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https://www.readbyqxmd.com/read/28630792/corneal-collagen-crosslinking-treatment-in-a-case-with-pneumococcal-keratitis
#1
Ayşe Bozkurt Oflaz, Banu Bozkurt, Ümit Kamış, Bengü Ekinci Köktekir
Bacterial keratitis is a serious ocular infectious disease that can threaten vision. The disease generally progresses rapidly and can lead to corneal scar, stromal abscess formation, perforation, and dissemination to adjacent tissues if not treated properly. Recent studies showed that corneal collagen crosslinking (CCC) using ultraviolet-A/riboflavin is effective in the treatment of bacterial keratitis refractory to topical antibiotic treatment. In addition to being bactericidal, CCC also decreases risk of perforation by strengthening the corneal collagen structure...
June 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28623544/clinical-feature-and-waveform-in-infantile-nystagmus-syndrome-in-children-with-frmd7-gene-mutations
#2
Dayong Bai, Wei Shi, Zhan Qi, Wei Li, Aihua Wei, Yanhui Cui, Cheng Li, Li Li
Infant nystagmus sydrome presents as involuntary eye movement disorder and can affect seriously ocular function. We performed a retrospective study of clinical data and FRMD7 genetic test results in 12 cases of infantile nystagmus syndrome to correlate waveform, stereopsis, and visual acuity. The patients (age 6.40±2.67 years) had FRMD7 mutations as follows: missense in eight cases, shear in two cases, frameshift in one case, and non-frameshift in one case. Horizontal jerk waveform was observed in six cases, versus horizontal pendulum in five cases and dual jerk in one case...
June 14, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28622488/dizziness-unsteadiness-visual-disturbances-and-sensorimotor-control-in-traumatic-neck-pain
#3
Julia Treleaven
Synopsis There is considerable evidence to support the importance of cervical afferent dysfunction in the development of dizziness, unsteadiness, visual disturbances and altered balance, eye, and head movement control following neck trauma, especially in those with persistent symptoms. However, there are other possible causes for these symptoms and secondary adaptive changes should also be considered in the process of differential diagnosis. Understanding the nature of these symptoms and the differential diagnosis of their potential origin is important for rehabilitation...
June 16, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28622442/muscular-basis-of-whisker-torsion-in-mice-and-rats
#4
Sebastian Haidarliu, Knarik Bagdasarian, Namrata Shinde, Ehud Ahissar
Whisking mammals move their whiskers in the rostrocaudal and dorsoventral directions with simultaneous rolling about their long axes (torsion). Whereas muscular control of the first two types of whisker movement was already established, the anatomic muscular substrate of the whisker torsion remains unclear. Specifically, it was not clear whether torsion is induced by asymmetrical operation of known muscles or by other largely unknown muscles. Here we report that mystacial pads of newborn and adult rats and mice contain oblique intrinsic muscles (OMs) that connect diagonally adjacent vibrissa follicles...
June 16, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28620341/the-intersection-between-ocular-and-manual-motor-control-eye-hand-coordination-in-acquired-brain-injury
#5
REVIEW
John-Ross Rizzo, Maryam Hosseini, Eric A Wong, Wayne E Mackey, James K Fung, Edmond Ahdoot, Janet C Rucker, Preeti Raghavan, Michael S Landy, Todd E Hudson
Acute and chronic disease processes that lead to cerebral injury can often be clinically challenging diagnostically, prognostically, and therapeutically. Neurodegenerative processes are one such elusive diagnostic group, given their often diffuse and indolent nature, creating difficulties in pinpointing specific structural abnormalities that relate to functional limitations. A number of studies in recent years have focused on eye-hand coordination (EHC) in the setting of acquired brain injury (ABI), highlighting the important set of interconnected functions of the eye and hand and their relevance in neurological conditions...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28593438/eye-movements-are-correctly-timed-during-walking-despite-bilateral-vestibular-hypofunction
#6
Eric R Anson, Tim Kiemel, John P Carey, John J Jeka
Individuals with bilateral vestibular hypofunction (BVH) often report symptoms of oscillopsia (the perception that the world is bouncing or unstable) during walking. Efference copy/proprioception contributes to locomotion gaze stability in animals, sometimes inhibiting the vestibulo-ocular reflex (VOR). Gaze stability requires both adequate eye velocity and appropriate timing of eye movements. It is unknown whether eye velocity (VOR gain), timing (phase), or both are impaired for individuals with BVH during walking...
June 7, 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28586131/mechanisms-underlying-vestibulo-cerebellar-motor-learning-in-mice-depend-on-movement-direction
#7
Kai Voges, Bin Wu, Laura Post, Martijn Schonewille, Chris I De Zeeuw
Compensatory eye movements elicited by head rotation, also known as vestibulo-ocular reflex (VOR), can be adapted with the use of visual feedback. The cerebellum is essential for this type of movement adaptation, but its neuronal correlates remain to be elucidated. Here we show that the direction of vestibular input determines the magnitude of eye movement adaptation induced by mismatched visual input in mice, with larger changes during contraversive head rotation. Moreover, the location of the neural correlate of this changed behaviour depends on the type of paradigm...
June 6, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28579056/-computerized-oculomotor-training-in-dyslexia-a-randomized-crossover-clinical-trial-in-pediatric-population
#8
H Peyre, C-L Gérard, I Dupong Vanderhorst, S Larger, C Lemoussu, J Vesta, E Bui Quoc, N Gouleme, R Delorme, M P Bucci
OBJECTIVE: Several studies have reported abnormal oculomotor capacities leading to reading/writing difficulties among dyslexic children. However, no randomized clinical trial has been conducted to determine whether oculomotor training improves reading/writing skills of these children. The present study aims to evaluate the efficacy of computer-based oculomotor training among dyslexic children. METHOD: Crossover randomized trial with enrollment from January 12, 2015 to July 24, 2015, and follow-up to February 4, 2016...
June 1, 2017: L'Encéphale
https://www.readbyqxmd.com/read/28560493/three-dimensional-analysis-of-linear-vestibulo-ocular-reflex-in-humans-during-eccentric-rotation-while-facing-downwards
#9
Takao Imai, Yasumitsu Takimoto, Noriaki Takeda, Tomoko Okumura, Hidenori Inohara
When participants undergo eccentric rotation (ER), i.e., they are rotated while displaced from the axis of rotation, they undergo both rotational stimulation and linear acceleration, which induces both the angular vestibulo-ocular reflex (aVOR) and linear VOR (lVOR). During ER, the lVOR induced by tangential linear acceleration enhances the eye movement induced by aVOR. In this study, we attempted to measure aVOR and lVOR separately, while participants underwent ER while facing the ground in a dark room. We analyzed three-dimensional eye movements using a video-oculography system...
May 30, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28554534/ophthalmic-manifestations-of-xeroderma-pigmentosum-a-perspective-from-the-united-kingdom
#10
Rongxuan Lim, Mieran Sethi, Ana M S Morley
PURPOSE: To document the ocular manifestations of xeroderma pigmentosum (XP), presenting via the United Kingdom (UK) XP service, and to analyze the correlations between XP genotype and ophthalmic phenotype. DESIGN: Prospective observational case series. SUBJECTS: Eighty-nine patients seen by the UK Nationally Commissioned XP Service, from April 2010 to December 2014, with a genetically confirmed diagnosis of XP. METHODS: Patients underwent a full ophthalmic examination at each visit...
May 26, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28553580/fast-and-efficient-four%C3%A2-class-motor-imagery-electroencephalography-signal-analysis-using-common-spatial-pattern-ridge-regression-algorithm-for-the-purpose-of-brain-computer-interface
#11
Sahar Seifzadeh, Mohammad Rezaei, Karim Faez, Mahmood Amiri
Brain-computer interfaces enable users to control devices with electroencephalographic (EEG) activity from the scalp or with single-neuron activity from within the brain. One of the most challenging issues in this regard is the balance between the accuracy of brain signals from patients and the speed of interpreting them into machine language. The main objective of this paper is to analyze different approaches to achieve the balance more quickly and in a better way. To reduce the ocular artifacts, the symmetric prewhitening independent component analysis (ICA) algorithm has been evaluated, which has the lowest runtime and lowest signal-to-interference (SIR) index, without destroying the original signal...
April 2017: Journal of Medical Signals and Sensors
https://www.readbyqxmd.com/read/28553394/parainfectious-ocular-flutter-and-truncal-ataxia-in-association-with-dengue-fever
#12
Rohan R Mahale, Anish Mehta, Kiran Buddaraju, Rangasetty Srinivasa
Ocular flutter is an eye movement disorder characterized by purely horizontal rapid saccadic oscillations lasting for a few minutes which stops spontaneously. Postinfectious ocular flutter and truncal ataxia are a rare entity. There are reported cases of opsoclonus myoclonus ataxia in association with dengue virus infection. However, there are no reported cases of parainfectious ocular flutter and truncal ataxia in association with dengue virus infection. Hereby, we report a child with dengue fever who had ocular flutter and truncal ataxia...
January 2017: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28552035/novel-pnkp-mutation-in-siblings-with-ataxia-oculomotor-apraxia-type-4
#13
Nicoline Schiess, David S Zee, Khurram A Siddiqui, Miklos Szolics, Ayman W El-Hattab
The phenotypic and genetic spectrum of ataxia with oculomotor apraxia (AOA) disorders is rapidly evolving and new technologies such as genetic mapping using whole exome sequencing reveal subtle distinctions among the various subtypes. We report a novel PNKP mutation in two siblings with progressive ataxia, abnormal saccades, sensorimotor neuropathy and dystonia consistent with the AOA type 4 phenotype. Laboratory evaluation revealed hypoalbuminemia, hypercholesterolemia with elevated LDL, elevated IgE levels and normal α fetoprotein levels...
March 2017: Journal of Neurogenetics
https://www.readbyqxmd.com/read/28538993/fefsem-neuronal-response-during-combined-volitional-and-reflexive-pursuit
#14
Leah Bakst, Jérome Fleuriet, Michael J Mustari
Although much is known about volitional and reflexive smooth eye movements individually, much less is known about how they are coordinated. It is hypothesized that separate cortico-ponto-cerebellar loops subserve these different types of smooth eye movements. Specifically, the MT-MST-DLPN pathway is thought to be critical for ocular following eye movements, whereas the FEF-NRTP pathway is understood to be vital for volitional smooth pursuit. However, the role that these loops play in combined volitional and reflexive behavior is unknown...
May 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28515977/establishing-normative-change-values-in-visual-acuity-loss-during-the-dynamic-visual-acuity-test
#15
Chris Marquez, Monica Lininger, Scot Raab
BACKGROUND: Baseline visual acuity (VA) loss from static to dynamic head conditions assessed using the Dynamic Visual Acuity Testing (DVAT) have not been established in NCAA football players. DVAT assesses the Vestibulo-Ocular Reflex (VOR) which is measured in Logarithm of the Minimum Angle of Resolution (logMAR). Decreased VA beyond baseline measures may detect VOR impairment and impact treatment protocols and assist in return to play decisions post-concussion. HYPOTHESIS/PURPOSE: To establish normative VA mean scores during a static head posture as well as dynamically during the DVAT with a head speed of 150 deg/s in the pitch (vertical) and yaw (horizontal) planes rotating 20 degrees in each direction...
April 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28515637/ultrasound-biomicroscopy-value-in-evaluation-of-restoration-of-ciliary-muscles-contractility-after-cataract-extraction
#16
Ayser Abd El-Hameed Fayed
PURPOSE: To assess the changes in the contractility of the ciliary muscle in eyes with presbyopia before and after phacoemulsification and intracapsular lens implantation using ultrasound biomicroscopy (UBM). PATIENTS AND METHODS: This prospective study included 50 eyes of 30 consecutive subjects operated at the Department of Ophthalmology. Patients with any ocular disorder affecting visual acuity, corneal surface irregularities, had posterior capsular perforation or intensive postoperative corneal edema, or were <35 years of age, were excluded...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28500752/which-ante-mortem-clinical-features-predict-progressive-supranuclear-palsy-pathology
#17
Gesine Respondek, Carolin Kurz, Thomas Arzberger, Yaroslau Compta, Elisabet Englund, Leslie W Ferguson, Ellen Gelpi, Armin Giese, David J Irwin, Wassilios G Meissner, Christer Nilsson, Alexander Pantelyat, Alex Rajput, John C van Swieten, Claire Troakes, Keith A Josephs, Anthony E Lang, Brit Mollenhauer, Ulrich Müller, Jennifer L Whitwell, Angelo Antonini, Kailash P Bhatia, Yvette Bordelon, Jean-Christophe Corvol, Carlo Colosimo, Richard Dodel, Murray Grossman, Jan Kassubek, Florian Krismer, Johannes Levin, Stefan Lorenzl, Huw Morris, Peter Nestor, Wolfgang H Oertel, Gil D Rabinovici, James B Rowe, Thilo van Eimeren, Gregor K Wenning, Adam Boxer, Lawrence I Golbe, Irene Litvan, Maria Stamelou, Günter U Höglinger
BACKGROUND: Progressive supranuclear palsy (PSP) is a neuropathologically defined disease presenting with a broad spectrum of clinical phenotypes. OBJECTIVE: To identify clinical features and investigations that predict or exclude PSP pathology during life, aiming at an optimization of the clinical diagnostic criteria for PSP. METHODS: We performed a systematic review of the literature published since 1996 to identify clinical features and investigations that may predict or exclude PSP pathology...
May 13, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28495637/veridical-stimulus-localization-is-linked-to-human-area-v5-mt-activity
#18
Anna K Bonkhoff, Eckart Zimmermann, Gereon R Fink
How the brain represents visual space is an unsolved mystery. Spatial localization becomes particularly challenging when visual information processing is briefly disrupted, as in the case of saccadic eye movements, blinks, or visual masks. As we have recently reported, a compression of visual space, illustrated by displacements of shortly flashed stimuli, can be observed in the temporal vicinity of masking stimuli during ocular fixation (Zimmermann et al., 2013). We here aimed at investigating the neural mechanisms underlying these displacements using functional magnetic resonance imaging...
May 8, 2017: NeuroImage
https://www.readbyqxmd.com/read/28492464/validity-of-forced-eyelid-closure-test-a-novel-clinical-screening-test-for-ocular-myasthenia-gravis
#19
Supanut Apinyawasisuk, Xinkai Zhou, Jack J Tian, Giancarlo A Garcia, Rustum Karanjia, Alfredo A Sadun
BACKGROUND: Forced eyelid closure test (FECT) is a clinical screening test developed from the original Cogan lid twitch (CLT) sign to assist in the diagnosis of ocular myasthenia gravis (OMG), We evaluated the sensitivity and specificity of FECT compared with CLT and benchmarked to standard diagnostic tests. METHODS: This study was a retrospective chart review of 48 patients using electronic medical records of those that presented with ptosis and/or diplopia at Doheny Eye Institute, University of California, Los Angeles between February 2015 and April 2016...
May 10, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28471705/individualized-management-of-facial-synkinesis-based-on-facial-function
#20
Cecilia Montalban Maria, Jin Kim
OBJECTIVES: The researchers analyzed facial patterns in subjects with facial synkinesis after facial paralysis and evaluated the involved muscles to aid in the development of effective treatments for facial synkinesis. METHODS: A total of 142 subjects were included in the study, the primary measure for synkinesis was determined by video analysis involving the strongest combination of two muscle groups that contributed to facial expression. The secondary measure of synkinesis was the analysis of its severity using the SB grading system, while observing the number of facial synkinetic movements...
May 4, 2017: Acta Oto-laryngologica
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