Lower Cortical Activation and Altered Functional Connectivity Characterize Passive Auditory Spatial Attention in ASD

Area of Science:

• Neuroscience
• Developmental Psychology
• Auditory Neuroscience

Background:

• Autism Spectrum Disorder (ASD) involves social and communication challenges.
• Auditory spatial attention, crucial for social interaction, is understudied in ASD.
• Prior research suggests atypical auditory processing in ASD.

Purpose of the Study:

• Investigate neural differences in passive auditory spatial attention in children with ASD.
• Compare brain activity and functional connectivity between ASD and Typically Developing (TD) children.
• Examine the relationship between neural findings and behavioral outcomes.

Main Methods:

• Used source-localized magnetoencephalography (MEG) on children with ASD and TD controls.
• Presented passive, non-social auditory stimuli with "stay" and "jump" location changes.
• Applied linear mixed effects modeling and functional connectivity analyses.

Main Results:

• ASD group exhibited lower cortical activation in the auditory cortex for "jump" trials.
• ASD group showed higher alpha-band functional connectivity between auditory and prefrontal/parietal regions.
• Connectivity patterns correlated with auditory processing scores and ASD symptom severity.

Conclusions:

• Neural mechanisms of auditory spatial attention differ in children with ASD.
• Findings support altered sound orientation processing, even passively, in ASD.
• These differences may contribute to social communication challenges in ASD.