Altered global modular organization of intrinsic functional connectivity in autism arises from atypical node-level processing.
In young kids with autism, single brain nodes misfire before the whole network breaks, tying directly to social and sensory struggles.
01Research in Context
What this study did
Sigar et al. (2023) scanned kids with and without autism while they rested. The kids were 5 to 10 years old.
The team looked at how brain areas group into modules. They asked if the modules differ at the node level, not just the wires between nodes.
What they found
Kids with autism showed odd modular layout. The change came from how single nodes act, not from weaker long wires.
These node changes tracked with social and sensory scores. Worse scores went with stranger node roles.
How this fits with other research
Sun et al. (2025) extends this view. They found the parahippocampal node drives later gray-matter spread in toddlers. Together, the studies say early node problems seed wider network change.
Dudley et al. (2019) seems to clash. They saw no link between executive network wires and social skill in adult men with autism. The gap fades when you note age: node-link ties may shrink as clients grow.
Pastor-Cerezuela et al. (2020) and Van Hanegem et al. (2014) add the sensory lens. Both show sensory style predicts day-to-day skills. Priyanka’s neural node data give a brain reason for that link.
Why it matters
When you see social or sensory red flags, think node-level brain change, not just weak long-range links. This view can guide biomarker work and remind you that sensory supports may calm the node, not just the synapse.
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02At a glance
03Original abstract
Autism spectrum disorder (ASD) is a neurodevelopmental condition characterized by restricted interests and repetitive behaviors as well as social-communication deficits. These traits are associated with atypicality of functional brain networks. Modular organization in the brain plays a crucial role in network stability and adaptability for neurodevelopment. Previous neuroimaging research demonstrates discrepancies in studies of functional brain modular organization in ASD. These discrepancies result from the examination of mixed age groups. Furthermore, recent findings suggest that while much attention has been given to deriving atlases and measuring the connections between nodes, within node information may also be crucial in determining altered modular organization in ASD compared with typical development (TD). However, altered modular organization originating from systematic nodal changes are yet to be explored in younger children with ASD. Here, we used graph-theoretical measures to fill this knowledge gap. To this end, we utilized multicenter resting-state fMRI data collected from 5 to 10-year-old children-34 ASD and 40 TD obtained from the Autism Brain Image Data Exchange (ABIDE) I and II. We demonstrate that alterations in topological roles and modular cohesiveness are the two key properties of brain regions anchored in default mode, sensorimotor, and salience networks, and primarily relate to social and sensory deficits in children with ASD. These results demonstrate that atypical global network organization in children with ASD arises from nodal role changes, and contribute to the growing body of literature suggesting that there is interesting information within nodes providing critical markers of functional brain networks in autistic children.
Autism research : official journal of the International Society for Autism Research, 2023 · doi:10.1002/aur.2840