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https://www.readbyqxmd.com/read/27928382/isolated-fourth-nerve-palsy-in-tuberculous-meningitis
#1
María García-Zamora, Hortensia Sánchez-Tocino, Ana Villanueva-Gómez, José Miguel Angles-Deza, Elena Pérez-Gutierrez
Tuberculous meningitis is a type of subacute meningitis and like other intracranial processes can compromise ocular motor nerves, causing palsies. Trochlear nerve is an unusual isolated manifestation in this type of pathology. The authors report a 5-year-old boy presented in their clinic with a trochlear nerve palsy as unique neurological manifestation of tuberculous meningitis. Treatment with complete anti-tuberculous therapy and botulinum A toxin was needed to get the complete resolution of the nerve palsy...
February 2016: Neuro-ophthalmology
https://www.readbyqxmd.com/read/27903814/blink-associated-contralateral-eccentric-saccades-as-a-rare-sign-of-unilateral-brain-injury
#2
Ilaria Zivi, Eugenio Bertelli, Giacinta Bilotti, Ignazio Alessandro Clemente, Leopold Saltuari, Giuseppe Frazzitta
OBJECTIVE: To describe a rare sign of unilateral brain injury as a form of unwanted blink-associated contralateral eccentric saccades. METHODS: A 62-year-old patient who underwent an ischemic stroke affecting the entire right middle cerebral artery territory came to our attention 1 year after stroke, manifesting with transient contralateral conjugate gaze deviations associated with spontaneous blinking. We complemented the regular neurologic evaluation with brain MRI, study of evoked potentials, electroneurography of the facial nerve, and infrared video-oculoscopy...
November 30, 2016: Neurology
https://www.readbyqxmd.com/read/27899021/does-preoperative-diplopia-determine-the-incidence-of-postoperative-diplopia-after-repair-of-orbital-floor-fracture-an-institutional-review
#3
Avisham Ramphul, Gary Hoffman
PURPOSE: The purpose of our study was to investigate whether the occurrence of preoperative diplopia determines the incidence of postoperative diplopia after orbital floor repair. MATERIALS AND METHODS: We undertook a retrospective cohort study with a review of the records of 126 consecutive patients who had undergone repair of an orbital floor fracture under the maxillofacial surgery service at John Hunter Hospital (Newcastle, NSW, Australia). The primary predictor variables were a number of demographic, etiologic, and operative factors that might influence the occurrence of diplopia...
November 9, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27898724/risk-factors-for-motor-vehicle-collisions-in-patients-with-primary-open-angle-glaucoma-a-multicenter-prospective-cohort-study
#4
Kenya Yuki, Sachiko Awano-Tanabe, Takeshi Ono, Daisuke Shiba, Hiroshi Murata, Ryo Asaoka, Kazuo Tsubota
PURPOSE: To identify the incidence rate of motor vehicle collisions (MVCs) in patients with no ocular pathology other than primary open-angle glaucoma (POAG) and determine the putative risk factors for MVCs in this group of patients. METHODS: We designed a prospective cohort study across three centers utilizing a consecutive sampling method to identify all patients with POAG between the ages of 40 and 80 years old. Patients with glaucoma were consecutively screened for eligibility...
2016: PloS One
https://www.readbyqxmd.com/read/27877114/ontogenetic-development-of-vestibulo-ocular-reflexes-in-amphibians
#5
REVIEW
Francisco Branoner, Boris P Chagnaud, Hans Straka
Vestibulo-ocular reflexes (VOR) ensure gaze stability during locomotion and passively induced head/body movements. In precocial vertebrates such as amphibians, vestibular reflexes are required very early at the onset of locomotor activity. While the formation of inner ears and the assembly of sensory-motor pathways is largely completed soon after hatching, angular and translational/tilt VOR display differential functional onsets and mature with different time courses. Otolith-derived eye movements appear immediately after hatching, whereas the appearance and progressive amelioration of semicircular canal-evoked eye movements is delayed and dependent on the acquisition of sufficiently large semicircular canal diameters...
2016: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/27872811/failure-to-mobilize-cognitive-control-for-challenging-tasks-correlates-with-symptom-severity-in-schizophrenia
#6
Bengi Baran, F Işık Karahanoğlu, Yigal Agam, Leonidas Mantonakis, Dara S Manoach
Deficits in the adaptive, flexible control of behavior contribute to the clinical manifestations of schizophrenia. We used functional MRI and an antisaccade paradigm to examine the neural correlates of cognitive control deficits and their relations to symptom severity. Thirty-three chronic medicated outpatients with schizophrenia and 31 healthy controls performed an antisaccade paradigm. We examined differences in recruitment of the cognitive control network and task performance for Hard (high control) versus Easy (low control) antisaccade trials within and between groups...
2016: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27866068/an-abnormal-ocular-motor-manifestation-of-joubert-syndrome
#7
Jeanie Ling, Viraj Mehta, Anvesh Reddy, Matthew Hollar, Sean Donahue
Joubert syndrome is a congenital neurodevelopmental disorder primarily affecting the midbrain and hindbrain. It is characterized by ataxia, hypotonia, and developmental delay as well as apnea or abnormal ocular motor function. We describe and present a video of a child with Joubert syndrome with an alternating skew deviation in primary position rather than on lateral gaze, which is a more characteristic phenotype of this condition.
November 16, 2016: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/27852021/-neuroanatomy-of-the-parietal-association-areas
#8
Yasushi Kobayashi
The parietal association cortex comprises the superior and inferior parietal lobules, the precuneus and the cortices in the intraparietal, parietooccipital and lunate sulci. By processing somatic, visual, acoustic and vestibular sensory information, the parietal association cortex plays a pivotal role in spatial cognition and motor control of the eyes and the extremities. Sensory information from the primary and secondary somatosensory areas enters the superior parietal lobule and is transferred to the inferior parietal lobule...
November 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27846186/ocular-motor-palsy-after-spinal-puncture
#9
Monica Del-Rio-Vellosillo, José J Garcia-Medina, Maria Dolores Pinazo-Duran, Antonio Abengochea-Cotaina, Manuel Barbera-Alacreu
Ocular motor palsy is a rare but alarming complication of subarachnoid puncture. In order to better understand this condition, a literature search was performed in English of PubMed articles for cranial nerves III, IV, and VI palsies after spinal puncture. Sixty-five articles (dated 1930-2015) were identified, and 114 cases were obtained for analysis. Subarachnoid anesthesia was the most frequent cause (45.6%), with a higher incidence for females than males. The age of patients was 40.24 ± 13.35 years (age range, 6-71 years)...
November 15, 2016: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/27842578/an-autopsy-confirmed-case-of-progressive-supranuclear-palsy-with-predominant-postural-instability
#10
Carolin Kurz, Georg Ebersbach, Gesine Respondek, Armin Giese, Thomas Arzberger, Günter Ulrich Höglinger
Postural instability and supranuclear gaze palsy represent the key symptoms of Richardson's syndrome, the most frequent clinical manifestation of progressive supranuclear palsy (PSP). However, a proportion of PSP patients never develops ocular motor symptoms, which prevents clinicians from establishing the diagnosis during lifetime according to current diagnostic criteria. We present one instructive autopsy-confirmed PSP case with prospective video-documented clinical course, showing striking temporal divergence of initially present postural instability and delayed development of ocular motor dysfunction...
November 14, 2016: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/27834667/validity-and-reliability-of-the-vestibular-ocular-motor-screening-and-associations-with-common-concussion-screening-tools
#11
Amy M Yorke, Laura Smith, Mitch Babcock, Bara Alsalaheen
BACKGROUND: Sustaining a concussion commonly results in vestibular impairments that may be associated with balance deficits. To screen for vestibular impairments after a concussion, the Vestibular/Ocular Motor Screening (VOMS) tool was developed. The relationship between the VOMS and other concussion screening tools, such as the Balance Error Scoring System (BESS) and King-Devick (K-D), have not been explored. HYPOTHESES: (1) VOMS would provide reliable results and not provoke symptoms in healthy adolescents and (2) VOMS test items would measure related aspects of vestibular function that are not measured through the BESS or K-D...
November 10, 2016: Sports Health
https://www.readbyqxmd.com/read/27831838/clinical-radiologic-correlation-of-extraocular-eye-movement-disorders-seeing-beneath-the-surface
#12
Joshua Thatcher, Yu-Ming Chang, Margaret N Chapman, Keegan Hovis, Akifumi Fujita, Rachel Sobel, Osamu Sakai
Extraocular eye movement disorders are relatively common and may be a significant source of discomfort and morbidity for patients. The presence of restricted eye movement can be detected clinically with quick, easily performed, noninvasive maneuvers that assess medial, lateral, upward, and downward gaze. However, detecting the presence of ocular dysmotility may not be sufficient to pinpoint the exact cause of eye restriction. Imaging plays an important role in excluding, in some cases, and detecting, in others, a specific cause responsible for the clinical presentation...
November 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/27824897/functional-plasticity-after-unilateral-vestibular-midbrain-infarction-in-human-positron-emission-tomography
#13
Sandra Becker-Bense, Hans-Georg Buchholz, Bernhard Baier, Mathias Schreckenberger, Peter Bartenstein, Andreas Zwergal, Thomas Brandt, Marianne Dieterich
The aim of the study was to uncover mechanisms of central compensation of vestibular function at brainstem, cerebellar, and cortical levels in patients with acute unilateral midbrain infarctions presenting with an acute vestibular tone imbalance. Eight out of 17 patients with unilateral midbrain infarctions were selected on the basis of signs of a vestibular tone imbalance, e.g., graviceptive (tilts of perceived verticality) and oculomotor dysfunction (skew deviation, ocular torsion) in F18-fluordeoxyglucose (FDG)-PET at two time points: A) in the acute stage, and B) after recovery 6 months later...
2016: PloS One
https://www.readbyqxmd.com/read/27820875/improvement-of-eye-alignment-in-adult-strabismic-monkeys-by-sustained-igf-1-treatment
#14
Linda K McLoon, Stephen P Christiansen, Geoffrey M Ghose, Vallabh E Das, Michael J Mustari
Purpose: The goal of this study was to determine if continuous application of insulin-like growth factor-1 (IGF-1) could improve eye alignment of adult strabismic nonhuman primates and to assess possible mechanisms of effect. Methods: A continuous release pellet of IGF-1 was placed on one medial rectus muscle in two adult nonhuman primates (M1, M2) rendered exotropic by the alternating monocular occlusion method during the first months of life. Eye alignment and eye movements were recorded for 3 months, after which M1 was euthanized, and the lateral and medial rectus muscles were removed for morphometric analysis of fiber size, nerve, and neuromuscular density...
November 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27815703/development-of-an-activity-disease-score-in-patients-with-uveitis-uvedai
#15
Esperanza Pato, Mª Auxiliadora Martin-Martinez, Adela Castelló, Rosalía Méndez-Fernandez, Santiago Muñoz-Fernández, Miguel Cordero-Coma, Lucia Martinez-Costa, Elia Valls, Miguel Reyes, Félix Francisco, Mar Esteban, Alex Fonollosa, Fernando Sanchez-Alonso, Cruz Fernández-Espartero, Teresa Diaz-Valle, José Miguel Carrasco, Emma Beltran-Catalán, Marisa Hernández-Garfella, María Victoria Hernández, Laura Pelegrin, Ricardo Blanco, David Diaz-Valle
To develop a disease activity index for patients with uveitis (UVEDAI) encompassing the relevant domains of disease activity considered important among experts in this field. The steps for designing UVEDAI were: (a) Defining the construct and establishing the domains through a formal judgment of experts, (b) A two-round Delphi study with a panel of 15 experts to determine the relevant items, (c) Selection of items: A logistic regression model was developed that set ocular inflammatory activity as the dependent variable...
November 4, 2016: Rheumatology International
https://www.readbyqxmd.com/read/27815186/strabismus-surgery-outcomes-in-the-infant-aphakia-treatment-study-iats
#16
Erick D Bothun, Michael J Lynn, Stephen P Christiansen, Stacey J Kruger, Deborah K Vanderveen, Dan E Neely, Scott R Lambert
PURPOSE: To report strabismus surgery frequency and outcomes after monocular infantile cataract surgery with or without IOL implantation. METHODS: The Infant Aphakia Treatment Study (IATS) is a randomized, multicenter clinical trial comparing treatment of aphakia with a primary IOL or contact lens in 114 infants with a unilateral congenital cataract. This report is a secondary outcome analysis of ocular motor data from IATS patients who underwent strabismus surgery prior to age 5 years...
November 1, 2016: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/27811525/fixation-stability-and-viewing-distance-in-patients-with-amd
#17
Luminita Tarita-Nistor, Esther G González, Taylor Brin, Mark S Mandelcorn, Anne-Catherine Scherlen, Efrem D Mandelcorn, Martin J Steinbach
PURPOSE: People with normal vision perform activities of daily living binocularly, while changing viewing distance frequently and effortlessly. Typically, in patients with age-related macular degeneration (AMD), fixation stability is recorded with monocular instruments at a fixed viewing distance (i.e. optical infinity) to determine the location and precision of the preferred retinal loci (PRLs)-the part of the functional retina that fulfills the role of a pseudo-fovea. Fixation stability recorded with these instruments has been related to performance on visual tasks at shorter viewing distances, although it is not known how viewing distance affects the precision of ocular motor control in these patients...
November 1, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27789472/a-positive-vestibular-ocular-motor-screening-voms-is-associated-with-increased-recovery-time-after-sports-related-concussion-in-youth-and-adolescent-athletes
#18
Anthony J Anzalone, Damond Blueitt, Tami Case, Tiffany McGuffin, Kalyssa Pollard, J Craig Garrison, Margaret T Jones, Robert Pavur, Stephanie Turner, Jonathan M Oliver
BACKGROUND: Vestibular and ocular motor impairments are routinely reported in patients with sports-related concussion (SRC) and may result in delayed return to play (RTP). The Vestibular/Ocular Motor Screening (VOMS) assessment has been shown to be consistent and sensitive in identifying concussion when used as part of a comprehensive examination. To what extent these impairments or symptoms are associated with length of recovery is unknown. PURPOSE: To examine whether symptom provocation or clinical abnormality in specific domains of the VOMS results in protracted recovery (time from SRC to commencement of RTP protocol)...
October 27, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27763485/wernicke-s-encephalopathy-due-to-hyperemesis-gravidarum-clinical-and-magnetic-resonance-imaging-characteristics
#19
V V Ashraf, J Prijesh, R Praveenkumar, K Saifudheen
Hyperemesis gravidarum-induced Wernicke's encephalopathy (WE) is an underestimated condition. The purpose of this study is to improve its awareness and early diagnosis. We report five cases of WE secondary to hyperemesis gravidarum. Classic triad of encephalopathy, ataxia, and ocular signs was seen in four out of five patients. Two unusual features noted in this series were papilledema in one patient and severe sensory-motor peripheral neuropathy in one patient. Magnetic resonance imaging (MRI) was abnormal in all the five patients, and high signal in medial thalamus and surrounding the aqueduct was the most common abnormality (5/5)...
October 2016: Journal of Postgraduate Medicine
https://www.readbyqxmd.com/read/27761109/saccadic-and-postsaccadic-disconjugacy-in-zebrafish-larvae-suggests-independent-eye-movement-control
#20
Chien-Cheng Chen, Christopher J Bockisch, Dominik Straumann, Melody Ying-Yu Huang
Spontaneous eye movements of zebrafish larvae in the dark consist of centrifugal saccades that move the eyes from a central to an eccentric position and postsaccadic centripetal drifts. In a previous study, we showed that the fitted single-exponential time constants of the postsaccadic drifts are longer in the temporal-to-nasal (T->N) direction than in the nasal-to-temporal (N->T) direction. In the present study, we further report that saccadic peak velocities are higher and saccadic amplitudes are larger in the N->T direction than in the T->N direction...
2016: Frontiers in Systems Neuroscience
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