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Topic: Electroretinography

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	Electroretinography (ERG) Eye Test and Procedure Information on MedicineNet.com
		Electroretinography is an eye test used to detect abnormal function of the retina (the light-detecting portion of the eye).
		During the test, an electrode is placed on the cornea (at the front of the eye) to measure the electrical responses to light of the cells that sense light in the retina at the back of the eye.
		Decreased electroretinography values may indicate abnormal function of the retina as occurs with conditions such as arteriosclerosis (hardening of the arteries) involving the eye vessels, giant cell arteritis with eye involvement, metabolic diseases called mucopolysaccharidoses, detachment of the retina, siderosis(excess iron), and vitamin A deficiency.
	www.medicinenet.com /electroretinography/article.htm (454 words)

	Electroretinography definition - Medical Dictionary definitions of popular medical terms easily defined on MedTerms
		A test in which the electrical potentials generated by the retina of the eye are measured when the retina is stimulated by light.
		An abnormal ERG is found in conditions such as arteriosclerosis of the retina, detachment of the retina, and temporal arteritis with eye involvement.
		Electroretinography - Read about electroretinography (ERG), an eye test where electrodes placed on the cornea measure electrical responses to light to try to detect abnormal retinal function.
	www.medterms.com /script/main/art.asp?articlekey=8138 (260 words)

	Visual Evaluations using ERG's
		Like other modern electrodiagnostic procedures, electroretinography can involve advanced techniques and sophisticated recording equipment that one might expect to find in a specialty practice or veterinary teaching hospital, or it can be a very simple procedure that can be recorded with uncomplicated instruments.
		Electroretinography has also been performed in Rdy cats which are affected with rod-cone dysplasia (Rdy is the gene symbol).116 In 4.5 week-old kittens, the ERG was absent or just barely recordable using contact lens electrodes, but were recordable using intravitreal needle electrodes.
		Gum, G.G., Gelatt, K.N., and Samuelson, D.A.: Maturation of the retina of the canine neonate as determined by electroretinography and histology.
	www.woodhavenlabs.com /erg.html (13724 words)

	Diagnostic Equipment - Animal Eye Care
		Other indications for ERG testing are to diagnose and differentiate blindness caused by retinal disease, such as Sudden Acquired Retinal Degeneration syndrome (SARDs), from brain or optic nerve-induced blindness.
		Electroretinography is a painless procedure that is performed under sedation or brief general anesthesia.
		If ERG testing is recommended for your pet, we will discuss the procedure and schedule ERG testing as an outpatient procedure (admit the patient to our hospital in the morning, and discharge the patient in the afternoon).
	www.animaleyecare.net /surgery/surgery.htm (930 words)

	Veterinary Vision: Professional Forum Retinal Degeneration
		However, often a dog may not present for ophthalmic examination until the cataracts have progressed so that detailed fundus examination is prevented by the lens opacity.
		In such cases, electroretinography is essential to make this diagnosis and prevent an unnecessary surgery.
		Electroretinography is the electrical response recorded when the retina is stimulated by light.
	www.veterinaryvision.com /dvm_forum/dvm-retdegen.htm (560 words)

	Lifespan's A - Z Health Information Library - Electroretinography (Site not responding. Last check: 2007-10-12)
		Electroretinography is a test to measure the electrical response of the eye's light-sensitive cells (rods and cones).
		Normal test results will show a normal A and B pattern in response to each flash.
		Decreased electroretinography values may indicate any of the following:
	www.lifespan.org /adam/healthillustratedencyclopedia/1/003388.html (474 words)

	Medical Dictionary: Electroretinography - WrongDiagnosis.com
		Electroretinography: Recording retinal electrical activity following stimulation by light.
		Electroretinography : oscillographic recording of the electrical activity in the retina after stimulation by light.
		The description of Electroretinography may also be used for the following terms:
	www.wrongdiagnosis.com /medical/electroretinography.htm (191 words)

	Multifocal electroretinography in patients with Stargardt's macular dystrophy -- Kretschmann et al. 82 (3): 267 -- ...
		Multifocal electroretinography in patients with Stargardt's macular dystrophy -- Kretschmann et al.
		Multifocal electroretinography in patients with Stargardt's macular dystrophy
		In contrast with Ganzfeld electroretinography, multifocal electroretinography is useful to detect foveal dysfunction in SMD.
	bjo.bmj.com /cgi/content/full/82/3/267 (3656 words)

	Diagnosis: Symptoms and Diagnosis of Eye Disorders: Merck Manual Home Edition
		Electroretinography allows a doctor to examine the function of the light-sensing cells (photoreceptors) in the retina by measuring the response of the retina to flashes of light.
		Electroretinography is particularly useful for evaluating diseases, such as retinitis pigmentosa, in which the photoreceptors are affected.
		A probe is placed gently against the closed eyelid and painlessly bounces sound waves off the eyeball.
	www.merck.com /mmhe/sec20/ch225/ch225c.html (2115 words)

	Multifocal and Standard Electroretinography Systems - Neurological Product Matrix - Medcompare
		Description: Neuro-ERG is a modified version of the Neuro-MEP.
		Operation modes: Visual evoked potentials, electroretinography, interelectrode impedance measuring.
		Price information is approximate list price and actual prices may vary.
	www.medcompare.com /matrix/1394/Multifocal-and-Standard-Electroretinography-Systems.html (214 words)

	Welcome to Eurotimes
		MULTIFOCAL electroretinography (mfERG) could offer a useful way to screen which age-related macular degeneration (AMD) patients would benefit from retreatment after photodynamic therapy (PDT), a Canadian study suggests.
		The measurement, which is non-invasive and doesn't take much time, could relieve part of the burden in ophthalmologists' offices by reducing the number of patients coming in for multiple retesting with fluorescein angiography and identifying those who may be appropriate for early retreatment.
		These are the hopes of Canadian researchers who did a preliminary trial investigating whether there is a correlation between multifocal electroretinography (mfERG) measurements of the central area of the retina and the presence of leakage post-PDT.
	www.escrs.org /eurotimes/November2003/Multifocal.asp (718 words)

	Electroretinography - Wikipedia, the free encyclopedia
		This article has been tagged since December 2005.
		Electroretinography, is used to measure the electrical responses of various cell types in the retina, including the light-sensitive cells (rods and cones) and the ganglion cells.
		Electrodes are placed on the cornea and the skin near the eye.
	en.wikipedia.org /wiki/Electroretinography (267 words)

	[Electroretinography in AIDS retinopathy and AIDS cytomegalovirus retinitis with ganciclovir therapy]
		[Electroretinography in AIDS retinopathy and AIDS cytomegalovirus retinitis with ganciclovir therapy]
		The state of the art may have changed since the publication date.
		In the cases of AIDS retinopathy with only a few cotton wool-like spots and with healed peripheral retinochoroiditis, pronounced changes in the ERG were seen regularly; these were most probably caused by ischemia of the inner retinal layers.
	www.aegis.com /aidsline/1988/jul/M8870097.html (372 words)

	ISLRR - Vision 2002 - Abstracts (Site not responding. Last check: 2007-10-12)
		It is important to develop new tests to diagnose the disease before severe visual loss occurs.
		Purpose: to evaluate the pattern electroretinography (PERG) and pattern visual evoked potential(VEP)changes in glaucoma and ocular hypertension.
		Methods: The study was conducted on 30 eyes with primary open angle glaucoma, 20 eyes with ocular hypertension and 20 normal control eyes.
	www.islrr.org /Vision02/606.html (283 words)

	Department of Ophthalmology - Mount Sinai School of Medicine
		Scott Brodie, M.D., Ph.D. Dr. Scott Brodie is Associate Professor of Ophthalmology specializing in Medical Retina and Clinical Electrophysiology, and since 1985 has been the Director of the Department's Electroretinography Laboratory.
		With backgrounds in mathematics, biophysics, and genetics, he brings a broad perspective to the study of inherited, metabolic, and degenerative diseases of the retina in his clinical practice and research.
		He has maintained a comprehensive state-of-the-art clinical and research electrophysiologic laboratory, performing whole-field, focal, and pattern electroretinography, evoked potentials, contrast sensitivity, color vision, and dark adaptometry studies.
	www.mssm.edu /ophth/brodie.shtml (339 words)

	VERIS Multifocal Publications
		Mohidin, N., Yap, M.K.H., Jacobs, R.J. Influence of age on multifocal electroretinography.
		Use of the multifocal electroretinogram to evaluate retinal function after pars plana vitrectomy for diabetic macular edema.
		Correlation of multifocal electroretinography, Humphrey visual fields, and optical coherence tomography using global indices.
	www.electro-diagnostic.com /EDIPub.html (6072 words)

	gms \| \| Multifocal electroretinography and OCT in segmental retinitis pigmentosa
		Multifocal electroretinography and OCT in segmental retinitis pigmentosa
		These may be detected objectively by new electrophysical techniques, such as multifocal electroretinography or by OCT images.
		A 33 years old female patient, showed bilateral caudal bone spiculae formations with corresponding cranial field defects in the static perimetry of the central visual field (Octopus) and in the kinetic perimetry (Goldmann).
	www.egms.de /de/meetings/dog2004/04dog380.shtml (265 words)

	Assessment of angiogenic factors, microalbuminuria and electroretinography in type 1 diabetes mellitus
		Assessment of angiogenic factors, microalbuminuria and electroretinography in type 1 diabetes mellitus
		Diabetic cases were subjected to history taking, clinical examination, fundus examination, electroretinography (ERG) and repeated estimation of glycosylated haemoglobin (HbA1c%) and fasting blood glucose and urinary albumin excretion (UAE) micrograms/minute/1.73m
		Conclusion: Measurement of angiogenic factors and ERG examination are important to predict cases at high risk for development of microvascular complications in type 1 diabetes.
	www.endocrine-abstracts.org /ea/0009/ea0009p9.htm (252 words)

	Retinitis Pigmentosa Overview
		Affected individuals first experience defective dark adaptation or "night blindness," followed by constriction of the peripheral visual field and, eventually, loss of central vision late in the course of the disease.
		The diagnosis of RP relies upon documentation of progressive loss in photoreceptor function by electroretinography (ERG) and visual field testing.
		In the earliest stages when electroretinography reveals defective rod responses in individuals who may not yet have appreciated symptoms, the fundus usually appears normal.
	www.geneclinics.org /profiles/rp-overview/details.html (3168 words)

	Contact lens electroretinography in preterm infants from 32 weeks after conception: a development in current ...
		Contact lens electroretinography in preterm infants from 32 weeks after conception: a development in current methodology -- Mactier et al.
		Contact lens electroretinography in preterm infants from 32 weeks after conception: a development in current methodology
		Recording the ERG from extremely preterm babies using contact lens electrodes is a safe and practicable procedure.
	fn.bmj.com /cgi/content/full/82/3/F233 (2347 words)

	PMCB Faculty De-Ann Pillers (Site not responding. Last check: 2007-10-12)
		My laboratory is focused on investigations of the non-muscle manifestations of Duchenne Muscular Dystrophy and other related muscular dystrophies, with particular emphasis on the role of dystrophin and its associated proteins in electrophysiology.
		We have identified defects by electroretinography that are correlated with patterns of expression of dystrophin isoforms.
		Tests include electroretinography and auditory brainstem response measurements.
	www.ohsu.edu /pmcb/facultyresearch/pillers.shtml (265 words)

	COS: Multifocal Electroretinography May Help Detect Retinal Toxicity Objectively (Site not responding. Last check: 2007-10-12)
		COS: Multifocal Electroretinography May Help Detect Retinal Toxicity Objectively
		HULL, QC -- June 18, 2002 -- Multifocal electroretinography (mERG) can be used to observe changes in retinal function, and determine if there is any pharmacological toxicity associated with treatment, according to a retrospective review.
		The findings were presented Sunday at the annual meeting of the Canadian Ophthalmological Society (COS), in Hull, Quebec, Canada, by Dr. Anuj Bhargava, the study’s principal investigator and a medical resident at the University of Ottawa Eye Institute, in Ottawa, Ontario, Canada.
	www.pslgroup.com /dg/2160a2.htm (456 words)

	THE DIAGNOSTIC VALUE OF MULTIFOCAL ELECTRORETINOGRAPHY IN HEREDITARY RETINAL DEGENERATIONS (Site not responding. Last check: 2007-10-12)
		Background: Multifocal electroretinography is a very important recent innovation in electrophysiological diagnostics.
		The method allows a local resolution of the electrical retinal activity evoked by light stimuli in contrast to the sum response in conventional Ganzfeld ERG.
		Methods: All examinations were performed at the Tübingen eye hospital in the outpatient clinic for hereditary retinal disorders.
	www.dog.org /1998/e-abstract98/424.html (278 words)

	IngentaConnect Multifocal Electroretinography (mfERG) in Insulin Dependent Diabe... (Site not responding. Last check: 2007-10-12)
		Purpose: To study the retinal function, using multifocal electroretinography (mfERG), in diabetic patients with mild and moderate retinopathy, and in diabetics without clinically apparent retinopathy.
		Methods: Thirty-one patients with insulin dependent diabetes mellitus, eleven without any clinically apparent retinopathy, twelve with mild retinopathy and eight with moderate retinopathy, were studied.
		You will be able to remove this item from your shopping cart at any time before you have completed check-out.
	www.ingentaconnect.com /content/klu/doop/2005/00000110/F0020002/00004187 (341 words)

	Journal of Vision - Cone selective adaptation influences L- and M-cone driven signals in electroretinography and ...
		To assess the influence of selective adaptation of long (L) and middle (M) wavelength sensitive cones with electroretinography (ERG) and psychophysics, a novel adaptation procedure was developed, which comprises a selective and quantifiable change in the state of adaptation in the different cone types.
		One adaptation condition was used as a reference.
		Kremers, J., Stepien, M. W., Scholl, H. N., and Saito, C. Cone selective adaptation influences L- and M-cone driven signals in electroretinography and psychophysics.
	journalofvision.org /3/2/3 (391 words)

	Pediatric Departments and Divisions - Ophthalmology
		The New England Eye Center at Tufts-New England Medical Center offers complete clinical and state-of-the-art technical facilities for diagnostic testing and treatment of inherited or acquired eye diseases and vision problems.
		Services and specialties include: refractive error; ocular motility and strabismus surgery; vision therapy; cornea and anterior segment; eye plastics and orbit; glaucoma; neuro-ophthalmology; retinal vascular diseases and surgery; visual electrophysiology and psychophysics; electroretinography; contact lens and visual rehabilitation.
		The Electroretinography (ERG) Service provides electroretinographic testing and evaluation of children and adults.
	www.nemc.org /home/departments/pedi/pdophth.htm (611 words)

	MULTIFOCAL ELECTRORETINOGRAPHY IN THE ENHANCED-S-CONE SENSITIVITY SYNDROME (Site not responding. Last check: 2007-10-12)
		The enhanced s-cone sensitivity syndrome (ESCS) is characterized by absent rod function and large responses due to s-cone hypersensitivity.
		The purpose was to investigate retinal function and topography in ESCS using multifocal electroretinography (MERG).
		Methods: 3 patients were diagnosed as having ESCS based on clinical and ERG criteria.
	www.dog.org /1999/e-abstract99/434.html (233 words)

	Multifocal Electroretinography Systems - Neurology, Neurosurgery & Neurophysiology Products - NeuroZilla
		Multifocal Electroretinography Systems - Neurology, Neurosurgery & Neurophys...
		Coherence Tomography (OCT) multifocal and full-field electroretinography multifocal and standard...
		50) this.border=1" alt="Preview by Thumbshots"> Influence of age on multifocal electroretinography.
	www.neurozilla.com /search/Multifocal-Electroretinography-Systems.html (222 words)

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