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https://www.readbyqxmd.com/read/28102741/tutorial-on-biostatistics-linear-regression-analysis-of-continuous-correlated-eye-data
#1
Gui-Shuang Ying, Maureen G Maguire, Robert Glynn, Bernard Rosner
PURPOSE: To describe and demonstrate appropriate linear regression methods for analyzing correlated continuous eye data. METHODS: We describe several approaches to regression analysis involving both eyes, including mixed effects and marginal models under various covariance structures to account for inter-eye correlation. We demonstrate, with SAS statistical software, applications in a study comparing baseline refractive error between one eye with choroidal neovascularization (CNV) and the unaffected fellow eye, and in a study determining factors associated with visual field in the elderly...
January 19, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28100483/electrophysiological-changes-in-12-year-old-children-born-mlp-reduced-vep-amplitude-in-mlp-children
#2
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/28095478/evaluating-silent-reading-performance-with-an-eye-tracking-system-in-patients-with-glaucoma
#3
Noriaki Murata, Daiki Miyamoto, Tetsuya Togano, Takeo Fukuchi
OBJECTIVE: To investigate the relationship between silent reading performance and visual field defects in patients with glaucoma using an eye tracking system. METHODS: Fifty glaucoma patients (Group G; mean age, 52.2 years, standard deviation: 11.4 years) and 20 normal controls (Group N; mean age, 46.9 years; standard deviation: 17.2 years) were included in the study. All participants in Group G had early to advanced glaucomatous visual field defects but better than 20/20 visual acuity in both eyes...
2017: PloS One
https://www.readbyqxmd.com/read/28072615/retinal-detachment-associated-with-peripapillary-staphyloma-imaged-with-swept-source-optical-coherence-tomography
#4
Daisuke Kunita, Makoto Inoue, Takashi Koto, Akito Hirakata
PURPOSE: To examine a rhegmatogenous retinal detachment (RRD) associated with a peripapillary staphyloma with swept source optical coherence tomography (SS-OCT) before and after vitrectomy and circumferential photocoagulation. METHODS: The SS-OCT images including the montage images of two patients with a RRD associated with peripapillary staphylomas were analyzed. A 34-year-old woman (Case 1) and a 70-year-old woman (Case 2) both noticed temporal visual field defects in their left eyes...
January 9, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28067595/the-bilateral-field-advantage-effect-in-memory-precision
#5
Yin Zhang, Chaoxiong Ye, Debi Roberson, Guang Zhao, Chengbo Xue, Qiang Liu
Previous research has demonstrated that visual working memory performance is better when visual items are allocated in both left and right visual fields compared to within only one hemifield. This phenomenon is called the bilateral field advantage (BFA). The BFA is thought to be driven by an enhanced probability of storage, rather than by greater precision. In the present experiments, we sought to test whether the BFA can also extend to precision when the parameters of the task are modified. Using a moderate number of to-be-remembered items and 400 ms presentation time, we found better precision in the bilateral condition compared to the unilateral condition...
January 9, 2017: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/28063992/cross-modal-influences-on-attentional-asymmetries-additive-effects-of-attentional-orienting-and-arousal
#6
Nicole A Thomas, Alexander J Barone, Alexandra H Flew, Michael E R Nicholls
Attention is asymmetrically distributed across the visual field, such that left side stimuli are more salient, which causes a spatial bias known as pseudoneglect. Although auditory cues can be used to direct visual attention to a location, the influence of auditory distractors on visuospatial asymmetries remains unknown. We examined whether attentional orienting or arousal effects occur when either left or right auditory distractors are presented during the landmark task. We also categorised participants based on the baseline direction of pseudoneglect...
January 5, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28059864/a-giant-tumefactive-virshow-robin-space-a-rare-cause-of-a-homonymous-quadrantanopia
#7
Alysse Rivet, Anne-Sophie Gauthier, Marion Chatain, Romain Billon-Grand, Laurent Thines, Bernard Delbosc
A 53-year-old woman was found to have a left inferior homonymous quadrantanopia. Brain MRI disclosed a giant Virchow-Robin space compressing the right optic tract. After fenestration of this cystic lesion, most of the visual field loss resolved. Giant Virchow-Robin spaces may cause homonymous field defects which, with appropriate management, may improve.
January 4, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28058169/idiopathic-isolated-cilioretinal-artery-occlusion-treated-with-hyperbaric-oxygen-therapy
#8
Serdar Aktaş, Osman Murat Uyar, Erol Özer, Hatice Aktaş, Kadir Eltutar
Cilioretinal artery occlusion (CLRAO) is a rare event which has been reported in association with various systemic diseases. We report a case of idiopathic isolated CLRAO treated successfully with hyperbaric oxygen (HBO) therapy. A 26-year-old man presented with sudden, painless vision loss and an inferior hemivisual field defect in the left eye. Fundus fluorescein angiography revealed an occluded cilioretinal artery. After 2 weeks of HBO therapy, visual acuity improved from 20/200 to 20/20. The visual field defect improved...
October 2016: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28056120/clinical-characterization-of-cngb1-related-autosomal-recessive-retinitis-pigmentosa
#9
Sarah Hull, Marcella Attanasio, Gavin Arno, Keren Carss, Anthony G Robson, Dorothy A Thompson, Vincent Plagnol, Michel Michaelides, Graham E Holder, Robert H Henderson, F Lucy Raymond, Anthony T Moore, Andrew R Webster
Importance: There are limited published data on the phenotype of retinitis pigmentosa (RP) related to CNGB1 variants. These data are needed both for prognostic counseling of patients and for understanding potential treatment windows. Objective: To describe the detailed clinical and molecular genetic findings in a series of patients with RP with likely pathogenic variants in CNGB1. Design, Setting, and Participants: In this case series, 10 patients from 9 families underwent full ophthalmologic examination...
January 5, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28052456/frontoparietal-activation-during-visual-conjunction-search-effects-of-bottom-up-guidance-and-adult-age
#10
David J Madden, Emily L Parks, Catherine W Tallman, Maria A Boylan, David A Hoagey, Sally B Cocjin, Micah A Johnson, Ying-Hui Chou, Guy G Potter, Nan-Kuei Chen, Lauren E Packard, Rachel E Siciliano, Zachary A Monge, Michele T Diaz
We conducted functional magnetic resonance imaging (fMRI) with a visual search paradigm to test the hypothesis that aging is associated with increased frontoparietal involvement in both target detection and bottom-up attentional guidance (featural salience). Participants were 68 healthy adults, distributed continuously across 19 to 78 years of age. Frontoparietal regions of interest (ROIs) were defined from resting-state scans obtained prior to task-related fMRI. The search target was defined by a conjunction of color and orientation...
January 4, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28046937/th-cd-207a-02-implementation-of-live-epid-based-inspiration-level-assessment-leila-for-deepinspiration-breath-hold-dibh-monitoring-using-mv-fluoroscopy
#11
J Lehmann, J Sun, M Doebrich, B Zwan, T Fuangrod, S Bhatia, P Greer
PURPOSE: As prior work has shown that current DIBH monitoring approaches using surrogate measures (marker block on chest) do not always correspond with the clinical quantity of interest (lung depth, LD), a software tool and workflow are introduced to use MV fluoroscopy during treatment for real-time / Live EPID-based Inspiration Level Assessment (LEILA). METHODS: A prototype software tool calculates and displays the LD during the treatment of left sided breast cancer...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28039596/optic-neuritis-secondary-to-antiandrogen-therapy
#12
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/28029722/taste-function-assessed-by-electrogustometry-in-burning-mouth-syndrome-a-case-control-study
#13
Adeline Braud, Vianney Descroix, Marie-Noëlle Ungeheuer, Catherine Rougeot, Yves Boucher
OBJECTIVE: Idiopathic Burning mouth syndrome (iBMS) is characterized by oral persistent pain without any clinical or biological abnormality. The aim of the present study was to evaluate taste function in iBMS subjects and healthy controls. MATERIAL AND METHODS: Electrogustometric thresholds (EGMt) were recorded in 21 iBMS patients and 21 paired matched controls at nine loci of the tongue assessing fungiform and foliate gustatory papillae function. Comparison of EGMt was performed using the non-parametric Wilcoxon signed-rank test...
December 28, 2016: Oral Diseases
https://www.readbyqxmd.com/read/28029593/pulse-width-affects-scalp-sensation-of-transcranial-magnetic-stimulation
#14
Angel V Peterchev, Bruce Luber, Gregory G Westin, Sarah H Lisanby
BACKGROUND: Scalp sensation and pain comprise the most common side effect of transcranial magnetic stimulation (TMS), which can reduce tolerability and complicate experimental blinding. OBJECTIVE: We explored whether changing the width of single TMS pulses affects the quality and tolerability of the resultant somatic sensation. METHODS: Using a controllable pulse parameter TMS device with a figure-8 coil, single monophasic magnetic pulses inducing electric field with initial phase width of 30, 60, and 120 µs were delivered in 23 healthy volunteers...
January 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28018245/lateralization-of-eye-use-in-cuttlefish-opposite-direction-for-anti-predatory-and-predatory-behaviors
#15
Alexandra K Schnell, Roger T Hanlon, Aïcha Benkada, Christelle Jozet-Alves
Vertebrates with laterally placed eyes typically exhibit preferential eye use for ecological activities such as scanning for predators or prey. Processing visual information predominately through the left or right visual field has been associated with specialized function of the left and right brain. Lateralized vertebrates often share a general pattern of lateralized brain function at the population level, whereby the left hemisphere controls routine behaviors and the right hemisphere controls emergency responses...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/28017921/hemifield-columns-co-opt-ocular-dominance-column-structure-in-human-achiasma
#16
Cheryl A Olman, Pinglei Bao, Stephen A Engel, Andrea N Grant, Chris Purington, Cheng Qiu, Michael-Paul Schallmo, Bosco S Tjan
In the absence of an optic chiasm, visual input to the right eye is represented in primary visual cortex (V1) in the right hemisphere, while visual input to the left eye activates V1 in the left hemisphere. Retinotopic mapping In V1 reveals that in each hemisphere left and right visual hemifield representations are overlaid (Hoffmann et al., 2012). To explain how overlapping hemifield representations in V1 do not impair vision, we tested the hypothesis that visual projections from nasal and temporal retina create interdigitated left and right visual hemifield representations in V1, similar to the ocular dominance columns observed in neurotypical subjects (Victor et al...
December 23, 2016: NeuroImage
https://www.readbyqxmd.com/read/28013233/the-influence-of-alertness-on-the-spatial-deployment-of-visual-attention-is-mediated-by-the-excitability-of-the-posterior-parietal-cortices
#17
Rebecca E Paladini, René M Müri, Jurka Meichtry, Tobias Nef, Fred W Mast, Urs P Mosimann, Thomas Nyffeler, Dario Cazzoli
With a reduced level of alertness, healthy individuals typically show a rightward shift when deploying visual attention in space. The impact of alertness on the neural networks governing visuospatial attention is, however, poorly understood. By using a transcranial magnetic stimulation twin-coil approach, the present study aimed at investigating the effects of an alertness manipulation on the excitability of the left and the right posterior parietal cortices (PPCs), crucial nodes of the visuospatial attentional network...
December 23, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/28008078/an-evil-face-verbal-evaluative-multi-cs-conditioning-enhances-face-evoked-mid-latency-magnetoencephalographic-responses
#18
Markus Junghöfer, Maimu Alissa Rehbein, Julius Maitzen, Sebastian Schindler, Johanna Kissler
Humans have a remarkable capacity for rapid affective learning. For instance, using first-order US such as odors or electric shocks, magnetoencephalography (MEG) studies of multi-CS conditioning demonstrate enhanced early (<150 ms) and mid-latency (150-300 ms) visual evoked responses to affectively conditioned faces, together with changes in stimulus evaluation. However, particularly in social contexts, human affective learning is often mediated by language, a class of complex higher-order US. To elucidate mechanisms of this type of learning, we investigate how face processing changes following verbal evaluative multi-CS conditioning...
December 21, 2016: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/27997277/opposite-brain-laterality-in-analogous-auditory-and-visual-tests
#19
Leif Oltedal, Kenneth Hugdahl
Laterality for language processing can be assessed by auditory and visual tasks. Typically, a right ear/right visual half-field (VHF) advantage is observed, reflecting left-hemispheric lateralization for language. Historically, auditory tasks have shown more consistent and reliable results when compared to VHF tasks. While few studies have compared analogous tasks applied to both sensory modalities for the same participants, one such study by Voyer and Boudreau [(2003). Cross-modal correlation of auditory and visual language laterality tasks: a serendipitous finding...
December 20, 2016: Laterality
https://www.readbyqxmd.com/read/27992300/identification-of-the-lymphatic-drainage-pattern-of-esophageal-cancer-with-near-infrared-fluorescent-imaging
#20
Francisco Schlottmann, Arianna Barbetta, Benedetto Mungo, Anne O Lidor, Daniela Molena
OBJECTIVE: Nodal status is one of the most important long-term prognostic factors for esophageal cancer. The aim of this study was to evaluate the ability of near-infrared (NIR) light fluorescent imaging to identify the lymphatic drainage pattern of esophageal cancer. METHODS: Patients with distal esophageal cancer or esophagogastric junction cancer scheduled for esophagectomy were enrolled in this study. Before surgery, an endoscopy was performed with submucosal injection of 2 cc of indocyanine green (ICG) around the tumor...
December 19, 2016: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
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