61. Introduction: Nystagmus - WrongDiagnosis.com Introduction to nystagmus as a medical condition including symptoms, diagnosis, misdiagnosis, treatment, prevention, and prognosis. http://www.wrongdiagnosis.com/n/nystagmus/intro.htm

Home Symptoms Diseases Risks ... Diseases Search our medical database Subscribe to our free Newsletter sample Send this page to a friend Condition Lists By Organ By Symptom By Class By Prevalence ... List A-Z Current chapter: Nystagmus Next sections Basic Summary for Nystagmus Causes of Nystagmus Symptoms of Nystagmus Misdiagnosis of Underlying Causes of Nystagmus ... Statistics about Nystagmus Next chapters: Oligohydramnios Onychogryphosis Papilloedema Papilloma ... Feedback Introduction: Nystagmus Nystagmus: Involuntary jerky eye movements Researching symptoms of Nystagmus: Further information about the symptoms of Nystagmus is available including a list of symptoms of Nystagmus , or alternatively return to research other symptoms in the symptom center Causes of Nystagmus: Research more detailed information about the causes of Nystagmus , other possibly hidden causes of Nystagmus , or other general information about Nystagmus Statistics and Nystagmus: Various sources and calculations are available in statistics about Nystagmus , and you can also research other medical statistics in our statistics center Contents for Nystagmus: Basic Summary for Nystagmus Causes of Nystagmus Symptoms of Nystagmus Misdiagnosis of Underlying Causes of Nystagmus ... Glossary for Nystagmus Last revision: June 4, 2003

62. Nystagmus Learn the definition of nystagmus and other multiple sclerosisrelated terms. http://ms.about.com/od/msglossaryiq/g/Nystagmus2.htm

var zLb=1; var zIoa1 = new Array('Other MS terms','Tonic Spasm','http://ms.about.com/od/glossaryofmsterms/g/TonicSpasm.htm','Ataxia','http://ms.about.com/cs/glossary/g/Ataxia.htm','Dysesthesia','http://ms.about.com/cs/glossary/g/dysesthesias.htm'); var zIoa2 = new Array('Treatment','Detrol LA','http://ms.about.com/od/bladderbowel/a/DetrolLA.htm','Tysabri','http://ms.about.com/od/immunomodulators/a/Tysabri.htm','Levitra','http://ms.about.com/od/treatment/a/Levitra.htm'); var zIoa3 = new Array('Read About MS','Publications','http://ms.about.com/od/publications/','Books',' http://ms.about.com/od/bookreviews/','Websites','http://ms.about.com/od/websites/'); zJs=10 zJs=11 zJs=12 zJs=13 zc(5,'jsc',zJs,9999999,'') zfs=0;zCMt='a65' About Multiple Sclerosis Glossary MS Glossary I-Q Nystagmus Multiple Sclerosis Essentials FAQ Support ... Help zau(256,140,140,'el','http://z.about.com/0/ip/417/C.htm','');w(xb+xb+' ');zau(256,140,140,'von','http://z.about.com/0/ip/496/6.htm','');w(xb+xb); FREE Newsletter Sign Up Now for the Multiple Sclerosis newsletter!

63. Nystagmus FAQ Most people searching for information about nystagmus are parents who, after having nystagmus is an involuntary movement of the eyes, which is often http://www.geocities.com/EnchantedForest/Meadow/8921/nystagmus.html

New Vision main page Nystagmus FAQ Most people searching for information about Nystagmus are parents who, after having noticed their child's unsteady gaze, dropped in to the doctor to check out what they hoped was a minor problem... What is Nystagmus? N ystagmus Network Homepage or the UK Nystagmus Action Group page. What is the difference between congenital and acquired Nystagmus? Congenital Nystagmus is that which exists from birth or soon after. Apparently, some Nystagmus is normal in an infant, but it should be investigated if it persists. Acquired Nystagmus can appear later in life as a result of medications, head trauma, tumors, and a variety of other things. What is visual acuity like with Nystagmus? Anywhere from 20/20-20/400 with Nystagmus alone. ( What do those numbers mean? What causes congenital Nystagmus? Nystagmus is not the result of something the parent did or failed to do. It can be hereditary but often it isn't. It can be the result of another condition (which is why, when the symptoms of Nystagmus are noted, the parents should see a doctor) or it can appear alone. Sometimes a cause can be attached to it, but for the most part, the reason for it remains unknown. Has Nystagmus been linked to Shaken Baby Syndrome?

64. Nystagmus ataxic nystagmus ie. nystagmus greater in abducting eye, with impaired adduction; brainstem disease (usually causes horizontal nystagmus) http://www.geocities.com/davidscerri/nystagmus.htm

NYSTAGMUS horizontal nystagmus: labyrinthine and vestibular causes: (damage to inner ear, VIIIth nerve, VIIIth nerve nucleus or its brainstem connections (NB: labyrinthine causes usually also give vertigo, vomiting, deafness ± tinnitus) acute labyrinthitis acute alcoholism middle ear disease or surgery Meniere's disease multiple sclerosis syringobulbia basilar artery ischaemia cerebellar causes (lesions of lateral lobes): multiple sclerosis hereditary ataxias vascular lesions phenytoin barbiturates alcohol ataxic nystagmus [ie. nystagmus greater in abducting eye, with impaired adduction; damage to medial longitudinal fasciculus causing internuclear ophthalmoplegia]: multiple sclerosis (usually bilateral) brainstem vascular disease (unilateral) vertical nystagmus: sedatives, especially phenytoin brainstem disease (usually causes horizontal nystagmus) foramen magnum lesions (down-beating nystagmus) pinealoma (inability to look up and adductor nystagmus) pendular and rotary nystagmus: congenital [decreased by convergence; appears to convert to jerk nystagmus on lateral gaze] inability to fix (partial blindness): albinism severe refractive errors macular disease positional nystagmus: peripheral type [+ marked vertigo = benign paroxysmal positional vertigo] central type (vertigo not marked): lesions of cerebellum / brainstem / vestibular connections

65. Nystagmus Definition - Medical Dictionary Definitions Of Popular Medical Terms Online Medical Dictionary and glossary with medical definitions. http://www.medterms.com/script/main/art.asp?articlekey=4604

66. ► Eye Movements - Uncontrollable Back and forth eye movements; Horizontal nystagmus; Involuntary oscillation nystagmus refers to rapid involuntary movements of the eyes that may be from http://www.umm.edu/ency/article/003037.htm

var MenuLinkedBy='AllWebMenus [2]', awmBN='530'; awmAltUrl=''; Disease Nutrition Surgery Symptoms Injury Poison Tests Special Topics ... P Q R S T U ... W X Y Z Maryland Medical Center Programs Ophthalmology Home Medical Reference Encyclopedia (English) Toggle English Spanish Eye movements - uncontrollable Overview Treatment Definition: Uncontrollable eye movements are involuntary, rapid, and repetitive movement of the eyes. Alternative Names: Back and forth eye movements; Horizontal nystagmus; Involuntary oscillation of the eye(s); Nystagmus; Rapid eye movements from side to side; Rotary nystagmus; Side to side movements of the eyes; Uncontrolled eye movements; Vertical nystagmus Considerations: Nystagmus refers to rapid involuntary movements of the eyes that may be from side to side (horizontal nystagmus), up and down (vertical nystagmus) or rotary. Depending on the cause, these movements may be in both eyes together or in just one eye. The term "dancing eyes" has been used in regional dialect to describe nystagmus. The abnormal eye movements of nystagmus are caused by abnormalities of function in the areas of the brain that controls eye movements, but the exact nature of these disorders is often poorly understood. Nystagmus may be either congenital (present at birth) or may be caused by disease or injury later in life.

67. Eye : Women Beauty nystagmus is characterized by an involuntary movement of the eyes, The involuntary eye movements of nystagmus are caused by abnormal function in the http://www.womenfitness.net/beauty/eye/nystagmus.htm

Nystagmus TYPES CAUSES DIAGNOSIS TREATMENT ... DIET AND NYSTAGMUS Nystagmus is characterized by an involuntary movement of the eyes, which may reduce vision or be associated with other, more serious, conditions that limit vision. Most frequently it is composed of a mixture of slow and fast movements of the eyes. Nystagmus can occur normally, such as when tracking a visual pattern. Nystagmus may also be abnormal, usually in situations where one would want the eyes to be still, but they are in motion. The involuntary eye movements of nystagmus are caused by abnormal function in the areas of the brain that control eye movements. The exact nature of these disorders is poorly understood. Muscles of the eye T here are six muscles that control the movement of each eye ball. The image shows the six muscles of the right eye. TYPES Nystagmus may be either congenital (present at birth) or may be acquired (caused by disease or injury later in life). Congenital Nystagmus- It is the most common. It is usually mild, does not change in severity, and is not associated with any other disorder. Affected people are not aware of the eye movements, although they may be noticed by a careful observer. If the movements are of large amplitude, visual acuity (sharpness of vision) may be less than 20/20. Surgery may improve visual acuity. Acquired Nystagmus A less common cause of nystagmus is disease or injury of the central nervous system. The most common cause of acquired nystagmus is head injury from motor vehicle accidents in young people. In older people the most common cause is

68. Nystagmus National. Founded 1999. Network of persons affected by nystagmus, an involuntary, rapid movement of http://webcenter.health.webmd.netscape.com/hw/vision/shc29nys.asp

var guid_source = ""; var guid_source_id = ""; //unused var encodedurl = ""; WebMD Today Home WebMD News Center XML News via RSS Member Services WebMD University My WebMD Find a Physician Medical Info Check Symptoms Medical Library Health Tools Clinical Trials ... Women, Men, Lifestyle Who We Are About WebMD Site Map You are in Women, Men, Lifestyle Overview Aging Alternative Medicine Dental Emotional Wellness Eye Health Fitness Healthy Sexuality Men Women Health Topics Symptoms Medical Tests Medications ... American Nystagmus Network Nystagmus American Nystagmus Network National. Founded 1999. Network of persons affected by nystagmus, an involuntary, rapid movement of the eyeball. Open to parents of affected children, adults with nystagmus, and interested professionals. Provides general information. Promotes research into cause and cure. E mail discussion group, discussion board, and biannual newsletter and conferences. WRITE: American Nystagmus Network, Inc. 303 D Beltline Place #321 Decatur, IL 35603 E-MAIL: webmaster@nystagmus.org WEBSITE: http://www.nystagmus.org

69. Nystagmus, Benign Paroxysmal Positional Benign Paroxysmal Positional nystagmus is a disorder of the vestibular system in the middle ear that http://webcenter.health.webmd.netscape.com/hw/balance_disorders/nord422.asp

var guid_source = ""; var guid_source_id = ""; //unused var encodedurl = ""; WebMD Today Home WebMD News Center XML News via RSS Member Services WebMD University My WebMD Find a Physician Medical Info Check Symptoms Medical Library Health Tools Clinical Trials ... Women, Men, Lifestyle Who We Are About WebMD Site Map Health Topics Symptoms ... For a Complete Report Nystagmus, Benign Paroxysmal Positional Important It is possible that the main title of the report Nystagmus, Benign Paroxysmal Positional is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report. Synonyms BPPN Cupulolithiasis Labyrinthine Positional Nystagmus Paroxysmal Positional Nystagmus Disorder Subdivisions None General Discussion Benign Paroxysmal Positional Nystagmus is a disorder of the vestibular system in the middle ear that causes dizziness due to altered function of the semicircular canals, usually involving the posterior canal but sometimes involving the horizontal canal. The dizziness, which is accompanied by abnormal eye movements or nystagmus, occurs suddenly and without warning; thus, it is "paroxysmal". It is also "positional" because the symptoms increase with certain movements of the head or body. It is the position of the head, rather than the movement, that causes the symptoms. Resources Vestibular Disorders Association (VEDA) P.O. Box 4467

70. Neurology -- Collected Resources : Nystagmus Benign positional nystagmus A study of its threedimensional spatio-temporal Jerky seesaw nystagmus in isolated internuclear ophthalmoplegia from focal http://www.neurology.org/cgi/collection/nystagmus

HOME HELP FEEDBACK SUBSCRIPTIONS ... SEARCH RESULT QUICK SEARCH: [advanced] Author: Keyword(s): Year: Vol: Page: Nystagmus Citations 1-10 of 24 total displayed. Most recent content (28 Jun 2005): NEUROIMAGES Hyperventilation-induced nystagmus in vestibular schwannoma Kwang-Dong Choi, Hyun Ji Cho, Ja-Won Koo, Seong-Ho Park, and Ji Soo Kim Neurology 2005; 64: 2062. [Full text] [PDF] Past content (since Jan 2001): ARTICLES Benign positional nystagmus: A study of its three-dimensional spatio-temporal characteristics S. T. Aw, M. J. Todd, G. E. Aw, L. A. McGarvie, and G. M. Halmagyi Neurology 2005; 64: 1897-1905. [Abstract] [Full text] [PDF] CLINICAL/SCIENTIFIC NOTES Jerky seesaw nystagmus in isolated internuclear ophthalmoplegia from focal pontine lesion K. Oh, J. H. Chang, K. -W. Park, D. -H. Lee, K. -D. Choi, and J. S. Kim Neurology 2005; 64: 1313-1314. [Full text] [PDF] CLINICAL/SCIENTIFIC NOTES Isolated perverted head-shaking nystagmus in focal cerebellar infarction J. S. Kim, K-W. Ahn, S. Y. Moon, K-D. Choi, S-H. Park, and J-W. Koo

71. Visual Reaction Time jerking of the eyes called nystagmus (from the Greek, meaning to nod). nystagmus may also be a sign of malfunction in one of the stages of the system http://biology.clc.uc.edu/fankhauser/Labs/Anatomy_&_Physiology/A&P202/Nervous_Sy

NYSTAGMUS DEMONSTRATION: A VISUAL REFLEX MEDIATED BY SEMICIRCULAR CANALS Professor of Biology and Chemistry University of Cincinnati Clermont College, Batavia OH 45103 spin student safely for 10 turns This page has been accessed times since 13 February 2003. 28 January 1993, rvsd 31 Dec 1994, 6 Feb '97 halt student, closely observe eyes Tracking objects is a complex activity under normal circumstances, but the complexity is markedly increased during movement of the head. There is a system within the brain located in the superior colliculi which receives information on rotation of the head from the semicircular canals. The superior colliculi then directs eye movements via the extrinsic muscles of the eye to compensate for these head movements. The effects of this system can be seen when it over compensates from prolonged rotation of the body. The semicircular canals become accommodated to the rotation, and when the rotation is halted, the endolymph continues to move, triggering impulses interpreted in the superior colliculi as strong rotational acceleration signals. It therefore directs the compensating jerking of the eyes called nystagmus (from the Greek, meaning to nod). Nystagmus may also be a sign of malfunction in one of the stages of the system responsible for this reflex. NYSTAGMUS DEMONSTRATION 1. Place student on rotating stool, away from all furniture, sharp corners, etc.

72. The Scoop On Smoking :: Nystagmus Smoking can cause nystagmus. Scientists think that this is probably due to nicotine, which can disrupt the brain s balance center. http://thescooponsmoking.org/xhtml/effects/nystagmus.php

//to help browsers that don't like an empty tag The Scoop On Smoking from ACSH: what every teen should know about tobacco Health Effects Quitting True Stories Quizzes ... Advanced Search what every teen should know about tobacco This effect the bottom line definition all (for printing) Related effects senses senses gateway page cancer of the mouth cancer of the nose ... senses gateway page nystagmus the bottom line Smoking can cause nystagmus. Scientists think that this is probably due to nicotine, which can disrupt the brain's balance center. definition Nystagmus is a technical term for abnormal jerky or circular movements of the eye. definition Nystagmus is a technical term for abnormal jerky or circular movements of the eye. the bottom line definition all (for printing) for related effects see sidebar about us ACSH home faq sitemap ... useful resources The American Council on Science and Health is a consumer eduction consortium with a board of 350 physicians, scientists, and policy advisors.

73. NTLC Legal Issues/Resources - Horizontal Gaze Nystagmus (HGN) Horizontal Gaze nystagmus The Science and The Law A Resource Guide for Judges, Prosecutors, and Law Enforcement. Preface, Forward, and Acknowledgements http://www.ndaa-apri.org/apri/programs/traffic/hgn.html

About APRI Contact APRI Employment Horizontal Gaze Nystagmus (HGN) Horizontal Gaze Nystagmus The Science and The Law: A Resource Guide for Judges, Prosecutors, and Law Enforcement Preface, Forward, and Acknowledgements The Science and The Law Glossary Appendix A - Combined Test Scoring Procedure ... Contact Us American Prosecutors Research Institute 99 Canal Center Plaza, Suite 510, Alexandria, VA 22314

74. Psyshop Sundance Records Nystagmus - The Immaculate Perception (CD) Music Mailorder Sundance Records nystagmus The Immaculate Perception; cd. http://www.psyshop.com/shop/CDs/sud/sud1cd027.html

75. Nystagmus nystagmus is an unintentional jittery movement of the eyes. nystagmus usually involves both eyes and is often exaggerated by looking in a particular http://ww3.komotv.com/global/story.asp?s=1230703

76. Nystagmus - Definition Of Nystagmus In General Noun 1. nystagmus involuntary movements of the eyeballs; the presence or absence of nystagmus is used to diagnose a variety of neurological and visual http://dictionary.laborlawtalk.com/nystagmus

Add to Favorites General Encyclopedia Legal ... Law forum Search Word: Visit our Law forums Labor Law Accidents Law Bankruptcy Law Business Law ... Tax Law Noun nystagmus - involuntary movements of the eyeballs; the presence or absence of nystagmus is used to diagnose a variety of neurological and visual disorders Nystagmus n. (Med.) A rapid involuntary oscillation of the eyeballs. Browse Nyssa sylvatica nymphomaniac nystagmus O'Flaherty ... oaf Search Word: General Encyclopedia Legal Medical Computer Science Law Forum Embed a dictionary search in your own web page Link to Us Advertise Add to Favorites ... Legal notices

77. University Of Iowa EyeRounds.org The first case reported of seesaw nystagmus was in 1913 by Maddox (1913). See-saw nystagmus (SSN) is a rare ocular presentation with less than 50 cases http://webeye.ophth.uiowa.edu/eyeforum/case23.htm

Patient Info Genetic Tests About Us Contact Us ... Macular Degeneration See-Saw Nystagmus: 64 year old man who first noted the onset of oscillopsia five months prior to presentation. Presented by Susannah Quisling, M.D. Faculty: Randy Kardon, M.D., Ph.D. Edited by Andrew Doan, M.D., Ph.D., Thomas Oetting, M.D., and Thomas Weingeist, M.D., Ph.D. CC: 64 year old man who first noted the onset of oscillopsia five months prior to presentation. HPI: He had never noticed this in the past, and he noted that it worsened in up-gaze and in central gaze and improved in down gaze and in left and right lateral gaze. PMH/FH/POH: His medical history was significant for hypercholesterolemia and an bicycle accident with multiple skull fractures 15 years prior to presentation. His medications included Simvastatin 80 mg qd and Aspirin 81 mg po qd. EXAM Best corrected visual acuities: 20/40 OD and 20/25 OS. Pupils: No RAPD EOM: full OU with See-Saw Nystagmus. In one half of the cycle, the right eye will rise and intort and the left eye will fall and extort; then in the next half cycle, the vertical and torsional components are reversed. Click here for video in Windows Media Format.

78. VOR Nystagmus Model the ramp stimulus the eye breaks into nystagmus a sawtooth waveform of quick and slow phases. In Assgn 3N you will model nystagmus, but only for VOR. http://www.engin.brown.edu/courses/en122/Assgn/Assgn3Nb.htm

Assgn 3N Nystagmus Background: It will be important to keep in mind that vestibular and optokinetic responses attempt to match eye speed with stimulus speed , without much importance as to what the eye is foveating on, if anything (consider VOR in the dark). Requirements: (1)Add to your VOR model a nystagmus feature. Make sure the quick phase of nystagmus is about 400 deg/sec. You will want to study the SR flip flop (latch) under the EXTRAs menu of Simulink. A SR latch will help add hysteresis to your controller, so the quick phase endures for a radian or so. Notice that when S = R = = logic-low the output Q remains unchanged, and is therefore a memory state of the latch; furthermore S=R=1 is NOT ALLOWED, or the output is "unspecified". efference copy of eye position, from the integrator in the OMN. (Another case of feedback, this time to create a bang-bang controller.) The output Q of your SR latch can go to a switch control, with threshold likely 0.5. The two choices of "data input" for the switch can be the quick and slow phase controls for nystagmus. Let the output of the switch go to the OMN (whose integrator provides eye position information to the relational operators).

79. Neuro-Ophthalmology Lecture - Nystagmus There is endpoint nystagmus at the extremes of lateral gaze, optokinetic nystagmus when the eyes follow stripes on a rotating drum, nystagmus when http://eyelearn.med.utoronto.ca/Lectures04-05/NeuroOphth/23Nystagmus.htm

Home Lectures Neuro-Ophthalmology Tests of the Optic Nerve Vision Visual Fields Ocular signs of neurological disease Cerebrovascular Disease Trauma Cranial nerves CN II CN III CN IV CN V ... CN VI Diseases of the Optic Nerve: Papilledema Optic Atrophy Disc Edema Tests ... Neuroimaging Pupils RAPD Unequal Pupils Equal Pupils Ocular Motility Diplopia Ocular Movements Extraocular Muscle Palsies Systemic Conditions Mysathenia Gravis Internuclear Ophthalmoplegia Supranuclear Lesions Nystagmus 1) NORMAL NYSTAGMUS: There is endpoint nystagmus at the extremes of lateral gaze, opto-kinetic nystagmus when the eyes follow stripes on a rotating drum, nystagmus when stimulating the semicircular canal and voluntary nystagmus, which can only last a few seconds. 2) PATHOLOGICAL NYSTAGMUS: Most commonly it is congenital and of little consequence. It is exaggerated when one eye is occluded. The defect is equal (pendular) in the case of a sensory deficit, and jerky if there is a motor deficit. There is frequently a null point (at which there is minimal or no nystagmus) and patients are usually asymptomatic.

80. Nystagmus, Pathologic nystagmus Network. This site, providess basic information on the A patientoriented information sheet on nystagmus, an involuntary movement of the eyes. http://omni.ac.uk/browse/mesh/D009759.html

low graphics Nystagmus, Pathologic broader: Ocular Motility Disorders other: Strabismus Nystagmus Network This site, providess basic information on the condition and articles on specific aspects of nystagmus, an eye condition characterised by rapid, jerky eye movements. There is a section of FAQs, and information on the activities and publications of the group. Patient Education Organizations, Nonprofit Nystagmus, Pathologic Great Britain ... Understanding nystagmus A patient-oriented information sheet on nystagmus, an involuntary movement of the eyes. It explains who is affected, the symptoms, and treatment. A glossary of terms is also provided. Produced jointly by the Royal College of Ophthalmologists and the Royal National Institute for the Blind. This 5 page document is in PDF, which requires Adobe Acrobat Reader. Patient Education Handout [Publication Type] Nystagmus, Pathologic Last modified: 09 Sep 2005

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