Representation of spectro-temporal features of spoken words within the P1-N1-P2 and T-complex of the auditory evoked potentials (AEP)

Monica Wagner, Arindam Roychoudhury, Luca Campanelli, Valerie L. Shafer, Brett Martin, Mitchell Steinschneider

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6 Scopus citations

Abstract

The purpose of the study was to determine whether P1-N1-P2 and T-complex morphology reflect spectro-temporal features within spoken words that approximate the natural variation of a speaker and whether waveform morphology is reliable at group and individual levels, necessary for probing auditory deficits. The P1-N1-P2 and T-complex to the syllables /pət/ and /sət/ within 70 natural word productions each were examined. EEG was recorded while participants heard nonsense word pairs and performed a syllable identification task to the second word in the pairs. Single trial auditory evoked potentials (AEP) to the first words were analyzed. Results found P1-N1-P2 and T-complex to reflect spectral and temporal feature processing. Also, results identified preliminary benchmarks for single trial response variability for individual subjects for sensory processing between 50 and 600. ms. P1-N1-P2 and T-complex, at least at group level, may serve as phenotypic signatures to identify deficits in spectro-temporal feature recognition and to determine area of deficit, the superior temporal plane or lateral superior temporal gyrus.

Original languageEnglish (US)
Pages (from-to)119-126
Number of pages8
JournalNeuroscience Letters
Volume614
DOIs
StatePublished - Feb 12 2016

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Keywords

  • Auditory evoked potentials (AEP)
  • P1-N1-P2
  • Single trial analysis
  • Spectral processing
  • T-complex
  • Temporal processing

ASJC Scopus subject areas

  • Neuroscience(all)

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