title: [Comparison of the basic characters of speech-evoked auditory brainstem response between school-age children and young adults].
abstract: OBJECTIVE
  The aim of this study was to compare the basic characters of the speech-evoked auditory brainstem response (speech-ABR) between young adults and school-age children.
  
  
  METHODS
  Speech-ABR of thirty eight normal hearing subjects including eighteen school-age children and twenty young adults were recorded. The speech syllable/da/as stimulus sound was transmitted to right ear by insertion the earphones in speech-ABR test.
  
  
  RESULTS
  Response waves of speech-ABR in school-age children were similar to those in young adults, which contained the onset response (peak V and A), the transition (peak C), the frequency following responses (peak D, E and F) and the offset response (peak O). Both the latency and amplitude showed no significant difference in all waves between young adults and school-age children, except the latency of wave O and amplitude of wave F. The latency of O wave in school-age children (47.80 ± 0.38) ms were significantly shorter than that in adults (48.10 ± 0.40) ms (t = 2.330,P = 0.026). The amplitude of F wave in school-age children (-0.21 ± 0.15) µV were significantly larger than that in adults (-0.12 ± 0.08) µV (t = 2.146,P = 0.043).
  
  
  CONCLUSIONS
  Both the latency and amplitude of the speech ABR in school age children at 6 - 11 years old show the great similarity with the young adults, which indicate that the ability of speech processing of brainstem in children has completely reached maturity.
authors.affiliation: Department of Otorhinolaryngology Head and Neck Surgery, Capital Medical University, Beijing, China.
authors.forename: Jin-feng
authors.initials: JF
authors.lastname: Liu
authors.forename: Ning-yu
authors.initials: NY
authors.lastname: Wang
authors.forename: Xin
authors.initials: X
authors.lastname: Fu
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Jin-lan
authors.initials: JL
authors.lastname: Li
authors.forename: Xiao-hui
authors.initials: XH
authors.lastname: Wen
authors.forename: Hong-yu
authors.initials: HY
authors.lastname: Zhang
mesh_terms: D000328:Adult; D002648:Child; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D013060:Speech; D055815:Young Adult