Attention networks emerge as a key factor in autistic boys’ communication difficulties

Brain scans of 80 boys suggest that difficulties with speech, eye contact and gestures may be linked to how attention systems maintain focus and shift between important cues, not only to language circuitry.

Brain scans of 80 boys suggest that communication problems in autism may be tied as much to the brain’s attention systems as to its language circuitry, according to research from HSE University in Moscow.

The study, published in European Child & Adolescent Psychiatry, examined whether the way major brain networks connect at rest helps explain why some autistic children struggle to speak, follow conversation or use non-verbal signals such as gestures and eye contact. The researchers focused on boys aged five to 12, using imaging data from the ABIDE II project, a large international database of brain scans from autistic and non-autistic children.

Their analysis found that boys with autism showed a different connectivity pattern in the language network than typically developing boys. The language network was less strongly connected with the salience network, which helps the brain detect what is important and shift into a response mode, while its links with the default mode network were stronger. The authors said this suggests language difficulties in autism may reflect more than language itself, and may also involve the systems that help the brain stay oriented to the outside world.

The clearest link came when the team compared brain connectivity with the severity of communication difficulties. For non-verbal communication, which includes eye gaze, facial expression and gestures, the key factor was how well the dorsal attention network held together internally. Boys with weaker connectivity within that network tended to have greater non-verbal difficulties. For verbal communication, the picture was broader: weaker internal connectivity in the dorsal attention network also mattered, but so did weaker links between the dorsal attention network and the salience network, pointing to problems with both sustaining attention and switching it when needed.

According to Alina Minnigulova, a research fellow at the HSE Centre for Language and Brain, the findings show that communication difficulties are linked not only to the language system but also to attention mechanisms. She said verbal and non-verbal problems may rely on somewhat different processes, with maintaining attention appearing especially important for one and both maintaining and shifting attention involved in the other.

That distinction fits with what communication demands in daily life. Following a conversation requires a child not only to stay focused on a speaker, but also to move attention between voices, words, meanings and replies. Previous studies have also linked autism to atypical activity in brain regions involved in social communication, including joint attention and pragmatic language, while other work has pointed to altered connectivity across attention networks and the default mode network.

The new findings may eventually help refine support for autistic children. If attention systems play a role in communication, then interventions that help a child hold attention or shift it more effectively could complement language therapy. The research also hints that different children may need different kinds of help, depending on whether verbal or non-verbal communication is the greater challenge.

The study has important limits. It included only boys, so it is not clear whether the same pattern applies to autistic girls. The sample was relatively small, and the work was correlational, meaning it can show association but not cause and effect. The scans were taken while the children were at rest, not while they were speaking or interacting, and communication was measured through parent interviews rather than direct observation.

Even with those caveats, the study adds to a growing picture of autism as a condition shaped by the coordination of large-scale brain networks rather than by a single isolated language system. In that sense, the findings suggest that what supports communication is not just the machinery of speech, but the brain’s ability to keep attention steady and move it when the moment changes.