Functional MRI of language lateralization during development in children.

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• Language function distribution in the brain changes dynamically from infancy to adulthood.
• Macroscopic measures of language lateralization indicate a continuous developmental process.

Purpose of the Study:

• To review functional MRI studies on language skills in children aged 5 to 18 years.
• To analyze developmental changes in brain lateralization for language in typically-developing children and those with brain injuries.
• To establish normative data for brain activation patterns during language tasks in children.

Main Methods:

• Summarized a series of functional MRI (fMRI) studies.
• Utilized fMRI-compatible language tasks targeting early and later developing lexical and sentential skills.
• Included studies on typically-developing children and children with various brain injuries or neurological disorders.

Main Results:

• In typically-developing children, age-related changes in lateralization correlate with the protracted development of specific language skills.
• Developmental changes reflect skill acquisition processes rather than general brain maturation.
• Normative data across development are crucial for distinguishing typical patterns from abnormalities.

Conclusions:

• Age and developmental stage are critical factors in neuroimaging studies of child language.
• Understanding developmental trajectories of language lateralization is essential for interpreting brain imaging data in children.
• Normative data aids in identifying atypical language development patterns in pediatric populations.