Cerebral activation patterns of speech perception in 4-month-olds and adults
2009 (English)In: BrainTalk: Discourse with and in the Brain / [ed] Kai Alter, Merle Horne, Magnus Lindgren, Mikael Roll, Janne von Koss Torkildsen, Lund, Sweden: Centre for Languages and Literature, Lund University , 2009, 19- p.Chapter in book (Other (popular science, discussion, etc.))
Speech perception in infancy is language-general, but language-specific in adulthood. Is this reflected in event-related brain potentials (ERPs)? ERPs from 128 electrodes were recorded for three speech perception conditions in 4-month-old Swedish infants (N=9) and adults (N=13).The stimuli were simple sentences in infant-directed speech (IDS) in Swedish, familiar in semantic content and prosodic characteristics; in spectrally rotated Swedish with incomprehensible semantic content, but familiar prosodic characteristics; and in Portuguese, unfamiliar in both aspects.As predicted, infants show bilateral activation across conditions, but also present two left-hemispheric advantages as potential first signs of native language specialisation. In adults, left-hemispheric activation shows condition-sensitive ERP patterns: processing rotated Swedish is similar to Swedish, but different to Portuguese. The right-hemispheric dominance in adults is explained by the strong prosodic and weak semantic characteristics of the IDS stimuli. Infants' language-general and adults' language-specific speech perception is reflected in the ERPs, although 4-month-olds show first signs of specialisation.
Place, publisher, year, edition, pages
Lund, Sweden: Centre for Languages and Literature, Lund University , 2009. 19- p.
EEG, ERP, infants, lateralization, speech perception, language acquisition
General Language Studies and Linguistics
Research subject Linguistics
IdentifiersURN: urn:nbn:se:su:diva-17390ISBN: 978-91-633-5561-5OAI: oai:DiVA.org:su-17390DiVA: diva2:183911