PMID: 9185738Jun 1, 1997Paper

Positional vertigo and ageotropic bidirectional nystagmus

The Laryngoscope
Augusto P CasaniG P Luigi

Abstract

A strong paroxysmal positional horizontal nystagmus accompanied by symptoms similar to those of paroxysmal positional vertigo (PPV) can be observed in a small fraction of patients who have positional vertigo. This nystagmus may be a lateral canal variant of PPV. We evaluated nine patients who had episodes of prolonged, intense positional vertigo provoked by lateral movements of the head while in the supine position. The nystagmus appeared as horizontal and was directed toward the uppermost ear (ageotropic) when the head was rotated to either side (bidirectional). The duration of nystagmus lasted more than 1 minute in all the cases, although it presented a progressive decrease in the velocity of the slow component. The clinical and electronystagmographic features of this syndrome lead us to propose a different form of horizontal canal PPV associated with a paroxysmal positional ageotropic and bidirectional nystagmus, probably caused by a "heavy cupula" as a result of deposits of extraneous bodies (otolithic?) or by a cupula denser than the endolymph.

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Citations

Jan 22, 2002·The Laryngoscope·Augusto P CasaniStefano Berrettini
Aug 3, 2011·International Journal of Otolaryngology·Paolo Vannucchi, Rudi Pecci
Jul 11, 2014·Current Treatment Options in Neurology·Daniel R GoldMichael C Schubert
Nov 16, 2013·European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·Toshiaki YamanakaHiroshi Hosoi
Mar 29, 2005·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Giuseppe Ciniglio AppianiGiuseppe Cuiuli
Dec 19, 2012·Auris, Nasus, Larynx·Eun Jin Son, Hun Yi Park
Dec 15, 2012·Auris, Nasus, Larynx·Alessandro De Stefano, Francesco Dispenza
Dec 4, 2012·International Journal of Pediatric Otorhinolaryngology·Naoki SakaMasafumi Sakagami
Aug 4, 2007·Annales d'oto-laryngologie et de chirurgie cervico faciale : bulletin de la Société d'oto-laryngologie des hôpitaux de Paris·P BertholonC Martin
Jun 1, 2016·The American Journal of Emergency Medicine·Giancarlo TirelliMargherita Tofanelli
Mar 11, 2005·The Annals of Otology, Rhinology, and Laryngology·Pierre BertholonChristian Martin
Sep 2, 2006·The Annals of Otology, Rhinology, and Laryngology·Pierre BertholonChristian Martin
Nov 22, 2005·Acta Oto-laryngologica·Bruno SchratzenstallerWolfgang Arnold
Apr 18, 2019·Journal of Neurophysiology·Helen S Cohen

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