Infant word segmentation recruits the cerebral network of phonological short-term memory

Yasuyo Minagawa, Yoko Hakuno, Ai Kobayashi, Nozomi Naoi, Shozo Kojima

研究成果: Article査読

7 被引用数 (Scopus)


Segmenting word units from running speech is a fundamental skill infants must develop in order to acquire language. Despite ample behavioral evidence of this skill, its neurocognitive basis remains unclear. Using behavioral testing and functional near-infrared spectroscopy, we aimed to uncover the neurocognitive substrates of word segmentation and its development. Of three age-groups of Japanese infants (5–6, 7–8, and 9–10 months of age), the two older age-groups showed significantly larger temporo-parietal (particularly supramarginal gyrus) responses to target words repeatedly presented for training, than to control words. After the training, they also exhibited stronger inferior frontal responses to target words embedded in sentences. These findings suggest that word segmentation largely involves a cerebral circuit of phonological (phonetic) short-term memory. The dorsal pathway involved in encoding and decoding phonological representation may start to function stably at around 7 months of age to facilitate the growth of the infant's vocabulary.

ジャーナルBrain and Language
出版ステータスPublished - 2017 7月 1

ASJC Scopus subject areas

  • 言語および言語学
  • 実験心理学および認知心理学
  • 言語学および言語
  • 認知神経科学
  • 言語聴覚療法


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