Resting-State Electroencephalogram and Speech Perception in Young Children with Developmental Language Disorder.

Area of Science:

• Neuroscience
• Developmental Psychology
• Speech and Language Sciences

Background:

• Endogenous brain oscillations are crucial for cognitive processes, including language and speech perception in adults.
• The developmental trajectory of these spontaneous brain activities in children, particularly those with typical language development (TLD) versus developmental language disorder (DLD), is not well understood.

Purpose of the Study:

• To investigate differences in resting-state electroencephalography (EEG) oscillations between preschoolers with DLD, age-matched TLD controls, and adults.
• To explore potential neural markers for typical and atypical language development in early childhood.

Main Methods:

• Resting-state EEG recordings were obtained from three groups: preschoolers with DLD, preschoolers with TLD, and adults.
• Analysis focused on oscillatory power across different frequency bands and hemispheric lateralization.
• Behavioral tests assessing speech perception were also administered.

Main Results:

• Adults exhibited significantly lower oscillatory power than children across all frequency bands, indicating age-related changes.
• No significant differences in oscillatory power or hemispheric lateralization were found between the DLD and TLD preschooler groups.
• A smaller theta/alpha band ratio was observed in TLD children compared to DLD children, an incidental finding.
• Behavioral results showed mixed performance on speech perception tasks and did not correlate with EEG measures.

Conclusions:

• Resting-state EEG power differences primarily reflect age, not language development status in preschoolers.
• The theta/alpha band ratio warrants further investigation as a potential neural marker for DLD in young children.
• Current resting-state EEG measures may have limited utility for distinguishing between TLD and DLD preschoolers at a group level.