Morphometric evaluations based on Voxel Based Morphometry on adolescents with autism spectrum disorders

Area of Science:

• Neuroscience
• Developmental Psychology
• Medical Imaging

Background:

• Autism Spectrum Disorder (ASD) is a neurodevelopmental condition characterized by social, communication, and behavioral challenges.
• Previous research suggests structural brain abnormalities in individuals with ASD, but findings vary.
• Asperger's Syndrome, now included within ASD, presents with distinct characteristics.

Purpose of the Study:

• To investigate volumetric changes in grey matter among adolescents diagnosed with Asperger's Syndrome using Voxel-Based Morphometry (VBM).
• To compare grey matter volumes between adolescents with ASD and neurotypical controls.

Main Methods:

• Voxel-Based Morphometry (VBM) was employed to analyze brain scans.
• The study included 37 male adolescents (ages 12-19) with ASD (Asperger's Syndrome) and 15 age-matched neurotypical controls.
• Statistical significance was determined using p<0.007 (uncorrected) and p<0.05 (FWE corrected).

Main Results:

• A significant decrease in grey matter volume was observed in the ASD group across numerous brain regions.
• Affected areas included the frontal, parietal, occipital, and temporal lobes, as well as the cerebellum and cingulate cortex.
• Most observed volumetric changes were bilateral.

Conclusions:

• Reduced grey matter volume in specific brain regions is associated with ASD in adolescents.
• These structural alterations may underlie the cognitive and behavioral deficits characteristic of ASD.
• The findings underscore the role of abnormal central nervous system organization in ASD pathogenesis.