title: The relation between visual hallucinations and visual evoked potential in Parkinson disease.
abstract: OBJECTIVE
  The pathophysiology of hallucinations in Parkinson disease is poorly understood. This study investigated the relation between visual hallucination and visual evoked potentials (VEPs) in Parkinson disease.
  
  
  METHODS
  Nineteen patients with Parkinson disease were studied. The authors divided patients into 2 groups: patients with visual hallucinations (VH group) and those without visual hallucinations (no-VH group). VEPs using a checkerboard stimulus were recorded under a drug-free state.
  
  
  RESULTS
  On multivariate regression analysis, only the average P100 latency was selected and remained significant after the backward elimination method.
  
  
  CONCLUSIONS
  The authors demonstrated a close association between visual hallucinations and elongated VEP latency in Parkinson disease. VEPs may become one of the predictors for visual hallucination.
authors.affiliation: Department of Neurology, Sumitomo Hospital, Osaka, Japan. matsui-hideaki@sumitomo-hp.or.jp
authors.forename: Hideaki
authors.initials: H
authors.lastname: Matsui
authors.forename: Fukashi
authors.initials: F
authors.lastname: Udaka
authors.forename: Akiko
authors.initials: A
authors.lastname: Tamura
authors.forename: Masaya
authors.initials: M
authors.lastname: Oda
authors.forename: Tamotsu
authors.initials: T
authors.lastname: Kubori
authors.forename: Kazuto
authors.initials: K
authors.lastname: Nishinaka
authors.forename: Masakuni
authors.initials: M
authors.lastname: Kameyama
mesh_terms: D000368:Aged; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D006212:Hallucinations / Q000150:complications / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000150:complications / Q000503:physiopathology*; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology / Q000528:radiation effects