Abstract
Infant's developmental changes in cerebral lateralization in response to speech stimuli were assessed using a multi-channel near infrared spectroscopic measurement system. Analysis-synthesized Japanese word stimuli were used as phoneme (/itta/ and /itte/) and pitch (/itta/ and /itta?/) contrasts. The baseline blocks contained only/itta/, whereas /itta/ and its phoneme or pitch counterpart were presented randomly with equal probability during the contrast blocks in each session. To analyze cerebral lateralization, we calculated laterality indices using maximal total-Hb changes during the contrast blocks in the left and right auditory areas. Significant differences were found in the laterality indices between phoneme and pitch sessions for the infant groups of 11-12 months and older, as well as for 2- to 5-year-old infants and adults. The results imply that cerebral dominance for processing speech is formed just before one year after birth in normal infants. The method used in this study can be used clinically as an objective test of language development for infants with increased risk in language development.
| Original language | English |
|---|---|
| Pages (from-to) | 165-171 |
| Number of pages | 7 |
| Journal | Japan Journal of Logopedics and Phoniatrics |
| Volume | 44 |
| Issue number | 3 |
| Publication status | Published - 2003 |
| Externally published | Yes |
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Keywords
- Auditory area
- Cerebral dominance
- Developmental test
- Language processing
- NIRS (near infrared spectroscopy)
ASJC Scopus subject areas
- LPN and LVN
- Speech and Hearing
Cite this
Developmental changes in cerebral lateralization during speech processing measured by near infrared spectroscopy. / Sato, Yutaka; Mori, Koichi; Furuya, Izumi; Hayashi, Ryoko; Minagawa, Yasuyo; Koizumi, Toshizo.
In: Japan Journal of Logopedics and Phoniatrics, Vol. 44, No. 3, 2003, p. 165-171.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Developmental changes in cerebral lateralization during speech processing measured by near infrared spectroscopy
AU - Sato, Yutaka
AU - Mori, Koichi
AU - Furuya, Izumi
AU - Hayashi, Ryoko
AU - Minagawa, Yasuyo
AU - Koizumi, Toshizo
PY - 2003
Y1 - 2003
N2 - Infant's developmental changes in cerebral lateralization in response to speech stimuli were assessed using a multi-channel near infrared spectroscopic measurement system. Analysis-synthesized Japanese word stimuli were used as phoneme (/itta/ and /itte/) and pitch (/itta/ and /itta?/) contrasts. The baseline blocks contained only/itta/, whereas /itta/ and its phoneme or pitch counterpart were presented randomly with equal probability during the contrast blocks in each session. To analyze cerebral lateralization, we calculated laterality indices using maximal total-Hb changes during the contrast blocks in the left and right auditory areas. Significant differences were found in the laterality indices between phoneme and pitch sessions for the infant groups of 11-12 months and older, as well as for 2- to 5-year-old infants and adults. The results imply that cerebral dominance for processing speech is formed just before one year after birth in normal infants. The method used in this study can be used clinically as an objective test of language development for infants with increased risk in language development.
AB - Infant's developmental changes in cerebral lateralization in response to speech stimuli were assessed using a multi-channel near infrared spectroscopic measurement system. Analysis-synthesized Japanese word stimuli were used as phoneme (/itta/ and /itte/) and pitch (/itta/ and /itta?/) contrasts. The baseline blocks contained only/itta/, whereas /itta/ and its phoneme or pitch counterpart were presented randomly with equal probability during the contrast blocks in each session. To analyze cerebral lateralization, we calculated laterality indices using maximal total-Hb changes during the contrast blocks in the left and right auditory areas. Significant differences were found in the laterality indices between phoneme and pitch sessions for the infant groups of 11-12 months and older, as well as for 2- to 5-year-old infants and adults. The results imply that cerebral dominance for processing speech is formed just before one year after birth in normal infants. The method used in this study can be used clinically as an objective test of language development for infants with increased risk in language development.
KW - Auditory area
KW - Cerebral dominance
KW - Developmental test
KW - Language processing
KW - NIRS (near infrared spectroscopy)
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UR - http://www.scopus.com/inward/citedby.url?scp=6944227307&partnerID=8YFLogxK
M3 - Article
VL - 44
SP - 165
EP - 171
JO - Japan Journal of Logopedics and Phoniatrics
JF - Japan Journal of Logopedics and Phoniatrics
SN - 0030-2813
IS - 3
ER -