Dynamic lag analysis reveals atypical brain information flow in autism spectrum disorder.
Ville Raatikainen, Vesa Korhonen, Viola Borchardt and 10 others
PMID 31637863WHAT IT FOUND
Resting-state brain scans of 40 young adults showed atypical timing of signal flow in autism.
Networks that usually lead or follow each other in neurotypical brains appeared more synchronized in autism, particularly involving attention and visual networks.
Key findings
01Dynamic lag analysis revealed significant differences in the timing of brain signal propagation between adults with ASD and neurotypical controls.
02In neurotypical individuals, brain networks showed a structured pattern where some consistently led (source) and others followed (destination), whereas in ASD this distinction was diminished.
03The altered lag patterns in ASD were concentrated in connections between the salience, executive, visual, and default-mode networks.
STILL TO COME
How it was doneWhat they found
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The sample size was small (40 participants), which limits the power to detect differences. The study used cross-sectional data, so it cannot determine if these brain patterns cause ASD symptoms or are a result of the condition. Three ASD participants and one control participant were taking psychotropic medications, which could influence brain activity, though the authors state this effect was not analyzed. The analysis excluded three neurotypical participants due to missing data, replacing them with three others who did not have full cognitive testing results.
Declared interests
Funded by Instrumentariumin Tiedesäätiö, Jane ja Aatos Erkon Säätiö, National Institute of Mental Health, Suomen Akatemia, Tauno Tönningin Säätiö, Tekniikan Edistämissäätiö, and Walter Ahlström foundation. No commercial conflicts declared.
The easy way to misread this
Do not interpret these brain scan results as a diagnostic test or a direct explanation for behavioral symptoms. The study describes a statistical difference in brain signal timing in a small group, not a mechanism that can be observed or measured in clinical practice.