A convergent structure-function substrate of cognitive imbalances in autism

Area of Science:

• Neuroscience
• Developmental Psychology
• Genetics

Background:

• Autism spectrum disorder (ASD) presents significant heterogeneity in neurodevelopmental profiles.
• Cognitive skills, particularly verbal and nonverbal intelligence, vary widely among individuals with ASD.
• A common pattern involves deficits in verbal abilities alongside average or superior nonverbal skills.

Purpose of the Study:

• To investigate the brain mechanisms underlying cognitive imbalances in autism spectrum disorder.
• To explore the relationship between intelligence profiles and neuroimaging findings in ASD.

Main Methods:

• Utilized categorical and dimensional IQ profiling across two large datasets.
• Employed multimodal neuroimaging techniques to analyze brain structure and function.
• Examined datasets comprising individuals with ASD and neurotypical controls.

Main Results:

• Confirmed a significant verbal to nonverbal IQ imbalance in individuals with ASD across both datasets.
• Identified a structure-function substrate for this cognitive imbalance in Dataset-1.
• Observed atypical cortical thickening and altered functional integration in language, sensory, and higher cognitive brain networks.

Conclusions:

• Intelligence disparities are pronounced in ASD and associated with distinct brain structure-function alterations.
• Findings suggest that cognitive imbalances are a consistent feature of ASD, impacting multiple neural networks.
• Incorporating cognitive imbalance analysis may refine autism research, aid in parsing heterogeneity, and inform targeted interventions.