-review-of-evidence-from-visual-evoked-potentials-and-diffusion-magnetic-resonance-imaging
#10
REVIEW
Takao Yamasaki, Toshihiko Maekawa, Takako Fujita, Shozo Tobimatsu
Individuals with autism spectrum disorder (ASD) show superior performance in processing fine details; however, they often exhibit impairments of gestalt face, global motion perception, and visual attention as well as core social deficits. Increasing evidence has suggested that social deficits in ASD arise from abnormal functional and structural connectivities between and within distributed cortical networks that are recruited during social information processing. Because the human visual system is characterized by a set of parallel, hierarchical, multistage network systems, we hypothesized that the altered connectivity of visual networks contributes to social cognition impairment in ASD...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29155346/intraoperative-monitoring-of-the-integrity-of-the-anterior-visual-pathways-a-methodological-review-and-meta-analysis
#11
REVIEW
Hussam Metwali, Katja Kniese, Rudolf Fahlbusch
INTRODUCTION: Diverse methods have been developed for intraoperative monitoring of the integrity of the visual pathways. We performed a review of the literature to determine the methodology of each technique as well as their recent development. The predictive power of each eligible technique was determined based on a meta-analysis. METHODS: A review of the literature was performed according to PRISMA statement. The techniques, which were adopted for intraoperative monitoring of the integrity of the visual pathways, were extracted and described...
November 16, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29149913/subadditive-responses-to-extremely-short-blue-and-green-pulsed-light-on-visual-evoked-potentials-pupillary-constriction-and-electroretinograms
#12
Soomin Lee, Yuria Uchiyama, Yoshihiro Shimomura, Tetsuo Katsuura
BACKGROUND: The simultaneous exposure to blue and green light was reported to result in less melatonin suppression than monochromatic exposure to blue or green light. Here, we conducted an experiment using extremely short blue- and green-pulsed light to examine their visual and nonvisual effects on visual evoked potentials (VEPs), pupillary constriction, electroretinograms (ERGs), and subjective evaluations. METHODS: Twelve adult male subjects were exposed to three light conditions: blue-pulsed light (2...
November 17, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/29142087/no-evidence-of-disease-activity-is-associated-with-reduced-rate-of-axonal-retinal-atrophy-in-ms
#13
Marco Pisa, Simone Guerrieri, Giovanni Di Maggio, Stefania Medaglini, Lucia Moiola, Vittorio Martinelli, Giancarlo Comi, Letizia Leocani
OBJECTIVE: To explore, in a longitudinal study, the usefulness of optical coherence tomography (OCT) in monitoring people with multiple sclerosis (MS) by testing the association between retinal nerve fiber layer (RNFL) thinning and clinical and brain MRI criteria of no evidence of disease activity (NEDA). METHODS: OCT, visual evoked potentials (VEPs), and disability, using the Expanded Disability Status Scale (EDSS), were tested at baseline and after 2 years in 72 patients, 63 with routine yearly brain MRI...
November 15, 2017: Neurology
https://www.readbyqxmd.com/read/29137569/the-neuro-ophthalmological-effects-related-to-long-term-occupational-exposure-to-organic-solvents-in-painters
#14
Heba Khodary Allam, Shaimaa Soliman, Tamer Wasfy, Ahmed Ghoneim, Yasser Serag, Grace Simbajwe
PURPOSE: Organic solvents are widely used in many industries, and usually, exposure occurs with mixtures of solvents. Organic solvent mixtures are known for their ability to affect tissues of high lipid content including the myelin sheath in the nervous system. The purpose of this work was to study the evidence that long-term (more than 10 years) exposure to organic solvent mixtures among painters can induce neuro-ophthalmological effects on the function of retinal ganglion cells and the optic tract...
January 1, 2017: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/29134296/p300-based-acuity-estimation-in-imitated-amblyopia
#15
Marvin L Beusterien, Sven P Heinrich
PURPOSE: A frequent approach to estimating visual acuity objectively is the recording of visual evoked potentials (VEPs) to patterns of different coarseness. This, however, overestimates acuity in patients with fragmented and distorted vision such as in amblyopia. This is likely due to VEP-based techniques using checkerboard or grating stimuli. We hypothesized that no overestimation would occur when the event-related potential P300 in response to optotype stimuli is used for acuity estimation...
November 13, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/29134137/pattern-electroretinography-and-visual-evoked-potentials-provide-clinical-evidence-of-cns-modulation-of-high-and-low-contrast-vep-latency-in-glaucoma
#16
William E Sponsel, Susan L Johnson, Rick Trevino, Alberto Gonzalez, Sylvia L Groth, Carolyn Majcher, Diane C Fulton, Matthew A Reilly
Purpose: Both pattern electroretinography (PERG) and visual evoked potentials (VEP) can be performed using low- (15%; Lc) and high- (85%; Hc) contrast gratings that may preferentially stimulate the magno- and parvocellular pathways. We observed that among glaucomatous patients showing only one VEP latency deficit per eye, there appeared to be a very strong tendency for an Hc delay in one eye and an Lc delay in the other. Methods: Diopsys NOVA-LX system was used to measure VEP Hc and Lc latency among a clinical glaucoma population to find all individuals with either a single Hc or Lc latency abnormality in each eye (group 1), or with greater than 0 and less than 4 Hc or Lc VEP latency abnormalities in the two eyes (group 2) to determine whether a significant inverse correlation existed for these values in either group...
2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/29129160/visual-but-not-motor-processes-predict-simple-visuomotor-reaction-time-of-badminton-players
#17
Thorben Hülsdünker, Heiko K Strüder, Andreas Mierau
The athlete's brain exhibits significant functional adaptations that facilitate visuomotor reaction performance. However, it is currently unclear if the same neurophysiological processes that differentiate athletes from non-athletes also determine performance within a homogeneous group of athletes. This information can provide valuable help for athletes and coaches aiming to optimize existing training regimes. Therefore, this study aimed to identify the neurophysiological correlates of visuomotor reaction performance in a group of skilled athletes...
November 12, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29124547/online-reduction-of-artifacts-in-eeg-of-simultaneous-eeg-fmri-using-reference-layer-adaptive-filtering-rlaf
#18
David Steyrl, Gunther Krausz, Karl Koschutnig, Günter Edlinger, Gernot R Müller-Putz
Simultaneous electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) allow us to study the active human brain from two perspectives concurrently. Signal processing based artifact reduction techniques are mandatory for this, however, to obtain reasonable EEG quality in simultaneous EEG-fMRI. Current artifact reduction techniques like average artifact subtraction (AAS), typically become less effective when artifact reduction has to be performed on-the-fly. We thus present and evaluate a new technique to improve EEG quality online...
November 9, 2017: Brain Topography
https://www.readbyqxmd.com/read/29122298/evoked-potential-and-eeg-study-of-the-neurotoxicity-of-hydramethylnon-in-rats
#19
George M Strain
The objective of the study was to assess the neurotoxicity, using electrodiagnostic tests, of hydramethylnon (Amdro, AC 217,300), an insecticide marketed for the treatment of red imported fire ants, cockroaches, and other insects. Animals were male Fisher 344 albino rats and Long-Evans hooded rats. Brainstem auditory, visual, and somatosensory evoked potentials (BAER, VEP, SEP) and electroencephalograms (EEG) were recorded from implanted screw electrodes before and at multiple time points through day 10 after a single oral dose of hydramethylnon (at 50% or 75% of the LD50) plus vehicle, or vehicle alone...
October 31, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/29114213/visually-evoked-visual-auditory-changes-associated-with-auditory-performance-in-children-with-cochlear-implants
#20
Maojin Liang, Junpeng Zhang, Jiahao Liu, Yuebo Chen, Yuexin Cai, Xianjun Wang, Junbo Wang, Xueyuan Zhang, Suijun Chen, Xianghui Li, Ling Chen, Yiqing Zheng
Activation of the auditory cortex by visual stimuli has been reported in deaf children. In cochlear implant (CI) patients, a residual, more intense cortical activation in the frontotemporal areas in response to photo stimuli was found to be positively associated with poor auditory performance. Our study aimed to investigate the mechanism by which visual processing in CI users activates the auditory-associated cortex during the period after cochlear implantation as well as its relation to CI outcomes. Twenty prelingually deaf children with CI were recruited...
2017: Frontiers in Human Neuroscience
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