Increased frontal cortical folding in autism: a preliminary MRI study

Area of Science:

• Neuroscience
• Developmental Neuroscience
• Autism Spectrum Disorder Research

Background:

• Cerebral cortical folding patterns are crucial for brain development and function.
• Abnormalities in brain structure are frequently observed in individuals with autism spectrum disorder (ASD).
• The gyrification index (GI) offers a quantitative measure of cortical folding.

Purpose of the Study:

• To investigate cerebral folding patterns in individuals with autism using the gyrification index (GI).
• To compare GI between autistic individuals and healthy controls across different age groups.
• To explore potential correlations between altered gyrification and age in autism.

Main Methods:

• Utilized magnetic resonance imaging (MRI) scans to obtain frontal coronal slices.
• Calculated the gyrification index (GI) as the ratio of total to outer cortical contour.
• Compared GI values between a group of 30 non-mentally retarded individuals with autism and 32 matched healthy controls.

Main Results:

• Left frontal GI was significantly higher in autistic children and adolescents compared to controls.
• This difference in left frontal GI was not observed in the adult autistic group.
• Cortical folding, measured by GI, showed a bilateral decrease with age in the total autistic sample, but not in controls.

Conclusions:

• Preliminary findings suggest abnormal gyrification patterns in autism.
• Altered cortical folding may be linked to observed cortical anomalies in individuals with autism.
• Further research is warranted to elucidate the role of gyrification in autism pathophysiology.