Yury Shtyrov

Noise affects speech-signal processing differently in the cerebral hemispheres: Neuroreport

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

This study explored the effects of acoustic noise on the cerebral asymmetry of speech perception. We measured magnetic fields of the brain elicited by consonant-vowel syllables in silence and white noise. Background noise affected brain responses to these stimuli differently in the left and right auditory cortices. Its depressive effect on cortical responses was found mainly in the left hemisphere, whereas the right hemisphere was unaffected or exhibited increased activity in noise. Locations of the P1, N1, and P2 activity sources in noise were different from those in silence in the right but not in the left hemisphere. These results suggest an increased right hemisphere role in speech sound processing in noisy conditions, involving the recruitment of additional right auditory cortex structures.
Original languageEnglish
Pages (from-to)2189-2192
Number of pages4
Publication statusPublished - 1999
Externally publishedYes

    Research areas

  • Adult Analysis of Variance Evoked Potentials, Auditory/physiology Functional Laterality/*physiology Humans Magnetoencephalography Male Mental Processes/*physiology *Noise Reaction Time/physiology Speech Perception/*physiology

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