title: Positional suppression of periodic alternating nystagmus.
abstract: A 43-year-old man with a high-grade glioma involving the cerebellar nodulus showed a near-complete suppression of periodic alternating nystagmus (PAN) in the lateral decubitus position to either side. This positional modulation of PAN is consistent with suppression of the velocity storage mechanism by head position changes (tilt dumping) and is supportive of the role of the velocity storage mechanism in generating PAN.
authors.affiliation: Department of Neurology (SJC), Yonsei University College of Medicine, Seoul, Korea; Department of Neurology (S-HP, J-SK, SWO, HJK, JHP, YEH), Seoul National University Bundang Hospital, Seongnam-si, Korea; and Department of Neurology (S-HP, J-SK), Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Seok Jong
authors.initials: SJ
authors.lastname: Chung
authors.forename: Seong-Ho
authors.initials: SH
authors.lastname: Park
authors.forename: Ji-Soo
authors.initials: JS
authors.lastname: Kim
authors.forename: Sea Won
authors.initials: SW
authors.lastname: Oh
authors.forename: Hyo Jung
authors.initials: HJ
authors.lastname: Kim
authors.forename: Jae Han
authors.initials: JH
authors.lastname: Park
authors.forename: Young Eun
authors.initials: YE
authors.lastname: Huh
mesh_terms: D000328:Adult; D001932:Brain Neoplasms / Q000150:complications*; D005910:Glioma / Q000150:complications*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009759:Nystagmus, Pathologic / Q000209:etiology*; D049268:Positron-Emission Tomography