Assessing Functional Brain Network Dynamics in Dyslexia from fNIRS Data

Developmental dyslexia is characterized by a deficit of phonological awareness whose origin is related to atypical neural processing of speech streams. This can lead to differences in the neural networks that encode audio information for dyslexics. In this work, we investigate whether such differenc...

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Bibliographic Details
Published in:International journal of neural systems 2023-04, Vol.33 (4)
Main Authors: Gallego-Molina, Nicolás J., Ortiz, Andrés, Martínez-Murcia, Francisco J., Rodríguez-Rodríguez, Ignacio, Luque, Juan L.
Format: Article
Language:English
Subjects:
Audio data
Brain
Dyslexia
Functional integration
Infrared analysis
Infrared spectra
Medical imaging
Near infrared radiation
Network analysis
Neural networks
Speech
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Summary:Developmental dyslexia is characterized by a deficit of phonological awareness whose origin is related to atypical neural processing of speech streams. This can lead to differences in the neural networks that encode audio information for dyslexics. In this work, we investigate whether such differences exist using functional near-infrared spectroscopy (fNIRS) and complex network analysis. We have explored functional brain networks derived from low-level auditory processing of nonspeech stimuli related to speech units such as stress, syllables or phonemes of skilled and dyslexic seven-year-old readers. A complex network analysis was performed to examine the properties of functional brain networks and their temporal evolution. We characterized aspects of brain connectivity such as functional segregation, functional integration or small-worldness. These properties are used as features to extract differential patterns in controls and dyslexic subjects. The results corroborate the presence of discrepancies in the topological organizations of functional brain networks and their dynamics that differentiate between control and dyslexic subjects, reaching an Area Under ROC Curve (AUC) up to 0.89 in classification experiments.
ISSN:0129-0657
1793-6462
DOI:10.1142/S012906572350017X