Brain Scans Reveal Two Distinct Subtypes of Autism Based on Brain Connectivity Patterns
Two Autism Subtypes Identified Through Brain Connectivity Analysis
A recent study has provided compelling evidence that autism may not be a single condition but rather includes at least two biologically distinct subtypes, each defined by different patterns of brain communication.
The Research Approach
Scientists combined brain imaging data from nearly 1,000 people diagnosed with autism with findings from 20 genetically engineered mouse models. This dual approach allowed researchers to examine both human neurobiology and controlled animal models to identify consistent patterns.
Hyperconnectivity vs. Hypoconnectivity
The analysis revealed two clear subtypes:
- Hyperconnectivity subtype: Brain regions show more communication between them than typically observed, suggesting excessive neural integration
- Hypoconnectivity subtype: Communication between brain regions is reduced, indicating potential disconnection or reduced coordination
Implications for Understanding Autism
These findings suggest that the autism spectrum may actually represent multiple overlapping conditions with different underlying neurobiological mechanisms. Identifying these subtypes could eventually guide more personalized approaches to diagnosis and intervention, as currently autism is diagnosed based on behavioral symptoms without distinguishing between its biological variations.