title: Visual event-related potential (P300): a normative study.
abstract: The P300 component of the Event-Related Potential (ERP) is a general measurement of "cognitive efficiency". It is an index of the ability of an individual's Central Nervous System (CNS) to process incoming information.
  
  
  OBJECTIVE
  To develop a normative database for the visual P300.
  
  
  METHODS
  30 right-handed individuals (same number of each sex), between 20 and 30 years of age, healthy, free of any cognitive impairment and not making use of psychoactive substances. Participants were submitted to a visual discrimination task, which employed the "oddball" paradigm.
  
  
  RESULTS
  The expected scalp distribution trend was seen for latency but not for amplitude values.
  
  
  CONCLUSIONS
  A high variability of latency and amplitude values was observed across the age span. Mean reaction time for the entire sample of the study was 391.56 +/- 37.03 ms.
authors.affiliation: Laboratório de Mapeamento Cerebral e Integração Sensório-Motora, Instituto de Psiquiatria (IPUB), Universidade Federal do Rio de Janeiro RJ, Brazil. heloisaveiga@hotmail.com
authors.forename: Heloisa
authors.initials: H
authors.lastname: Veiga
authors.forename: Andréa
authors.initials: A
authors.lastname: Deslandes
authors.forename: Maurício
authors.initials: M
authors.lastname: Cagy
authors.forename: Kaleb
authors.initials: K
authors.lastname: McDowell
authors.forename: Fernando
authors.initials: F
authors.lastname: Pompeu
authors.forename: Roberto
authors.initials: R
authors.lastname: Piedade
authors.forename: Pedro
authors.initials: P
authors.lastname: Ribeiro
mesh_terms: D000328:Adult; D017677:Age Distribution; D000704:Analysis of Variance; D004566:Electrodes; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D011930:Reaction Time