Specificity of experience-dependent pitch representation in the brainstem

Neuroreport. 2006 Oct 23;17(15):1601-5. doi: 10.1097/01.wnr.0000236865.31705.3a.

Abstract

Crosslanguage comparisons of brainstem-evoked potentials have revealed experience-dependent plasticity in pitch representation for curvilinear f0 contours representative of Mandarin tones. To assess the tolerance limits of this experience-dependent selectivity, we evaluated cross-linguistically (Chinese, English) the pitch strength and tracking accuracy of linear rising and falling f0 ramps representative of Mandarin tones 2 and 4. No crosslanguage differences in pitch strength or accuracy were observed for either tone, indicating that stimuli with linear rising/falling ramps elicit homogeneous pitch representations at the level of the brainstem regardless of language experience. We conclude that pitch extraction at the brainstem level is critically dependent on specific dimensions of pitch contours that native speakers have been exposed to in natural speech contexts.

Publication types

  • Comparative Study
  • Evaluation Study
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acoustic Stimulation / methods
  • Adult
  • Analysis of Variance
  • Brain Stem / physiology*
  • Evoked Potentials, Auditory, Brain Stem / physiology
  • Female
  • Humans
  • Language*
  • Male
  • Pitch Discrimination / physiology*
  • Sensitivity and Specificity
  • Sound Spectrography / methods
  • Spectrum Analysis / methods
  • Speech Acoustics*
  • Speech Perception / physiology*