Hippus

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). Computerized analysis of pupillograms in studies of alertness. "Investigative Ophthalmology and Visual Science, 33", 671-6.] Cassin, B. and Solomon, S. "Dictionary of Eye Terminology". Gainsville, Florida: Triad Publishing Company, 1990.] . Pupillary hippus comes from the Greek "hippos" meaning horse, perhaps due to the rhythm of the contractions representing a galloping horseBeatty, J., & Lucero-Wagoner, B. (2000). The pupillary system. In J. T. Cacioppo, L. G. Tassinary & G. G. Bernston (Eds.), "The handbook of psychophysiology" (2nd ed.) (pp. 142-162). USA: Cambridge University Press.] .

It is particularly noticeable when pupil function is tested with a light, but is independent of eye movements or changes in illumination. It is usually normal, however pathological hippus can occur.

Hippus has been classically been noted as sign of Aconite poisoning. [4]

References

4. Forensic and State Medicine: Reddy


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  • 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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