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Published on: July 1, 2015
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Lateralized frontal activity for Japanese phonological processing during child development.
Takaaki Goto1, Yosuke Kita2, Kota Suzuki2
1Department of Developmental Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo Japan ; Department of Education, Tokoha University, Shizuoka Japan.
Frontiers in Human Neuroscience
|August 4, 2015
Summary
Phonological awareness development in Japanese children shows a shift in brain activity. Older children exhibit mature left-dominant brain function for phonological processing, unlike younger children.
Area of Science:
- Neuroscience
- Developmental Psychology
- Cognitive Science
Background:
- Phonological awareness is crucial for reading acquisition across languages.
- Developmental shifts in brain activity support phonological processing.
- Neurobiological changes in Japanese speakers remain under-explored.
Purpose of the Study:
- Investigate developmental shifts in phonological processing brain functions in Japanese children.
- Examine the relationship between age, brain activity, and phonological task performance.
Main Methods:
- Conducted a phonological awareness task with 103 Japanese children aged 7-12.
- Measured hemodynamic brain activity using functional near-infrared spectroscopy (fNIRS).
- Analyzed behavioral performance and brain activity patterns in relation to age.
Main Results:
- Younger children showed more errors and slower processing, with bilateral dorsolateral prefrontal cortex (DLPFC) activation.
- Older children performed faster and more accurately, with dominant left DLPFC activity, indicating skill acquisition.
- Age and leftward lateralization significantly impacted behavioral performance, with stronger influence in older children.
Conclusions:
- Japanese children exhibit a neurobiological developmental shift in phonological processing.
- Left DLPFC lateralization is associated with mature phonological skills.
- Common brain regions are critical for phonological development across diverse language systems.
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