Representation of spectro-temporal features of spoken words within the P1-N1-P2 and T-complex of the auditory evoked potentials (AEP). (12th February 2016)

• Record Type: Journal Article
• Authors: Wagner, Monica; Roychoudhury, Arindam; Campanelli, Luca; Shafer, Valerie L; Martin, Brett; Steinschneider, Mitchell
• Is Part Of: Neuroscience letters. Volume 614(2016)
• Page Start: 119
• Page End: 126
• Publication Date: 2016-02-12
• Subjects: P1-N1-P2 -- T-complex -- Auditory evoked potentials (AEP) -- Spectral processing -- Temporal processing -- Single trial analysis; Neurology -- Periodicals; Neurology -- Periodicals; Research -- Periodicals; Neurologie -- Périodiques; Neuroanatomie -- Périodiques; Neuropharmacologie -- Périodiques; Neurophysiologie -- Périodiques; Neurology; Periodicals; Electronic journals; 617.48
• DOI: 10.1016/j.neulet.2015.12.020
• Languages: English
• ISSNs: 0304-3940

Abstract

Highlights: P1-N1-P2 and T-complex reflect spectral and temporal features of natural speech. P1-N1-P2 and T-complex are reliable despite multiple productions of natural speech. Single trial responses within sensory waveforms are stable between 50 through 600 ms. 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.