Results 141 to 150 of about 17,258 (175)

Structural and functional MRIs disclose cerebellar pathologies in idiopathic downbeat nystagmus

Neurology, 2007
Neurologic disorders in which the etiology and pathogenesis are not yet understood are termed idiopathic. Downbeat nystagmus (DBN) is a frequent eye movement disorder that clinically manifests with oscillopsia and postural instability. Forty percent of patients with DBN are classified as having idiopathic DBN, because no underlying pathology can be ...
K, Hüfner, T, Stephan, R, Kalla, A, Deutschländer, J, Wagner, M, Holtmannspötter, G, Schulte-Altedorneburg, M, Strupp, T, Brandt, S, Glasauer   +9 more
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Familial Positional Downbeat Nystagmus and Cerebellar Ataxia: Clinical and Pathologic Findings

Annals of the New York Academy of Sciences, 2005
Abstract: A family with progressive cerebellar ataxia is reported. The earlier signs of cerebellar dysfunction was positional downbeat nystagmus (PDBN). An autopsy of one member with PDBN, who died early in the disease of unrelated causes, showed loss of Purkinje cells primarily in the nodulus.
Jorge C, Kattah, Meena, Gujrati
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Eye tracker based method for quantitative analysis of pathological nystagmus

2011 24th International Symposium on Computer-Based Medical Systems (CBMS), 2011
In this paper we propose a method for quantitative assessment of pathological nystagmus by using eye gaze data recorded with an eye tracker (Tobii T60). In detail, we use data acquired while patients perform two tests, the smooth pursuit and the saccadic movement test (implemented on the Tobii T60 using its API), that may indicate altered ophthalmic ...
GIORDANO, Daniela, Pino C, SPAMPINATO, CONCETTO, Di Pietro M, Reibaldi A.   +4 more
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Clinical implications of head‐shaking nystagmus in central and peripheral vestibular disorders: is perverted head‐shaking nystagmus specific for central vestibular pathology?

European Journal of Neurology, 2020
AbstractBackground and purposeThe patterns of head‐shaking nystagmus (HSN) aid in differentiation between central and peripheral vestibular disorders, and perverted HSN (pHSN) has been considered a central sign. The aim was to determine the characteristics of HSN in a large number of patients with either peripheral or central vestibular disorders in a ...
T.‐H. Yang, J.‐H. Lee, S.‐Y. Oh, J.‐J. Kang, J.‐S. Kim, M. Dieterich   +5 more
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Persistent geotropic nystagmus—a different kind of cupular pathology and its localizing signs

Acta Oto-Laryngologica, 2006
A persistent geotropic positional nystagmus indicates a dysfunction in the lateral semicircular canal with a cupula of less specific weight than the surrounding endolymph. It is possible to determine the side of the affected cupula by recording the nystagmus pattern in yaw and pitch plane.To identify the clinical features in patients with a persistent ...
Johan, Bergenius, Tatjana, Tomanovic
openaire   +2 more sources

The role of regularity and synchrony of cerebellar Purkinje cells for pathological nystagmus

Annals of the New York Academy of Sciences, 2011
Previous theories assumed that the beneficial effect of the potassium channel blocker 4‐aminopyridine (4‐AP) for patients suffering from downbeat nystagmus (DBN) or episodic ataxia type 2 (EA2) is due to an increase of excitability of cerebellar Purkinje cells (PC).
Stefan, Glasauer, Christian, Rössert, Michael, Strupp   +2 more
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[Pathologic nystagmus and related phenomena. A review].

Der Nervenarzt, 1985
Pathological nystagmus may be spontaneous, positional, or gaze-evoked. Peripheral vestibular nystagmus is usually rotatory, the horizontal component being most prominent. It is - in contrast to a central vestibular nystagmus - strongly inhibited by fixation.
S, Biedert, R, Reuther
openaire   +1 more source

[Physiologic and pathologic rebound nystagmus. Description and comparison].

Fortschritte der Ophthalmologie : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft, 1991
Using a binocular, infrared charged coupled device (CCD), an eye tracker coupled with an Olivetti M24 PC (resolution up to 0.1 degrees, scanning with 80 frames/s), the eye movements of 20 normal individuals with normal visual acuity and binocular function were recorded to detect physiological endpoint (EPN) and rebound nystagmus (RN).
F, Wild, J, Shallo-Hoffmann, H, Mühlendyck   +2 more
openaire   +1 more source

Downbeat nystagmus and pathology at cervicomedullary junction

Neurology, 1981
José Biller, Ralph J. Pagano
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Case report: Horizontal nystagmus in dix-hallpike test indicate which semicircular canal pathology?

2021
Benign Paroksismal Pozisyonel Vertigo (BPPV), baş hareketleri ile meydana gelen kısa süreli baş dönmesi ve nistagmuslar ile karakterize periferik vestibüler bir hastalıktır. Pozisyonel tanı testleri uygulanarak provoke edilen nistagmusların karakteristik özelliklerine göre tanı konulur ve tanıya uygun repozisyon manevrası belirlenerek tedavi edilir ...
ÇOLAK, Sanem Can, ÖZDEMİR, Emre Akgün, KOÇ, Özge, CENGİZ, Deniz Uğur, DEMİR, İsmail   +4 more
openaire   +1 more source