keyword
MENU ▼
Read by QxMD icon Read
search

pupil dilation

keyword
https://www.readbyqxmd.com/read/27903013/isoflurane-associated-mydriasis-mimicking-blown-pupils-in-a-patient-treated-in-a-neurointensive-care-unit
#1
Eva Magdalena Korf, Volker Martin Tronnier, Jan Gliemroth, Jan Nils Küchler
We report a misinterpretation of bilateral mydriasis as blown pupils related to elevated intracranial pressure (ICP) under volatile sedation with isoflurane (Anesthetic Conserving Device [AnaConDa], Hudson RCI, Uppland Vasby, Sweden) in a 59-year-old patient with a severe traumatic brain injury with frontal contusion. The patient showed bilateral mydriasis and a missing light reflex 8 hours after changing sedation from intravenous treatment with midazolam and esketamine to volatile administration of isoflurane...
November 30, 2016: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/27898446/topical-atropine-in-the-control-of-myopia
#2
Donald Tan, Su Ann Tay, Kai-Lyn Loh, Audrey Chia
Efforts to reduce myopia progression in childhood are driven by the increasing incidence of high myopia and its attendant health risks. Interventional approaches to reduce myopia progression in childhood have included the use of spectacles, contact lens, and pharmacological methods, of which the latter appear to be most promising. We review the use of topical atropine eye drops in the retardation of myopia progression in children and discuss the efficacy and safety profiles when used at different concentrations (1...
November 2016: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/27875082/effects-of-trazodone-on-behavioral-signs-of-stress-in-hospitalized-dogs
#3
Shana E Gilbert-Gregory, Jason W Stull, Mary Rose Rice, Meghan E Herron
OBJECTIVE To determine the effects of trazodone treatment on behavioral signs of stress in hospitalized dogs. DESIGN Prospective observational study. ANIMALS 120 client-owned dogs. PROCEDURES Hospitalized dogs administered trazodone (n = 60) were observed for stress-related signs or behaviors ≤ 45 minutes after the drug was administered (time 1) and approximately 90 minutes later (time 2). Dogs that did not receive trazodone (n = 60) were selected to serve as controls for environmental stimuli that could affect behavior and were observed at the same times...
December 1, 2016: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/27866954/the-enright-phenomenon-stereoscopic-distortion-of-perceived-driving-speed-induced-by-monocular-pupil-dilation
#4
Andrew Carkeet, Joanne M Wood, Kylie M McNeill, Hamish J McNeill, Joanna A James, Leigh S Holder
PURPOSE: The Enright phenomenon describes the distortion in speed perception experienced by an observer looking sideways from a moving vehicle when viewing with interocular differences in retinal image brightness, usually induced by neutral density filters. We investigated whether the Enright phenomenon could be induced with monocular pupil dilation using tropicamide. METHODS: We tested 17 visually normal young adults on a closed road driving circuit. Participants were asked to travel at Goal Speeds of 40km/h and 60km/h while looking sideways from the vehicle with: (i) both eyes with undilated pupils; (ii) both eyes with dilated pupils; (iii) with the leading eye only dilated; and (iv) the trailing eye only dilated...
November 17, 2016: Journal of Optometry
https://www.readbyqxmd.com/read/27858578/severe-cerebral-edema-following-nivolumab-treatment-for-pediatric-glioblastoma-case-report
#5
Xiao Zhu, Michael M McDowell, William C Newman, Gary E Mason, Stephanie Greene, Mandeep S Tamber
Nivolumab is an immune checkpoint inhibitor (ICI) currently undergoing Phase III clinical trials for the treatment of glioblastoma. The authors present the case of a 10-year-old girl with glioblastoma treated with nivolumab under compassionate-use guidelines. After the first dose of nivolumab the patient developed hemiparesis, cerebral edema, and significant midline shift due to severe tumor necrosis. She was managed using intravenous dexamethasone and discharged on a dexamethasone taper. The patient's condition rapidly deteriorated after the second dose of nivolumab, demonstrating hemiplegia, seizures, and eventually unresponsiveness with a fixed and dilated left pupil...
November 18, 2016: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/27855175/reappraisal-and-distraction-emotion-regulation-strategies-are-associated-with-distinct-patterns-of-visual-attention-and-differing-levels-of-cognitive-demand
#6
Gregory P Strauss, Kathryn L Ossenfort, Kayla M Whearty
Multiple emotion regulation strategies have been identified and found to differ in their effectiveness at decreasing negative emotions. One reason for this might be that individual strategies are associated with differing levels of cognitive demand and require distinct patterns of visual attention to achieve their effects. In the current study, we tested this hypothesis in a sample of psychiatrically healthy participants (n = 25) who attempted to down-regulate negative emotion to photographs from the International Affective Picture System using cognitive reappraisal or distraction...
2016: PloS One
https://www.readbyqxmd.com/read/27847470/pupil-dynamics-reflect-behavioral-choice-and-learning-in-a-go-nogo-tactile-decision-making-task-in-mice
#7
Christian R Lee, David J Margolis
The eye's pupil undergoes dynamic changes in diameter associated with cognitive effort, motor activity and emotional state, and can be used to index brain state across mammalian species. Recent studies in head-fixed mice have linked arousal-related pupil dynamics with global neural activity as well as the activity of specific neuronal populations. However, it has remained unclear how pupil dynamics in mice report trial-by-trial performance of behavioral tasks, and change on a longer time scale with learning...
2016: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/27843854/clinical-study-of-fundus-findings-in-pregnancy-induced-hypertension
#8
Rahul Navinchandra Bakhda
BACKGROUND AND OBJECTIVES: To study the role of ophthalmoscopy in pregnancy induced hypertension (PIH) in diagnosis, prognosis, differential diagnosis, line of treatment and effect of treatment. MATERIALS AND METHODS: An observational study in which all the patients for the study are selected from antenatal clinic, antenatal wards and preeclampsia and eclampsia room in Department of Obstetrics and Gynecology, General Ophthalmic Out Patient Department (OPD) in case of ambulatory patients, during the period of Nov...
April 2016: Journal of Family Medicine and Primary Care
https://www.readbyqxmd.com/read/27824036/pupil-fluctuations-track-rapid-changes-in-adrenergic-and-cholinergic-activity-in-cortex
#9
Jacob Reimer, Matthew J McGinley, Yang Liu, Charles Rodenkirch, Qi Wang, David A McCormick, Andreas S Tolias
Rapid variations in cortical state during wakefulness have a strong influence on neural and behavioural responses and are tightly coupled to changes in pupil size across species. However, the physiological processes linking cortical state and pupil variations are largely unknown. Here we demonstrate that these rapid variations, during both quiet waking and locomotion, are highly correlated with fluctuations in the activity of corticopetal noradrenergic and cholinergic projections. Rapid dilations of the pupil are tightly associated with phasic activity in noradrenergic axons, whereas longer-lasting dilations of the pupil, such as during locomotion, are accompanied by sustained activity in cholinergic axons...
November 8, 2016: Nature Communications
https://www.readbyqxmd.com/read/27821254/the-relationship-between-baseline-pupil-size-and-intelligence
#10
Jason S Tsukahara, Tyler L Harrison, Randall W Engle
Pupil dilations of the eye are known to correspond to central cognitive processes. However, the relationship between pupil size and individual differences in cognitive ability is not as well studied. A peculiar finding that has cropped up in this research is that those high on cognitive ability have a larger pupil size, even during a passive baseline condition. Yet these findings were incidental and lacked a clear explanation. Therefore, in the present series of studies we systematically investigated whether pupil size during a passive baseline is associated with individual differences in working memory capacity and fluid intelligence...
November 4, 2016: Cognitive Psychology
https://www.readbyqxmd.com/read/27816784/pupillary-response-indexes-the-metrical-hierarchy-of-unattended-rhythmic-violations
#11
Atser Damsma, Hedderik van Rijn
The perception of music is a complex interaction between what we hear and our interpretation. This is reflected in beat perception, in which a listener infers a regular pulse from a musical rhythm. Although beat perception is a fundamental human ability, it is still unknown whether attention to the music is necessary to establish the perception of stronger and weaker beats, or meter. In addition, to what extent beat perception is dependent on musical expertise is still a matter of debate. Here, we address these questions by measuring the pupillary response to omissions at different metrical positions in drum rhythms, while participants attended to another task...
November 2, 2016: Brain and Cognition
https://www.readbyqxmd.com/read/27800601/children-s-intrinsic-motivation-to-provide-help-themselves-after-accidentally-harming-others
#12
Robert Hepach, Amrisha Vaish, Michael Tomasello
Little is known about the flexibility of children's prosocial motivation. Here, 2- and 3-year-old children's (n = 128) internal arousal, as measured via changes in pupil dilation, was increased after they accidentally harmed a victim but were unable to repair the harm. If they were able to repair (or if they themselves did not cause the harm and the help was provided by someone else) their arousal subsided. This suggests that children are especially motivated to help those whom they have harmed, perhaps out of a sense of guilt and a desire to reconcile with them...
November 1, 2016: Child Development
https://www.readbyqxmd.com/read/27799585/a-clinical-randomized-trial-comparing-the-cycloplegic-effect-of-cyclopentolate-drops-applied-to-closed-eyelids-versus-open-eyelids
#13
Jocelyn Zurevinsky, Kallie Sawchuk, Hyun J Lim, Chel Hee Lee, Shehla Rubab
BACKGROUND AND PURPOSE: Adequate cycloplegia and dilation are required for refraction and fundus exam in children. Standard practice is to instill cycloplegic drops in the inferior cul-de-sac, and this is often traumatic for children. Our study assesses the use of cyclopentolate on closed lids as a method of instillation for ensuring complete cycloplegia. PATIENTS AND METHOD: Ninety children presenting for annual refraction were enrolled. Three were excluded as they did not finish the testing...
January 2016: American Orthoptic Journal
https://www.readbyqxmd.com/read/27796779/clinical-components-of-telemedicine-programs-for-diabetic-retinopathy
#14
REVIEW
Mark B Horton, Paolo S Silva, Jerry D Cavallerano, Lloyd Paul Aiello
Diabetic retinopathy is a leading cause of new-onset vision loss worldwide. Treatments supported by large clinical trials are effective in preserving vision, but many persons do not receive timely diagnosis and treatment of diabetic retinopathy, which is typically asymptomatic when most treatable. Telemedicine evaluation to identify diabetic retinopathy has the potential to improve access to care, but there are no universal standards regarding camera choice or protocol for ocular telemedicine. We review the literature regarding the impact of imaging device, number and size of retinal images, pupil dilation, type of image grader, and diagnostic accuracy on telemedicine assessment for diabetic retinopathy...
December 2016: Current Diabetes Reports
https://www.readbyqxmd.com/read/27796778/operational-components-of-telemedicine-programs-for-diabetic-retinopathy
#15
REVIEW
Mark B Horton, Paolo S Silva, Jerry D Cavallerano, Lloyd Paul Aiello
Diabetic retinopathy is a leading cause of new-onset vision loss worldwide. Treatments supported by large clinical trials are effective in preserving vision, but many persons do not receive timely diagnosis and treatment of diabetic retinopathy, which is typically asymptomatic when most treatable. Telemedicine evaluation to identify diabetic retinopathy has the potential to improve access to care and improve outcomes, but incomplete implementation of published standards creates a risk to program utility and sustainability...
December 2016: Current Diabetes Reports
https://www.readbyqxmd.com/read/27793471/effect-of-pharmacological-pupil-dilation-on-measurements-and-iol-power-calculation-made-using-the-new-swept-source-optical-coherence-tomography-based-optical-biometer
#16
P Arriola-Villalobos, J Almendral-Gómez, N Garzón, J Ruiz-Medrano, C Fernández-Pérez, J M Martínez-de-la-Casa, D Díaz-Valle
PURPOSE: To determine whether pupil dilation affects biometric measurements and intraocular lens (IOL) power calculation made using the new swept-source optical coherence tomography-based optical biometer (IOLMaster 700(©); Carl Zeiss Meditec, Jena, Germany). PROCEDURES: Eighty-one eyes of 81 patients evaluated for cataract surgery were prospectively examined using the IOLMaster 700(©) before and after pupil dilation with tropicamide 1%. The measurements made were: axial length (AL), central corneal thickness (CCT), aqueous chamber depth (ACD), lens thickness (LT), mean keratometry (MK), white-to-white distance (WTW) and pupil diameter (PD)...
October 25, 2016: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/27779091/pupillary-and-affective-responses-to-maternal-feedback-and-the-development-of-borderline-personality-disorder-symptoms
#17
Lori N Scott, Maureen Zalewski, Joseph E Beeney, Neil P Jones, Stephanie D Stepp
Etiological models propose that a biological vulnerability to emotional reactivity plays an important role in the development of borderline personality disorder (BPD). However, the physiological and phenomenological components of emotional reactivity that predict the course of BPD symptoms in adolescence are poorly understood. This prospective study examines pupillary and affective responses to maternal feedback as predictors of BPD symptom development in adolescent girls over 18 months. Fifty-seven 16-year-old girls completed a laboratory task in which they heard recorded clips of their own mothers making critical or praising statements about them, as well as neutral statements that did not pertain to them...
October 25, 2016: Development and Psychopathology
https://www.readbyqxmd.com/read/27776393/serotonin-syndrome-after-clomipramine-overdose-in-a-child
#18
Meltem Çobanoğulları Direk, Veli Yıldırım, Serkan Güneş, Gülçin Bozlu, Çetin Okuyaz
Serotonin syndrome (SS) is a potentially life-threatening condition associated with increased serotonergic activity in central nervous system and may occur during the use of serotonergic drugs. Although increasing frequency of serotonergic drug use in children, pediatricians, emergency medicine and pediatric intensive care specialists have not enough knowledge and experience about SS that is a potentially life-threatening condition. A 12-year-old girl patient was admitted to our emergency room with the history of involuntary contractions on her extremities and alteration of consciousness...
November 30, 2016: Clinical Psychopharmacology and Neuroscience: the Official Scientific Journal of the Korean College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27756076/measurements-of-retinal-perfusion-using-laser-speckle-flowgraphy-and-doppler-optical-coherence-tomography
#19
Nikolaus Luft, Piotr A Wozniak, Gerold C Aschinger, Klemens Fondi, Ahmed M Bata, René M Werkmeister, Doreen Schmidl, Katarzyna J Witkowska, Matthias Bolz, Gerhard Garhöfer, Leopold Schmetterer
Purpose: This study evaluated the validity of retinal perfusion measurements using laser speckle flowgraphy (LSFG) by means of in vitro experiments and direct comparison with dual-beam Doppler optical coherence tomography (D-OCT) in a healthy Caucasian population. Methods: The flow velocity of scattering solution pumped through a glass capillary was measured at 17 different flow velocities (range, 0.5-47 mm/s) using LSFG. The flow within the glass capillary was produced by a computer-controlled infusion pump...
October 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27753579/objective-pupillary-correlates-of-photosensitivity-in-the-normal-and-mild-traumatic-brain-injury-populations
#20
James Q Truong, Kenneth J Ciuffreda
OBJECTIVE: No objective vision biomarker for photosensitivity currently exists. The present study sought to uncover potential biomarkers for photosensitivity within the pupillary light reflex. METHODS: The pupillary light reflex was evaluated in those with mild traumatic brain injury (mTBI) and in normal individuals, with and without photosensitivity, under a range of test conditions. The Neuroptics DP-2000, infrared, binocular pupillometer was used for both binocular stimulation and recording...
October 2016: Military Medicine
keyword
keyword
117190
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"