Lower Cortical Activation and Altered Functional Connectivity Characterize Passive Auditory Spatial Attention in ASD.
Children with ASD show a sleepy auditory cortex yet chatty fronto-parietal alpha waves when sound moves, so lean on visual cues and longer pauses, not rapid verbal redirects.
01Research in Context
What this study did
Researchers scanned the kids with ASD and 30 typical peers using MEG. All children listened to sounds that moved left or right while they watched a silent movie.
The team measured how much the auditory cortex lit up and how well fronto-parietal areas talked to each other. They focused on alpha brain waves because these track where we pay attention.
What they found
Kids with ASD showed weaker activation in their auditory cortex when the sound location changed. Their brains basically shrugged at the shift.
Surprise: the same kids had stronger alpha-band links between frontal and parietal regions. Weak input, but extra long-range chatter.
How this fits with other research
Bao et al. (2017) saw the same lab find weaker thalamic 'filter' links in ASD during everyday sounds. Both studies point to a sleepy sensory gate.
Cornew et al. (2012) reported higher resting alpha power in parietal areas that tracked autism severity. Sergio's group now shows this extra alpha also shows up when kids try to shift attention.
Finke et al. (2017) found ASD kids need longer silent gaps to notice sound breaks. Sergio's weaker auditory-cortex activation may explain why those gaps are harder to catch.
Why it matters
If the auditory cortex is sluggish, don't count on quick sound cues to redirect attention. Instead, give a visual prompt or a longer pause before repeating instructions. Pair that with clear spatial seating to cut down on competing noise. The extra fronto-parietal alpha may look 'noisy,' but it could also be the child's workaround — so keep demands consistent and predictable rather than adding more auditory steps.
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02At a glance
03Original abstract
Autism Spectrum Disorder (ASD) is a developmental condition characterized by difficulties in social interaction, communication, and sensory processing. The ability to orient towards sounds is a key component of social interactions, yet auditory spatial attention remains relatively understudied in ASD, despite prior research indicating differences in this domain. Here, we investigate the neural signatures associated with passive auditory spatial attention in children with ASD (n = 21, ages 6-17) relative to age- and IQ-matched Typically Developing (TD) children (n = 31), using source-localized magnetoencephalography (MEG). Participants listened passively, while watching a silenced movie, to non-social auditory stimuli designed to either remain lateralized to one hemifield (stay trials) or to change in location from one side to the contralateral hemifield (jump trials). Linear mixed effects modeling showed lower cortical activation in the auditory cortex in the ASD group in response to jump trials, relative to the TD group. Additionally, functional connectivity analyses showed higher alpha-band functional connectivity in the ASD group between left auditory cortex seeds and right prefrontal and left parietal regions known to be recruited during auditory spatial attention. Right prefrontal alpha-band connectivity estimates were associated with behaviorally assessed auditory processing scores, whereas left parietal connectivity estimates were associated with ASD symptomatology. Our results align with the hypothesis that auditory spatial attention generally, and specifically orientation to sounds even when experienced passively, differs in ASD versus TD children.
Autism research : official journal of the International Society for Autism Research, 2025 · doi:10.1016/j.heares.2005.11.010