Autism-related shifts in the brain's information processing hierarchy

Area of Science:

• Neuroscience
• Developmental Psychology
• Computational Psychiatry

Background:

• Autism spectrum disorder (ASD) mechanisms remain incompletely understood.
• Challenges include diverse phenotypes, lack of biomarkers, and integration frameworks.
• Current understanding lacks a unifying system-level explanation for ASD's complexity.

Purpose of the Study:

• To propose a novel framework for understanding autism mechanisms.
• To present sensory-transmodal brain hierarchy alterations as a core system-level mechanism in ASD.
• To integrate diverse behavioral, cognitive, and neural findings within a hierarchical processing model.

Main Methods:

• This is a review article, synthesizing existing research.
• It proposes a theoretical model based on hierarchical brain organization.
• The model integrates findings from behavioral studies, neuroimaging, and computational neuroscience.

Main Results:

• Altered sensory-transmodal brain hierarchy offers a unifying mechanism for ASD.
• This hierarchical framework explains diverse autism symptomatology and neurodevelopmental hallmarks.
• It accounts for shifts in social information processing and enhanced perceptual functions.

Conclusions:

• A hierarchical processing framework provides a consolidated view of autism.
• This model integrates heterogeneous neuroimaging findings and computational theories.
• Understanding brain hierarchy alterations is crucial for advancing autism research and intervention.