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  • Title: Lateralization of speech processing in the brain as indicated by mismatch negativity and dichotic listening.
    Author: Shtyrov Y, Kujala T, Lyytinen H, Kujala J, Ilmoniemi RJ, Näätänen R.
    Journal: Brain Cogn; 2000; 43(1-3):392-8. PubMed ID: 10857733.
    Abstract:
    The goal of the present study was to evaluate the differences between dichotic listening and mismatch negativity as measures of speech lateralization in the human brain. For this purpose, we recorded the magnetic equivalent of the mismatch negativity, elicited by consonant-vowel syllable change, and tested the same subjects in the dichotic listening procedure. The results showed that both methods indicated left-hemisphere dominance in speech processing. However, the mismatch negativity, as compared to the right-ear advantage, suggested slightly stronger left-hemisphere dominance in speech processing. No clear correlation was found between the laterality indexes of mismatch negativity and right-ear advantage calculated from dichotic listening results. The possible explanation for this finding would be that these two measures reflect different stages of speech processing in the human brain.
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