Rapid learning of a phonemic discrimination in the first hours of life.
Journal
Nature human behaviour
ISSN: 2397-3374
Titre abrégé: Nat Hum Behav
Pays: England
ID NLM: 101697750
Informations de publication
Date de publication:
08 2022
08 2022
Historique:
received:
24
07
2021
accepted:
20
04
2022
pubmed:
3
6
2022
medline:
24
8
2022
entrez:
2
6
2022
Statut:
ppublish
Résumé
Human neonates can discriminate phonemes, but the neural mechanism underlying this ability is poorly understood. Here we show that the neonatal brain can learn to discriminate natural vowels from backward vowels, a contrast unlikely to have been learnt in the womb. Using functional near-infrared spectroscopy, we examined the neuroplastic changes caused by 5 h of postnatal exposure to random sequences of natural and reversed (backward) vowels (T1), and again 2 h later (T2). Neonates in the experimental group were trained with the same stimuli as those used at T1 and T2. Compared with controls, infants in the experimental group showed shorter haemodynamic response latencies for forward vs backward vowels at T1, maximally over the inferior frontal region. At T2, neural activity differentially increased, maximally over superior temporal regions and the left inferior parietal region. Neonates thus exhibit ultra-fast tuning to natural phonemes in the first hours after birth.
Identifiants
pubmed: 35654965
doi: 10.1038/s41562-022-01355-1
pii: 10.1038/s41562-022-01355-1
pmc: PMC9391223
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1169-1179Informations de copyright
© 2022. The Author(s).
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