Open AccessPeripheral Downbeat Positional Nystagmus: Apogeotropic Posterior Canal or Anterior Canal BPPV
Author(s) -
Janet Odry Helminski
Publication year - 2019
Publication title -
journal of neurologic physical therapy
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.046
H-Index - 52
eISSN - 1557-0584
pISSN - 1557-0576
DOI - 10.1097/npt.0000000000000267
Subject(s) - benign paroxysmal positional vertigo , medicine , nystagmus , semicircular canal , orthodontics , anatomy , audiology , vertigo , vestibular system , surgery
Downbeat nystagmus (DBN) during the Dix-Hallpike test (DHT) suggests excitation of the anterior canal (AC) or inhibition of the posterior canal (PC) underlying benign paroxysmal positional vertigo (BPPV). This case series describes 2 individuals presenting with DBN in positional testing suggestive of a PC BPPV variant termed apogeotropic PC-BPPV and due to inhibition of the PC.