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Functional Hemispheric Specialization in Processing Phonemic and Prosodic Auditory Changes in Neonates
This study focuses on the early cerebral base of speech perception by examining functional lateralization in neonates for processing segmental and suprasegmental features of speech. For this purpose, auditory evoked responses of full-term neonates to phonemic and prosodic contrasts were measured in...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Research Foundation
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3173826/ https://www.ncbi.nlm.nih.gov/pubmed/21954386 http://dx.doi.org/10.3389/fpsyg.2011.00202 |
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author | Arimitsu, Takeshi Uchida-Ota, Mariko Yagihashi, Tatsuhiko Kojima, Shozo Watanabe, Shigeru Hokuto, Isamu Ikeda, Kazushige Takahashi, Takao Minagawa-Kawai, Yasuyo |
author_facet | Arimitsu, Takeshi Uchida-Ota, Mariko Yagihashi, Tatsuhiko Kojima, Shozo Watanabe, Shigeru Hokuto, Isamu Ikeda, Kazushige Takahashi, Takao Minagawa-Kawai, Yasuyo |
author_sort | Arimitsu, Takeshi |
collection | PubMed |
description | This study focuses on the early cerebral base of speech perception by examining functional lateralization in neonates for processing segmental and suprasegmental features of speech. For this purpose, auditory evoked responses of full-term neonates to phonemic and prosodic contrasts were measured in their temporal area and part of the frontal and parietal areas using near-infrared spectroscopy (NIRS). Stimuli used here were phonemic contrast /itta/ and /itte/ and prosodic contrast of declarative and interrogative forms /itta/ and /itta?/. The results showed clear hemodynamic responses to both phonemic and prosodic changes in the temporal areas and part of the parietal and frontal regions. In particular, significantly higher hemoglobin (Hb) changes were observed for the prosodic change in the right temporal area than for that in the left one, whereas Hb responses to the vowel change were similarly elicited in bilateral temporal areas. However, Hb responses to the vowel contrast were asymmetrical in the parietal area (around supra marginal gyrus), with stronger activation in the left. These results suggest a specialized function of the right hemisphere in prosody processing, which is already present in neonates. The parietal activities during phonemic processing were discussed in relation to verbal-auditory short-term memory. On the basis of this study and previous studies on older infants, the developmental process of functional lateralization from birth to 2 years of age for vowel and prosody was summarized. |
format | Online Article Text |
id | pubmed-3173826 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Frontiers Research Foundation |
record_format | MEDLINE/PubMed |
spelling | pubmed-31738262011-09-27 Functional Hemispheric Specialization in Processing Phonemic and Prosodic Auditory Changes in Neonates Arimitsu, Takeshi Uchida-Ota, Mariko Yagihashi, Tatsuhiko Kojima, Shozo Watanabe, Shigeru Hokuto, Isamu Ikeda, Kazushige Takahashi, Takao Minagawa-Kawai, Yasuyo Front Psychol Psychology This study focuses on the early cerebral base of speech perception by examining functional lateralization in neonates for processing segmental and suprasegmental features of speech. For this purpose, auditory evoked responses of full-term neonates to phonemic and prosodic contrasts were measured in their temporal area and part of the frontal and parietal areas using near-infrared spectroscopy (NIRS). Stimuli used here were phonemic contrast /itta/ and /itte/ and prosodic contrast of declarative and interrogative forms /itta/ and /itta?/. The results showed clear hemodynamic responses to both phonemic and prosodic changes in the temporal areas and part of the parietal and frontal regions. In particular, significantly higher hemoglobin (Hb) changes were observed for the prosodic change in the right temporal area than for that in the left one, whereas Hb responses to the vowel change were similarly elicited in bilateral temporal areas. However, Hb responses to the vowel contrast were asymmetrical in the parietal area (around supra marginal gyrus), with stronger activation in the left. These results suggest a specialized function of the right hemisphere in prosody processing, which is already present in neonates. The parietal activities during phonemic processing were discussed in relation to verbal-auditory short-term memory. On the basis of this study and previous studies on older infants, the developmental process of functional lateralization from birth to 2 years of age for vowel and prosody was summarized. Frontiers Research Foundation 2011-09-15 /pmc/articles/PMC3173826/ /pubmed/21954386 http://dx.doi.org/10.3389/fpsyg.2011.00202 Text en Copyright © 2011 Arimitsu, Uchida-Ota, Yagihashi, Kojima, Watanabe, Hokuto, Ikeda, Takahashi and Minagawa-Kawai. http://www.frontiersin.org/licenseagreement This is an open-access article subject to a non-exclusive license between the authors and Frontiers Media SA, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and other Frontiers conditions are complied with. |
spellingShingle | Psychology Arimitsu, Takeshi Uchida-Ota, Mariko Yagihashi, Tatsuhiko Kojima, Shozo Watanabe, Shigeru Hokuto, Isamu Ikeda, Kazushige Takahashi, Takao Minagawa-Kawai, Yasuyo Functional Hemispheric Specialization in Processing Phonemic and Prosodic Auditory Changes in Neonates |
title | Functional Hemispheric Specialization in Processing Phonemic and Prosodic Auditory Changes in Neonates |
title_full | Functional Hemispheric Specialization in Processing Phonemic and Prosodic Auditory Changes in Neonates |
title_fullStr | Functional Hemispheric Specialization in Processing Phonemic and Prosodic Auditory Changes in Neonates |
title_full_unstemmed | Functional Hemispheric Specialization in Processing Phonemic and Prosodic Auditory Changes in Neonates |
title_short | Functional Hemispheric Specialization in Processing Phonemic and Prosodic Auditory Changes in Neonates |
title_sort | functional hemispheric specialization in processing phonemic and prosodic auditory changes in neonates |
topic | Psychology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3173826/ https://www.ncbi.nlm.nih.gov/pubmed/21954386 http://dx.doi.org/10.3389/fpsyg.2011.00202 |
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