title: Brainstem auditory evoked potential with speech stimulus.
abstract: BACKGROUND
  Although clinical use of the click stimulus for the evaluation of brainstem auditory function is widespread, and despite the fact that several researchers use such stimulus in studies involving human hearing, little is known about the auditory processing of complex stimuli such as speech.
  
  
  OBJECTIVE
  To characterize the findings of the Auditory Brainstem Response (ABR) performed with speech stimuli in adults with typical development.
  
  
  METHODS
  Fifty subjects, 22 males and 28 females, with typical development, were assessed for ABR using both click and speech stimuli.
  
  
  RESULTS
  The latencies and amplitudes of the response components onset (V, A and complex VA), the area and slope that occur before 10 ms were identified and analyzed. These measurements were identified in all of the studied subjects and presented wave latency values (ms) of: V = 7.18 (SD = 1.08), A = 8.66 (SD = 1.13); Complex VA = 1.49 (SD = 0.43). For the wave amplitudes (µV), the values were: V = 0.29 (SD = 0.15), A = -0.3 (SD = 0.18); Complex VA = 0.58 (SD = 0. 25). The area measurements (µV X ms) and slope (µV / ms) were 0.27 (SD = 0.17) and 0.4 (SD = 0.17) respectively.
  
  
  CONCLUSIONS
  Based on the gathered data it can be observed that this potential works as a new tool for understanding the encoding of sound at the brainstem level.
authors.affiliation: Departamento de Fisioterapia, Fonoaudiologia e Terapia Ocupacional, Faculdade de Medicina, Universidade de São Paulo. carolrocha@usp.br
authors.forename: Caroline Nunes
authors.initials: CN
authors.lastname: Rocha
authors.forename: Renata
authors.initials: R
authors.lastname: Filippini
authors.forename: Renata Rodrigues
authors.initials: RR
authors.lastname: Moreira
authors.forename: Ivone Ferreira
authors.initials: IF
authors.lastname: Neves
authors.forename: Eliane
authors.initials: E
authors.lastname: Schochat
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods*; D000328:Adult; D001308:Auditory Perceptual Disorders / Q000503:physiopathology; D004594:Electrophysiology; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D011930:Reaction Time; D012016:Reference Values; D013063:Speech Discrimination Tests; D013067:Speech Perception / Q000502:physiology*; D013997:Time Factors