The Neonate Brain's Sensitivity to Repetition-Based Structure: Specific to Speech?

Autor/inn/en	Nallet, Caroline; Berent, Iris; Werker, Janet F.; Gervain, Judit
Titel	The Neonate Brain's Sensitivity to Repetition-Based Structure: Specific to Speech?
Quelle	In: Developmental Science, 26 (2023) 6, (9 Seiten) PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Nallet, Caroline)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1363-755X
DOI	10.1111/desc.13408
Schlagwörter	Infants; Music; Auditory Stimuli; Brain; Brain Hemisphere Functions; Speech; Repetition + Suchen Sie Ihr Suchwort? Infant; Toddler; Toddlers; Kleinkind; Musik; Auditive Stimulation; Gehirn; Speaking; Sprechen; Wiederholung
Abstract	Newborns are able to extract and learn repetition-based regularities from the speech input, that is, they show greater brain activation in the bilateral temporal and left inferior frontal regions to trisyllabic pseudowords of the form AAB (e.g., "babamu") than to random ABC sequences (e.g., "bamuge"). Whether this ability is specific to speech or also applies to other auditory stimuli remains unexplored. To investigate this, we tested whether newborns are sensitive to regularities in musical tones. Neonates listened to AAB and ABC tones sequences, while their brain activity was recorded using functional Near-Infrared Spectroscopy (fNIRS). The paradigm, the frequency of occurrence and the distribution of the tones were identical to those of the syllables used in previous studies with speech. We observed a greater inverted (negative) hemodynamic response to AAB than to ABC sequences in the bilateral temporal and fronto-parietal areas. This inverted response was caused by a decrease in response amplitude, attributed to habituation, over the course of the experiment in the left fronto-temporal region for the ABC condition and in the right fronto-temporal region for both conditions. These findings show that newborns' ability to discriminate AAB from ABC sequences is not specific to speech. However, the neural response to musical tones and spoken language is markedly different. Tones gave rise to habituation, whereas speech was shown to trigger increasing responses over the time course of the study. Relatedly, the repetition regularity gave rise to an inverted hemodynamic response when carried by tones, while it was canonical for speech. Thus, newborns' ability to detect repetition is not speech-specific, but it engages distinct brain mechanisms for speech and music. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01