nystagmus

nystagmus
n.
rapid involuntary movements of the eyes that may be from side to side, up and down, or rotatory. Nystagmus may be congenital and associated with poor sight; it also occurs in disorders of the part of the brain responsible for eye movements and their coordination (e.g. multiple sclerosis) and in disorders of the organ of balance in the ear or the associated parts of the brain. Optokinetic nystagmus occurs in normal people when they try to look at a succession of objects moving quickly across their line of sight. Jerking eye movements sometimes occur in normal people when tired, on concentrating their gaze in any direction. These are called nystagmoid jerks and they do not imply disease.

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  • Nystagmus — Horizontal optokinetic nystagmus, a normal (physiological) form of nystagmus ICD 10 H55, H81.4 …   Wikipedia

  • nystagmus — [ nistagmys ] n. m. • nystagme 1839; gr. nustagmos, de nustazein « baisser la tête » ♦ Méd. Secousses rythmiques involontaires des globes oculaires, survenant le plus souvent dans le regard latéral, lors de circonstances physiologiques… …   Encyclopédie Universelle

  • Nystagmus — (m), Augenzittern (n) eng nystagmus …   Arbeitssicherheit und Gesundheitsschutz Glossar

  • Nystagmus — Nys*tag mus, n. [NL., fr. Gr. ? drowsiness, fr. ? to nod in sleep, to slumber.] (Med.) A rapid involuntary oscillation of the eyeballs. [1913 Webster] …   The Collaborative International Dictionary of English

  • Nystágmus — Nystágmus, s. Augenzittern …   Meyers Großes Konversations-Lexikon

  • Nystágmus — (grch.), s. Augenzittern …   Kleines Konversations-Lexikon

  • nystagmus — (n.) medical Latin, from Gk. nystagmos nodding, drowsiness, from nystazein to nod, be sleepy, from PIE *sneud(h) to be sleepy …   Etymology dictionary

  • nystagmus — [ni stag′məs] n. [ModL < Gr nystagmos, drowsiness < nystazein, to be sleepy < IE base * sneud , to sleep] an involuntary, rapid movement of the eyeball, usually from side to side nystagmic adj …   English World dictionary

  • Nystagmus — Klassifikation nach ICD 10 H55 Nystagmus und sonstige abnorme Augenbewegungen …   Deutsch Wikipedia

  • Nystagmus — En médecine, le nystagmus est un mouvement d oscillation involontaire et saccadé du globe oculaire. Le nystagmus est une perturbation de la coordination des muscles de l œil. Il peut être causé par une pathologie, des mouvements très rapides ou l …   Wikipédia en Français

  • nystagmus — nystagmic, adj. /ni stag meuhs/, n. a congenital or acquired persistent, rapid, involuntary, and oscillatory movement of the eyeball, usually from side to side. [1815 25; < NL < Gk nystagmós nodding, deriv. of nystázein to nod] * * * ▪ physiology …   Universalium

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