Studies on the oscillatory potentials of the clinical electroretinogram. by Peep Algvere

Cover of: Studies on the oscillatory potentials of the clinical electroretinogram. | Peep Algvere

Published by Munksgaard in Copenhagen .

Written in English

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  • Electroretinography.,
  • Electroretinography.

Edition Notes

Bibliography: p. 33-35.

Book details

Statement[Translated from the Swedish by Erica Odelberg]
SeriesActa ophthalmologica. Supplementum, 96
LC ClassificationsRE1 .A22 no. 96
The Physical Object
Pagination35 p.
Number of Pages35
ID Numbers
Open LibraryOL5639028M
LC Control Number68068046

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Get this from a library. Studies on the oscillatory potentials of the clinical electroretinogram. [Peep Algvere]. The Oscillatory Potentials of the Dark-Adapted Electroretinogram in Retinopathy of Prematurity James D. Akula, 1 Julie A.

Mocko, 1, 2 Studies on the oscillatory potentials of the clinical electroretinogram. book Moskowitz, 1 Ronald M. Hansen, 1 and Anne B. Fulton 1 1 Department of Ophthalmology, Children’s Hospital Boston Cited by: Algvere P () Clinical studies on the oscillatory potentials of the human electroretinogram with special reference to the scotopic b-wave.

Acta Ophthahnol 46, –Cited by: Oscillatory potentials are thought to be generated by amacrine cells, while the slow rising ‘c’ wave (Granit's PI) depends on an intact pigment epithelium.

However, the electro-oculogram provides a more effective estimate of the integrity of the pigment epithelium. Oscillatory potentials are lost in. Oscillatory potentials in the retina: what do they reveal. Wachtmeister L(1). Author information: (1)Department of Ophthalmology, Umeå University, Sweden.

This chapter is an overview of current knowledge on the oscillatory potentials (OPs) of the retina. Cited by: Relationships between the electroretinogram a-wave, b-wave and oscillatory potentials and their application to clinical diagnosis.

Authors; Algvere P. Clinical studies on the oscillatory potentials of the human electroretinogram with special reference to the scotopic b Cited by: 6.

Oscillatory Potentials OPs. Some laboratories also include recording oscillatory potentials. Oscillatory potentials (OPs) seen on the ascending limb of most b-waves in both scotopic and photopic bright flash ERG recordings were first described by Cobb and Morton ().

Antimalarials chloroquine, a 4-aminoquinoline, and Plaquenil (hydroxychloroquine), which are also used to treat discoid or systemic lupus erythematosus and rheumatoid arthritis, dermatologic disorders, and Sjogren's syndrome, can be toxic to the retina, producing ring scotomas (Fig.

).Multifocal ERGs better quantify retinal toxicity than full-field ERGs. Origins of the electroretinogram oscillatory potentials in the rabbit retina rabbits to record simultaneously the electroretinogram and the oscillatory potentials.

and clinical studies. THE CLINICAL ELECTRORETINOGRAM. electro-oculogram and electroretinogram oscillatory potential all reflect the mass activity of the retina.

The electroretinogram usually remains normal after. Asi H, Perlman I. Relationships between the electroretinogram a-wave, b-wave and oscillatory potentials and their application to clinical diagnosis. Doc Ophthalmol. ;– Awatramani G, Wang J, Slaughter MM. Amacrine and ganglion cell contributions to the electroretinogram in amphibian retina.

Automated Oscillatory Potential Detection and Parameter Extraction in the Electroretinogram Dept. Ophthalmology, 55 Lake Ave. North, Worcester, MA USA Abstract— The oscillatory potentials (OPs) of the electroretinogram (ERG) have long been used to study the progression of a number of retinal disorders.

The OP parameters used in. Spatial Distribution of Rat Oscillatory Potentials Evaluated using the Multi-Electrode Electroretinogram BY MARYAM HANIF B.S., University of Illinois at Chicago, THESIS Submitted as partial fulfillment of the requirements for the degree of Masters of Science in Bioengineering in the Graduate College of the.

The long-awaited second edition of an authoritative reference on electrophysiologic vision testing, including detailed information on techniques and problems, basic physiology and anatomy, theoretical concepts, and clinical findings; with extensive new material. This authoritative text is the only comprehensive reference available on electrophysiologic vision testing, offering both practical 5/5(1).

Clinical Ocular Electrophysiology. By Fatih C. Gundogan and Umit Yolcu. In these brighter light levels, a–wave has a clear single peak. Oscillatory potentials, which reflects amacrine cell function is recorded using standard flash light intensity under dark-or light Help us write another book on this subject and reach those Fatih C.

Gundogan, Umit Yolcu. Abstract The spatial properties of the trans- and intra-retinal oscillatory potentials (OPs), a- and b-waves of the mudpuppy electroretinogram (ERG) were analyzed.

A comparison of the intra-retinal potentials was made with the proximal negative response (PNR), an extracellular response, predominantly from. According to the International Society for Clinical Electrophysiology of Vision (ISCEV), the standard ERG examination (Table 1) consists of a minimum of 5 different surveys: scotopic ERG (dark adapted eye and weak flash), massive combined ERG (dark eye and strong flash), oscillatory potentials, photopic ERG (ERG cone with strong flash and Cited by: Andrew U.

Meyer received the Ph.D. in electrical engineering from Northwestern University in Between and he was a Member of the Technical Staff at Bell Laboratories at Whippany, New Jersey, where he was engaged in research on automatic control problems pertaining to satellite attitude control and missile autopilots.

Electroretinogram in Hereditary Retinal Disorders. By Fatih Cakir Gundogan, Ahmet Tas and Gungor Sobaci. The rod and cone responses may be functionally dissected with ERG in the light of International Society for Clinical of Vision (ISCEV) recommendations (Marmor et al., ) (Figure 1).

The oscillatory by: 3. An electroretinogram (ERG) test performed in A historical photo of a patient undergoing an electroretinogram. Electroretinography measures the electrical responses of various cell types in the retina, including the photoreceptors (rods and cones), inner retinal cells (bipolar and amacrine cells), and the ganglion D Electroretinography (ERG) is an eye test that detects function of the retina (the light-detecting portion of the eye).

The retina is comprised of layers of specialized cells, including photoreceptors (rods and cones), that detect light and ganglion cells that transmit images to the brain.

Specifically, the ERG picks up electrical signals from the photoreceptors, as well as other cells (Muller. The oscillatory potentials Principles and Practice of Clinical Electrophysiology of Vision St.

Louis, Mo, USA Mosby Year Book 11 Wachtmeister L. Oscillatory potentials in the retina: what do they reveal Progress in Retinal and Eye Research 17 4 /s(98) 2-s 12 Yonemura D.

Tsuzuki K. The oscillatory potentials shown in Figure are small amplitude waves that appear in the light-adapted b-wave. Although they are known to be generated in the inner retinal layer and require a bright stimulus, the significance of each wave is unknown.

Recording the electroretinogram (ERG) in dogs has become a standard procedure in clinical ophthalmology. The ERG provides highly objective information about retinal function that is otherwise unobtainable from dogs.

However, problems may be encountered in measuring the latencies and amplitudes of the a and b waves, depending upon the amplifier bandwidth used to record the by: 9. Journal of Ophthalmology is a peer-reviewed, Open Access journal that publishes original research articles, review articles, and clinical studies related to the anatomy, physiology and diseases of the Ercüment Çavdar, Abdullah Ozkaya, Burcu Alper.

Retrolental Fibroplasia and ERG.- On the Recovery of the Electroretinogram of Rats after Removal of Intravitreal Iron Particles.- Electrophysiological and Clinical Findings after Acute Chloroquine Poisoning.- Synchronization of ERG Signs of Retinal Ischemia.- The Actions of Opiates on the Oscillatory Potentials of the Electroretinogram (ERG) Jun 01,  · The influence of zinc and taurine on oscillatory potentials (OP) has not been reported.

Oscillatory potentials are a series of rhythmic consecutive discharges of retinal neurons found superimposed on the b-wave of the electroretinogram (Speros and Price ). It is thought that these oscillations are generated independently from the mechanism Cited by: Introduction The electroretinogram (ERG) is a useful tool for objective, non-invasive assessment of retinal function both in the clinic and the laboratory.

It is a mass electrical potential that represents the summed response of all the cells in the retina to a change in illumination.

Recordings can be made in vivo under physiological or nearly. Mar 16,  · Nilsson SEG () Clinical application of direct coupled recording of the electroretinogram c-wave and of the fast and slow (light peak) oscillations. In: Heckenlively JR & Arden GB (Eds.), Principles and Practice of Clinical Electrophysiology of Vision, Mosby Year Book, St.

Louis, Baltimore, Boston. Experimentally Reduced Perfusion of One Eye Impairs Retinal Function in Both Eyes. Several clinical studies have also shown that the amplitude of the pERG is reduced in ocular hypertension 11–14 and glaucoma 15,16 and that the Brunette JR, Desrochers R.

Oscillatory potentials: a clinical study in diabetics. Can J Ophthalmol ; Analysis and Processing of Human Electroretinogram by Abdulrahman Alaql A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Electrical Engineering Department of Electrical Engineering College of Engineering University of.

Empiric Mode Decomposition To Extract Electroretinogram Oscillatory Potentials for the Detection of Early Diabetic Retinopathy Detection of diabetic retinopa Detection of diabetic retinopathy currently depends on vascular alterations that typically occur after years of hyperglycemia.

Validation of Automatic Measurement of Electroretinogram B-Wave Parameters after Elimination of Oscillatory Potentials Minzhong Yu1,2 1 Cole Eye Institute (I), Cleveland Clinic Foundation, Euclid Avenue, Cleveland, USA 2 Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Euclid Avenue, Cleveland, USAAuthor: Minzhong Yu.

Oscillatory potential was studied in diabetics with varying degrees of retinopathy. The mean sum of oscillatory potentials (?OP) progressively decreased as the severity of NPDR increased. However with further progression, although the latency increased but the.

FACULTY PROFILE: Suresh Viswanathan FEATURED REVIEW: A Brief Review of Visual Electrodiagnostic Techniques Many readers are very familiar with the book Clinical Refraction, by Borish, the third edition of which was published in Now, thirty-six years later, the second edition of are oscillatory potentials (OPs) that appear as.

Electroretinography is a noninvasive method of evaluating retinal function, which is especially useful when evaluating patients with cataracts. This study was undertaken to characterize the normal latencies, amplitudes, and presence of oscillatory potentials in the electroretinogram of Hispaniolan Amazon parrots (Amazona ventralis).

Six healthy 3-year-old parrots with clinically normal eyes Cited by: Jan 01,  · Determination of the presence of the major haplotype in patient 1. A, KpnI digest of a –base pair (bp) polymerase chain reaction fragment encompassing exons 3 and 4 of the ML4 gene for patient 1 (individual III) and immediate family members.

After digestion, the parents show bp, bp, and bp bands indicating that they are heterozygous for the acceptor splice-site mutation, as is Cited by: May 01,  · However, it has also been described that neuronal damage may precede any detectable microvascular changes, and the deterioration of the intrinsic time and also of oscillatory potentials in the electroretinogram start early, in some cases as early as 2 days.

Electrodiagnostic Evaluation of Visual Function. Michael H. Sims, PhD. Behavioral Responses to Visual Stimulation When electromagnetic waves in the range of visable light enter the eye, the result is an alteration of electrical potentials in millions of retinal cells.

The purpose of this longitudinal study was to identify changes in ERG responses associated with vigabatrin treatment. We accomplished this by recording longitudinally ERGs in children before and during vigabatrin treatment and comparing results between children on vigabatrin monotherapy and those taking additional anticonvulsive medications.

You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them.To date, most studies involving in vivo electroretinography in mice are performed on steady state adapted animals.

In this study, we focused on the dynamics of adaptation to high and low light levels in the mouse retina. Two flash electroretinogram (ERG) protocols and one flicker ERG protocol were employed.

In the two flash ERG protocols, the animals were adapted to either 25 or 40 cd/m2 white Cited by: 1.Apr 01,  · PURPOSE Mutations in the dystrophin gene result in Duchenne muscular dystrophy (DMD).

DMD is associated with an abnormal electroretinogram (ERG) if the mutation disrupts the translation of retinal dystrophin (Dp). Our aim was to determine if incomplete ERG abnormalities would be associated with heterozygous carriers of dystrophin gene mutations.

METHODS Ganzfeld Cited by:

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