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Bridging the Divide: Brain and Behavior in Developmental Language Disorder

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BRAIN SCIENCES
卷 13, 期 11, 页码 -

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MDPI
DOI: 10.3390/brainsci13111606

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developmental language disorder; child language disorders; language processing; neuroimaging; MRI; brain-behavior relationship; theoretical accounts

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Developmental language disorder is a heterogeneous neurodevelopmental disorder that affects the language comprehension and production of children. The cause of DLD is believed to involve genetic, biological, and environmental factors, but the relationship between theoretical explanations and neuroimaging findings has been challenging due to individual variability and inconsistent results.
Developmental language disorder (DLD) is a heterogenous neurodevelopmental disorder that affects a child's ability to comprehend and/or produce spoken and/or written language, yet it cannot be attributed to hearing loss or overt neurological damage. It is widely believed that some combination of genetic, biological, and environmental factors influences brain and language development in this population, but it has been difficult to bridge theoretical accounts of DLD with neuroimaging findings, due to heterogeneity in language impairment profiles across individuals and inconsistent neuroimaging findings. Therefore, the purpose of this overview is two-fold: (1) to summarize the neuroimaging literature (while drawing on findings from other language-impaired populations, where appropriate); and (2) to briefly review the theoretical accounts of language impairment patterns in DLD, with the goal of bridging the disparate findings. As will be demonstrated with this overview, the current state of the field suggests that children with DLD have atypical brain volume, laterality, and activation/connectivity patterns in key language regions that likely contribute to language difficulties. However, the precise nature of these differences and the underlying neural mechanisms contributing to them remain an open area of investigation.

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