Preterm and full term infant vocalization and the origin of language.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
14 10 2019
14 10 2019
Historique:
received:
10
07
2019
accepted:
27
09
2019
entrez:
16
10
2019
pubmed:
16
10
2019
medline:
31
10
2020
Statut:
epublish
Résumé
How did vocal language originate? Before trying to determine how referential vocabulary or syntax may have arisen, it is critical to explain how ancient hominins began to produce vocalization flexibly, without binding to emotions or functions. A crucial factor in the vocal communicative split of hominins from the ape background may thus have been copious, functionally flexible vocalization, starting in infancy and continuing throughout life, long before there were more advanced linguistic features such as referential vocabulary. 2-3 month-old modern human infants produce "protophones", including at least three types of functionally flexible non-cry precursors to speech rarely reported in other ape infants. But how early in life do protophones actually appear? We report that the most common protophone types emerge abundantly as early as vocalization can be observed in infancy, in preterm infants still in neonatal intensive care. Contrary to the expectation that cries are the predominant vocalizations of infancy, our all-day recordings showed that protophones occurred far more frequently than cries in both preterm and full-term infants. Protophones were not limited to interactive circumstances, but also occurred at high rates when infants were alone, indicating an endogenous inclination to vocalize exploratorily, perhaps the most fundamental capacity underlying vocal language.
Identifiants
pubmed: 31611607
doi: 10.1038/s41598-019-51352-0
pii: 10.1038/s41598-019-51352-0
pmc: PMC6791864
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
14734Subventions
Organisme : NIDCD NIH HHS
ID : R01 DC011027
Pays : United States
Organisme : NIDCD NIH HHS
ID : R01 DC015108
Pays : United States
Organisme : NIDCD NIH HHS
ID : R01 DC006099
Pays : United States
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