Journal
BRAIN RESEARCH
Volume 1522, Issue -, Pages 31-37Publisher
ELSEVIER
DOI: 10.1016/j.brainres.2013.04.045
Keywords
Auditory-evoked potential (AEP); P1-N1-P2 complex; T-complex; Cross-linguistic; Phonetic; Speech perception
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Funding
- National Institute of Child Health and Human Development (NICHD) at the National Institutes of Health (NIH) [HD-46193]
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The influence of native-language experience on sensory-obligatory auditory-evoked potentials (AEPs) was investigated in native-English and native-Polish listeners. AEPs were recorded to the first word in nonsense word pairs, while participants performed a syllable identification task to the second word in the pairs. Nonsense words contained phoneme sequence onsets (i.e., /pt/, /p(sic)t/, /st/ and /s(sic)t/) that occur in the Polish and English languages, with the exception that /pt/ at syllable onset is an illegal phonotactic form in English. P1-N1-P2 waveforms from fronto-central electrode sites were comparable in English and Polish listeners, even though, these same English participants were unable to distinguish the nonsense words having /pt/ and /p(sic)t/ onsets. The P1-N1-P2 complex indexed the temporal characteristics of the word stimuli in the same manner for both language groups. Taken together, these findings suggest that the fronto-central P1-N1-P2 complex reflects acoustic feature processing of speech and is not significantly influenced by exposure to the phoneme sequences of the native-language. In contrast, the T-complex from bilateral posterior temporal sites was found to index phonological as well as acoustic feature processing to the nonsense word stimuli. An enhanced negativity for the /pt/ cluster relative to its contrast sequence (i.e., /p(sic)t/) occurred only for the Polish listeners, suggesting that neural networks within non-primary auditory cortex may be involved in early cortical phonological processing. (c) 2013 Elsevier B.V. All rights reserved.
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