The influence of speech stimuli contrast in cortical auditory evoked potentials

Studies about cortical auditory evoked potentials using the speech stimuli in normal hearing individuals are important for understanding how the complexity of the stimulus influences the characteristics of the cortical potential generated. To characterize the cortical auditory evoked potential and t...

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Bibliographic Details
Published in:Brazilian journal of otorhinolaryngology 2013-05, Vol.79 (3), p.336-341
Main Authors: de Freitas Alvarenga, Kátia, Vicente, Leticia Cristina, Lopes, Raquel Caroline Ferreira, da Silva, Rubem Abrão, Banhara, Marcos Roberto, Lopes, Andréa Cintra, Jacob-Corteletti, Lilian Cássia Bornia
Format: Article
Language:English
Subjects:
Acoustic Stimulation - methods
Adolescent
Adult
audiology
auditory
Auditory Cortex - physiology
auditory pathways
Auditory Threshold - physiology
Child
Cohort Studies
electrophysiology
event-related potentials, P300
evoked potentials
Evoked Potentials, Auditory - physiology
Female
Humans
Male
Original
Prospective Studies
Reaction Time
Young Adult
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Summary:Studies about cortical auditory evoked potentials using the speech stimuli in normal hearing individuals are important for understanding how the complexity of the stimulus influences the characteristics of the cortical potential generated. To characterize the cortical auditory evoked potential and the P3 auditory cognitive potential with the vocalic and consonantal contrast stimuli in normally hearing individuals. 31 individuals with no risk for hearing, neurologic and language alterations, in the age range between 7 and 30 years, participated in this study. The cortical auditory evoked potentials and the P3 auditory cognitive one were recorded in the Fz and Cz active channels using consonantal (/ba/-/da/) and vocalic (/i/-/a/) speech contrasts. Design: A cross-sectional prospective cohort study. We found a statistically significant difference between the speech contrast used and the latencies of the N2 (p = 0.00) and P3 (p = 0.00) components, as well as between the active channel considered (Fz/Cz) and the P3 latency and amplitude values. These correlations did not occur for the exogenous components N1 and P2. The speech stimulus contrast, vocalic or consonantal, must be taken into account in the analysis of the cortical auditory evoked potential, N2 component, and auditory cognitive P3 potential.
ISSN:1808-8694
1808-8686
DOI:10.5935/1808-8694.20130059