| Development of hemispheric specialization for lexical pitch-accent in Japanese infants. | |
| | |
MedLine Citation:
|
PMID: 19925204 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Infants' speech perception abilities change through the first year of life, from broad sensitivity to a wide range of speech contrasts to becoming more finely attuned to their native language. What remains unclear, however, is how this perceptual change relates to brain responses to native language contrasts in terms of the functional specialization of the left and right hemispheres. Here, to elucidate the developmental changes in functional lateralization accompanying this perceptual change, we conducted two experiments on Japanese infants using Japanese lexical pitch-accent, which changes word meanings with the pitch pattern within words. In the first behavioral experiment, using visual habituation, we confirmed that infants at both 4 and 10 months have sensitivities to the lexical pitch-accent pattern change embedded in disyllabic words. In the second experiment, near-infrared spectroscopy was used to measure cortical hemodynamic responses in the left and right hemispheres to the same lexical pitch-accent pattern changes and their pure tone counterparts. We found that brain responses to the pitch change within words differed between 4- and 10-month-old infants in terms of functional lateralization: Left hemisphere dominance for the perception of the pitch change embedded in words was seen only in the 10-month-olds. These results suggest that the perceptual change in Japanese lexical pitch-accent may be related to a shift in functional lateralization from bilateral to left hemisphere dominance. |
| | |
Authors:
|
Yutaka Sato; Yuko Sogabe; Reiko Mazuka |
Related Documents
:
|
8131654 - The categorization of above and below spatial relations by young infants. 18472214 - Olfactory lateralization: odor intensity but not the hedonic estimation is lateralized. 3342714 - Infant imitation and memory: nine-month-olds in immediate and deferred tests. 7641524 - Infants' detection of the sound patterns of words in fluent speech. 90374 - Early psychosomatic pathology. 4504334 - Gyrinidal: a sesquiterpenoid aldehyde from the defensive glands of gyrinid beetles. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Journal of cognitive neuroscience Volume: 22 ISSN: 1530-8898 ISO Abbreviation: J Cogn Neurosci Publication Date: 2010 Nov |
Date Detail:
|
Created Date: 2010-07-16 Completed Date: 2010-11-10 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8910747 Medline TA: J Cogn Neurosci Country: United States |
Other Details:
|
Languages: eng Pagination: 2503-13 Citation Subset: IM |
Affiliation:
|
Laboratory for Language Development, RIKEN Brain Science Institute, Wako-shi, Saitama, Japan. satoyu@brain.riken.jp |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Acoustic Stimulation
/
methods Age Factors Analysis of Variance Asian Continental Ancestry Group Brain Mapping* Cerebral Cortex / anatomy & histology, metabolism, physiology* Dominance, Cerebral / physiology* Female Hemoglobins / metabolism Humans Infant Language* Male Pitch Perception / physiology* Reaction Time / physiology Spectroscopy, Near-Infrared / methods Time Factors |
| Chemical | |
Reg. No./Substance:
|
0/Hemoglobins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Music and speech listening enhance the recovery of early sensory processing after stroke.
Next Document: Ebbinghaus Revisited: Influences of the BDNF Val66Met Polymorphism on Backward Serial Recall Are Mod...