This research delves into the correlation between neural activity and language acquisition in newborns, providing insights into the complex mechanisms at play during prenatal language learning. While prior studies have examined the fetus’s capability to perceive speech rhythms and newborns’ ability to distinguish their mothers’ voices, there is still a requirement for more in-depth exploration into the neural processes governing language learning in the brain.
Mariani and colleagues raise a fundamental question regarding the impact of speech exposure as a stimulus on the neural mechanisms of newborns, potentially bolstering language acquisition. Specifically, they probe into whether this influence is language-specific during the prenatal phase. The researchers employ electroencephalography (EEG) to gauge neural activity in infants exposed to diverse languages, hinting at potential alterations, particularly in low-frequency dynamics, subsequent to exposure to the language experienced before birth. The study incorporates newborns exposed to French, with their neural activities assessed through EEG. The speech stimuli encompass equivalent sentences translated into three languages: French, Spanish, and English.
The primary objective of the research is to investigate whether exposure to speech elicits enduring alterations in neural dynamics that facilitate learning and memory. Additionally, the study aims to discern whether these neuroplastic changes manifest exclusively following exposure to the language heard before birth or if they also occur after exposure to multiple languages. In order to quantify shifts in neural mechanisms, newborns are subjected to three-minute segments devoid of speech at the commencement and conclusion of a twenty-one-minute speech session. The evaluation of effects in these segments specifically references the delta, theta, and gamma bands.
Utilizing detrended fluctuation analysis (DFA) to evaluate the default increase in the α value as evidence of language learning in the newborn brain, the study reveals changes in neural dynamics induced by speech blocks. The researchers anticipate changes, especially in the delta and theta bands, focusing on low-frequency neural dynamics, as speech signals are predominantly composed of low-frequency information, particularly prosody.
In conclusion, this study, which involved exposing newborns to speech blocks, illuminates the intricate link between neural activity and language acquisition. The findings reveal an upsurge in neural activities in response to speech exposure in newborns, indicating that this elevation is not specific to any particular language. The results emphasize how exposure to speech can swiftly foster enduring correlations in neural activity, showcasing the early development of brain specialization for the native language. The implications of the study underscore the profound impact of language experience on shaping the brain and contributing to the process of learning.
Translator: Fulya Gülkaya
Editor: Elif Duymaz
Reference: Mariani, B., Nicoletti, G., Barzon, G., Ortiz Barajas, M. C., Shukla, M., Guevara, R., Suweis, S. S., & Gervain, J. (2023). Prenatal experience with language shapes the brain. Science advances, 9(47), eadj3524. https://doi.org/10.1126/sciadv.adj3524
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