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Published on: April 9, 2014
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Neural processing of rhythmic speech by children with developmental language disorder (DLD): An EEG study
Mahmoud Keshavarzi1, Susan Richards1, Georgia Feltham1
1Centre for Neuroscience in Education, Department of Psychology, University of Cambridge, Cambridge, United Kingdom.
Imaging Neuroscience (Cambridge, Mass.)
|August 13, 2025
Summary
Children with developmental language disorder (DLD) show altered neural processing of rhythmic speech, particularly in gamma-band activity and its coupling with lower frequencies. These findings highlight differences in auditory processing critical for language development.
Area of Science:
- Neuroscience
- Developmental Psychology
- Speech and Language Sciences
Background:
- Speech rhythm and prosody are crucial for language acquisition.
- Atypical rhythmic processing in early childhood is a risk factor for developmental language disorders (DLD).
- Neural underpinnings of rhythmic speech processing in DLD remain under-explored.
Purpose of the Study:
- To investigate the neural processing of rhythmic speech in 9-year-old children with and without DLD using electroencephalography (EEG).
- To examine phase entrainment, power, angular velocity, and cross-frequency coupling (PAC, PPC) in delta, theta, and low gamma bands.
- To test predictions of altered rhythmic processing in DLD based on auditory theories like Temporal Sampling theory.
Main Methods:
- EEG recordings were obtained from 9-year-old children with and without DLD while they listened to rhythmic speech.
- Analysis included phase entrainment, angular velocity, power, event-related potentials (ERPs), phase-amplitude coupling (PAC), and phase-phase coupling (PPC).
- Specific frequency bands (delta, theta, low gamma) were analyzed based on prior literature.
Main Results:
- Children with DLD showed significant phase entrainment in delta and theta bands, comparable to controls.
- Only control children exhibited significant phase entrainment in the low gamma band.
- Children with DLD had significantly higher theta and low gamma power, and altered gamma-band angular velocity and low-frequency phase effects on gamma oscillations compared to controls.
Conclusions:
- EEG data reveal significant differences in neural mechanisms of rhythmic speech processing between children with and without DLD.
- Altered gamma-band activity and cross-frequency coupling in DLD suggest atypical auditory processing.
- Findings support auditory theories of DLD, particularly Temporal Sampling theory, highlighting the role of neural oscillations in speech perception.
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