hippus

Intermittent pupillary dilation and constriction, independent of illumination, convergence, or psychic stimuli. [G. hippos, horse, from a fancied suggestion of galloping movements]
- respiratory h. dilation of the pupils occurring during forced, voluntary inspiration, and contraction during expiration.

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hip·pus 'hip-əs n a spasmodic variation in the size of the pupil of the eye caused by a tremor of the iris

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n.
abnormal rhythmical variations in the size of the pupils, independent of the intensity of the light falling on the eyes. It is occasionally seen in various diseases of the nervous system.

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hip·pus (hipґəs) [Gr. hippos] abnormally exaggerated rhythmic contraction and dilation of the pupil, independent of changes in illumination or in fixation of the eyes; called also pupillary athetosis.

Medical dictionary. 2011.

Look at other dictionaries:

  • Hippus — Hippus, also known as pupillary athetosis, is spasmodic, rhythmic (< 0.04 Hz), but irregular dilating and contracting pupillary movements between the sphincter and dilator musclesMcLaren, J. W., Erie, J. C. and Brubaker, R. F. (1992).… …   Wikipedia

  • hippus — HÍPPUS s. n. alternare bruscă de contracţie şi dilataţie a pupilei, care se produce independent de lumină. (< fr. hippus) Trimis de raduborza, 15.09.2007. Sursa: MDN …   Dicționar Român

  • Hippus — (v. gr.), 1) so v.w. Blinzeln od. Augenlidkrampf; 2) zitternde Bewegung der Regenbogenhaut …   Pierer's Universal-Lexikon

  • Hippus — (grch.), Krampf der Regenbogenhaut mit rasch wechselnder Verengerung und Erweiterung der Pupille …   Kleines Konversations-Lexikon

  • hippus — espasmo clónico del iris consistente en respuesta pupilar exagerada ante estímulos luminosos o de convergencia. Atetosis pupilar [ICD 10: H57.0] Diccionario ilustrado de Términos Médicos.. Alvaro Galiano. 2010 …   Diccionario médico

  • hippus — ● hippus nom masculin Série de rétrécissements (myosis) et de dilatations (mydriase) de la pupille, se produisant d une manière rythmique …   Encyclopédie Universelle

  • HIPPUS — fluv. Moscorum in Phasim defluens. Strabo l. 11. p. 498. et 500. Item ins. Eretriae, et urbs Siciliae, ac alia Palaestinae, Steph. Gent. Hippenos et Hippinus …   Hofmann J. Lexicon universale

  • HIPPUS — HIPPUS, усиленная форма неспокойного состояния зрачков. Даже в нормальном состоянии, вследствие воздействия различных возбуждений, зрачки никогда, за исключением сна, не находятся в покое. Зрачковый край радужки совершает все время медленные и… …   Большая медицинская энциклопедия

  • -hippus — [hip′əs] [ModL < Gr hippos: see HIPPO ] combining form forming nouns horse [eohippus] …   English World dictionary

  • Hippus — Mit Hippus (hippos griech.: Pferd Synonym: springende Pupille) wird in der Augenheilkunde eine seltene, teils ausgeprägte Unruhe der Pupille bezeichnet, die sich in einer rhythmischen Erweiterung oder Verengung äußert. Diese kann sowohl… …   Deutsch Wikipedia

  • hippus — meso·hippus; para·hippus; …   English syllables

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