DJO | Digital Journal Of Ophthalmology The clinical impression at this time was downbeat nystagmus (DBN), Studies havesuggested that DBN is a pathologic central vestibular nystagmus caused http://www.djo.harvard.edu/print.php?url=/physicians/gr/327&print=1
DJO | Digital Journal Of Ophthalmology Downbeat nystagmus Secondary to Bony Cervicomedullary Junction Studies havesuggested that DBN is a pathologic central vestibular nystagmus caused by http://www.djo.harvard.edu/site.php?url=/physicians/gr/327&page=GR_DS
Extractions: Diseases and Disorders Links pertaining to Eye Diseases Alert! Patients and laypersons looking for guidance among the target sources of this collection of links are strongly advised to review the information retrieved with their professional health care provider. Start Page Contents: Acute Zonal Occult Outer Retinopathy (not on MeSH) Adie Syndrome Adie Syndrome Albinism, Ocular ... VITREOUS DISORDERS (not on MeSH) Eye Diseases Anatomy, Physiology and Pathology of the Human Eye [TM Montgomery] Physical Structures of the Eye [text only; L Hahn] - U. of Pennsylvania (US) Colored Eyes - TipsOfAllSorts About the 'Blind Spot' Actually: The Main Lens of Your Eye Is Not Inside The Eye Simulations of certain eye problems - Ohio LIONS Eye Research Foundation Distance Vision Test - Perrot Optic (CH) About Visual Acuity [TM Montgomery] and the typical Visual Acuity Test - ADAM, via MedlinePlus The Eye Exam [C Goldberg] - School of Medicine, UCSD (US) Eye examination - Indiana University (US) School of Optometry , and
Extractions: Vol. 117 No. 2, February 1999 Featured Link E-mail Alerts Clinicopathologic Report Article Options Full text PDF Send to a Friend Readers Reply Submit a reply Similar articles in this journal Literature Track Add to File Drawer Download to Citation Manager PubMed citation Articles in PubMed by Martidis A Biller J Articles that cite this article ISI Web of Science (8) ... Contact me when this article is cited Topic Collections Neurology Ophthalmological Disorders, Other Topic Collection Alerts Neuro-ophthalmic, Radiographic, and Pathologic Manifestations of Adult-Onset Alexander Disease Arch Ophthalmol. A 61-year-old woman had a 3-year history of imbalance. Eye movement studies revealed square-wave jerks, gaze paretic nystagmus, rebound nystagmus, impaired smooth pursuit, impaired optokinetic nystagmus, and abnormal fixation suppression of vestibular nystagmus.
Ny : On Medical Dictionary Online nystagmus, pathologic nystagmus, Pendular nystagmus, Periodic Alternating nystagmus, Permanent nystagmus, Physiologic nystagmus, Physiological http://www.online-medical-dictionary.org/ny.asp?q=~Ny
Extractions: About APRI Contact APRI Employment PREDICATE QUESTIONS EMERGENCY ROOM PHYSICIAN Several medical specialties use a form of nystagmus testing in diagnosing patients, for example, emergency room physicians, ophthamologists, neuro-ophthamologists. Although not necessary, the testimony of a medical expert supports the use of the HGN test in the broader community, not just law enforcement, and gives the weight of medicine to the validity of the test. It is preferable to use an expert with an interest in the subject beyond just testifying as an expert and who has actually witnessed officers administering the test. Please state your name for the record. What is your occupation? Where did you attend college? What did you study? Where did you go to medical school? When did you graduate?
Penn State Faculty Research Expertise Database (FRED) , Involuntary rhythmical movements of the eyesin the normal person. Electronystagmography nystagmus, pathologicnystagmus, Physiologic. http://fred.hmc.psu.edu/ds/retrieve/fred/meshdescriptor/D009760
Extractions: The vestibulo-ocular reflex influences vision during natural movement much more than is generally appreciated, and it is capable of subtle and occasional profound influence on vision in aviation. Most physicians or physiologists think of nystagmus, an oculomotor pattern which occurs in certain unnatural motion profiles and in pathologic states, in relation to vestibular stimulation, but nystagmus is probably the least typical form of the vestibulo-ocular reflex in healthy individuals during natural movement. A more common oculomotor response consists of nearly smooth, sinusoidal eye oscillations that almost perfectly compensate for head oscillations that occur during walking, running, or simply shaking one's head, as in signifying "yes" or "no. "For example, in the latter situation as the head turns right, the eye turns left, thereby compensating for the head movement (cf. , Benson 1972). Gresty and Benson (in preparation) describe fairly high-frequency components (in the range 1 to 10 Hz) in angular oscillations of the head during whole-body movement and also in aircraft. It is important to note that the visual system is very poor at tracking Earth-fixed targets at these frequencies if it is unaided by the vestibulo-ocular reflex. Therefore, this reflex plays an important role in stabilizing vision relative to the Earth during many kinds of natural motion. The reader can demonstrate this to himself by holding his head
OCULAR FIXATION The fixation index is the ratio of nystagmus peak slowphase velocity with of fixation suppression a pathologic effect of vision on caloric nystagmus. http://www.dizziness-and-balance.com/practice/fixation.html
Extractions: TESTING OF FIXATION SUPPRESSION Please read our Timothy C. Hain, MD Impaired Fixation Suppression The diagnosis of impaired fixation suppression is made by observing the effect of asking the subject to fix his eyes upon a clearly visible target, upon any ongoing nystagmus.The most commonly used test procedure is one described by Albert (1974). For at least one left and right-beating response (generally a caloric response), the patients nystagmus is recorded until shortly after the peak. At that time the examiner tells the patient ot open the eyes and fixat a small target for about 10 seconds. The fixation index is the ratio of nystagmus peak slow-phase velocity with fixation to nystagmus intensity with fixation removed (e.g. complete darkness or eyes closed). This number is often computed into a percentage by multiplying it by 100. Fixation suppression can also be easily calculate from rotatory chair tests by having the subject track a chair fixed laser projected on a wall. There is evidence that there are multiple systems that participate in fixation suppression. Smooth pursuit can be used to suppress nystagmus, and some investigators have suggested that fixation suppression is redundant with the pursuit test. However, others have found that a different system, the "vestibular cancellation system", can also contribute to suppression (e.g. Tomlinson and Robinson, 1981)
Extractions: Ophthalmology JORGE C. KATTAH and MEENA GUJRATI University of Illinois College of Medicine at Peoria and Illinois Neurological Institute at OSF Saint Francis Medical Center, Peoria, Illinois 61637, USA Address for correspondence: Jorge C. Kattah, M.D., Department of Neurology, University of Illinois College of Medicine at Peoria, 530 N.E. Glen Oak Ave., Peoria, IL 61637 USA. Voice: 309-655-2702; fax: 309-655-3069.
ANNALS ONLINE -- Sign In Page Downbeat nystagmus and Cerebellar Ataxia Clinical and pathologic Findings Positional downbeat nystagmus (PDBN) has been recognized as a frequent http://www.annalsnyas.org/cgi/content/full/1039/1/540
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Publication Balancing the caloricinduced nystagmus velocity with cold air and water. Cold; Female; Human; Male; etiology nystagmus, pathologic; Temperature; Water http://www.psych-sci.manchester.ac.uk/research/PubDetails/index.aspx?ID=16119
Extractions: Gateway to the National Library of Medicine Try a search in the search box above - The NLM Gateway searches multiple retrieval systems at the U.S. National Library of Medicine. The resources the Gateway searches include consumer health information, journal citations, the NLM library catalogue, and meeting abstracts. Dynamics of torsional optokinetic nystagmus under altered gravitoinertial forces. Cheung BS, Money KE, Howard IP. Aviat Space Environ Med. 1993 May; 64: 424. Defence and Civil Institute of Environmental Medicine, Ontario, Canada. Publication Types: Keywords: Secondary Source ID: UI: 95607629 From Meeting Abstracts
Extractions: Gateway to the National Library of Medicine Try a search in the search box above - The NLM Gateway searches multiple retrieval systems at the U.S. National Library of Medicine. The resources the Gateway searches include consumer health information, journal citations, the NLM library catalogue, and meeting abstracts. Effects of microgravity on the interaction of vestibular and optokinetic nystagmus in the vertical plane. Clement G, Wood SJ, Reschke MF. Aviat Space Environ Med. 1991 May; 62: 473. Universities Space Research Institution, Houston, TX. Publication Types: Keywords: Secondary Source ID: UI: 95607622 From Meeting Abstracts
