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MEG detects neural consequences of anomalous nasalization in vowel-consonant pairs
Elissa J Flagg1, Janis E Oram Cardy, Timothy P L Roberts
1Department of Languages, Literatures and Linguistics, S546 Ross Building, York University, 4700 Keele Street, Toronto, Ont., Canada M3J 1P3. eflagg@yorku.ca
Abstract:
This study identifies a delay in the neuromagnetic activity evoked by passive auditory presentation of anomalous speech sound combinations. Vowel-consonant-vowel (VCV) stimuli were constructed to manipulate vowel nasalization in violation of the patterns of English, in which vowel nasalization ordinarily arises as a predictable coarticulatory effect of anticipatory velum lowering for production of a following nasal consonant. For anomalous stimuli with V1 and C mismatched in nasalization, the neural response to C was delayed relative to congruent control stimuli with V1 and C matched for nasalization. As both anomalous and control stimuli represent linguistically possible speech sound sequences, the temporal disparity in evoked neuromagnetic activity in English speakers reflects a role for language-specific phonological knowledge at the earliest stages of auditory processing.
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