منابع مشابه
Light cupula: the pathophysiological basis of persistent geotropic positional nystagmus
OBJECTIVE To clarify the pathophysiological basis of persistent geotropic positional nystagmus (PGN) in patients with the horizontal canal type of benign paroxysmal positional vertigo (H-BPPV), the time constant (TC) of nystagmus and the relationship between its slow phase eye velocity (SPV) and the angle of head rotation in supine were defined. METHODS Geotropic or apogeotropic positional ny...
متن کاملPersistent positional nystagmus: a case of superior semicircular canal benign paroxysmal positional vertigo?
Involvement of the superior semicircular canal (SSC) in benign paroxysmal positional vertigo (BPPV) is rare. SSC BPPV is distinguished from the more common posterior semicircular canal (PSC) variant by the pattern of nystagmus triggered by the Dix-Hallpike position: down-beating torsional nystagmus in SSC BPPV versus up-beating torsional nystagmus in PSC BPPV. SSC BPPV may be readily treated at...
متن کاملPositional nystagmus of central origin.
Audiometric, electrophysiologic, and radiographic findings for a 68-year-old male with an "imbalance" concern are presented. This paper has a two-fold purpose: (1) to present an unusual electronystagmography case study and (2) to highlight the importance of test conditions in lesion localization. The specific disease pathophysiology remains obscure. Repeated hearing tests documented a known hea...
متن کاملPersistent Down-Beating Torsional Positional Nystagmus: Posterior Semicircular Canal Light Cupula?
A 16-year-old boy with rotatory positional vertigo and nausea, particularly when lying down, visited our clinic. Initially, we observed vertical/torsional (downward/leftward) nystagmus in the supine position, and it did not diminish. In the sitting position, nystagmus was not provoked. Neurological examinations were normal. We speculated that persistent torsional down-beating nystagmus was caus...
متن کاملPersistent Geotropic Direction-Changing Positional Nystagmus Treated With Transcutaneous Vagus Nerve Stimulation.
A 50-year-old female patient visited the emergency department of a university hospital complaining of sudden-onset vertigo. Symptoms initiatedwhile the patient was seated at a table andworsened whenever she moved her head. One month prior, the patient had been admitted to a hospital for 2 weeks for geotropic benign paroxysmal positional vertigo of the right lateral semicircular canal (LSCC). At...
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ژورنال
عنوان ژورنال: The Laryngoscope
سال: 2011
ISSN: 0023-852X
DOI: 10.1002/lary.21848