title: P300 with verbal and nonverbal stimuli in normal hearing adults.
abstract: The P300 results from focusing attention on rare stimuli in the midst of other frequent stimuli; it tests recent attention and memory, both of which depend on discriminating among verbal or nonverbal stimuli.
  
  
  OBJECTIVE
  To compare the P300 with verbal and nonverbal stimuli in normal-hearing adults.
  
  
  METHODS
  A prospective study was made of 15 male subjects aged from 22 to 55, with no hearing complaints. The subjects underwent short and long latency (P300) auditory evoked potentials with verbal and non-verbal stimuli.
  
  
  RESULTS
  The mean P300 latency with verbal stimuli was significantly higher than the P300 with nonverbal stimuli. The P300 amplitudes were significantly lower for verbal compared with non-verbal stimuli.
  
  
  CONCLUSIONS
  There were no differences between ears with respect to P300 latencies and amplitudes for both non-verbal and verbal stimuli. Latencies were higher with verbal stimuli; amplitudes had lower values.
authors.affiliation: 　Medical School, Sao Paulo University, FMUSP.
authors.forename: Camila Gonçalves Polo
authors.initials: CG
authors.lastname: Massa
authors.forename: Camila Maia
authors.initials: CM
authors.lastname: Rabelo
authors.forename: Carla Gentile
authors.initials: CG
authors.lastname: Matas
authors.forename: Eliane
authors.initials: E
authors.lastname: Schochat
authors.forename: Alessandra Giannella
authors.initials: AG
authors.lastname: Samelli
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods*; D000328:Adult; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011930:Reaction Time; D055815:Young Adult