title: [P300 event-related potentials in stutterers pre and post treatment: a pilot study].
abstract: BACKGROUND
  P300 event-related potential has been used as an instrument to establish the diagnosis of several disorders as well as to assess therapeutic outcomes.
  
  
  OBJECTIVE
  to investigate the relationship between stuttering amelioration and cerebral activity.
  
  
  METHODS
  P300 event-related potentials were obtained in three adult males, all stutterers, aged 20 to 31 years, pre and post-treatment, verifying changes in wave amplitude and latency between waves.
  
  
  RESULTS
  results indicate a significant positive correlation between the reduction in the percentage of stuttered syllables and the improvement in wave amplitude for the right ear.
  
  
  CONCLUSIONS
  stutterers can exhibit different patterns of interhemispheric activity with a tonal P300 task after undergoing a fluency-enhancing program.
authors.affiliation: Departamento de Fisioterapia, Fonoaudiologia e Terapia Ocupacional, Faculdade de Medicina, Universidade de São Paulo, São Paulo. clauan@usp.br
authors.forename: Claudia Regina Furquim de
authors.initials: CR
authors.lastname: Andrade
authors.forename: Fernanda Chiarion
authors.initials: FC
authors.lastname: Sassi
authors.forename: Carla Gentile
authors.initials: CG
authors.lastname: Matas
authors.forename: Ivone Ferreira
authors.initials: IF
authors.lastname: Neves
authors.forename: Vanessa Oliveira
authors.initials: VO
authors.lastname: Martins
mesh_terms: D000328:Adult; D001921:Brain / Q000502:physiology*; D002540:Cerebral Cortex; D004558:Electric Stimulation; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005072:Evoked Potentials, Auditory / Q000502:physiology; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D010865:Pilot Projects; D013060:Speech / Q000502:physiology; D013067:Speech Perception / Q000502:physiology; D013070:Speech Therapy; D013342:Stuttering / Q000503:physiopathology* / Q000628:therapy