title: Representation of spectro-temporal features of spoken words within the P1-N1-P2 and T-complex of the auditory evoked potentials (AEP).
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 600ms. 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.
authors.affiliation: St John's University, Queens, NY, USA. Electronic address: wagnerm@stjohns.edu.
authors.forename: Monica
authors.initials: M
authors.lastname: Wagner
authors.affiliation: Columbia University, New York, NY, USA.
authors.forename: Arindam
authors.initials: A
authors.lastname: Roychoudhury
authors.affiliation: The Graduate Center of the City University of New York, New York, NY, USA.
authors.forename: Luca
authors.initials: L
authors.lastname: Campanelli
authors.affiliation: The Graduate Center of the City University of New York, New York, NY, USA.
authors.forename: Valerie L
authors.initials: VL
authors.lastname: Shafer
authors.affiliation: The Graduate Center of the City University of New York, New York, NY, USA.
authors.forename: Brett
authors.initials: B
authors.lastname: Martin
authors.affiliation: Albert Einstein College of Medicine, Bronx, NY, USA.
authors.forename: Mitchell
authors.initials: M
authors.lastname: Steinschneider
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D004569:Electroencephalography; D005072:Evoked Potentials, Auditory; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D013067:Speech Perception / Q000502:physiology*; D013997:Time Factors; D055815:Young Adult
keywords: Auditory evoked potentials (AEP); P1-N1-P2; Single trial analysis; Spectral processing; T-complex; Temporal processing