Frontal EEG alpha asymmetry in youth with autism: Sex differences and social-emotional correlates.
Emily Neuhaus, Megha Santhosh, Anna Kresse and 10 others
PMID 37776030WHAT IT FOUND
Youth with autism showed no difference in frontal brain asymmetry compared to peers.
However, specific brain activity patterns correlated with social difficulties in females and externalizing behaviors in males, suggesting sex-specific biological markers for behavioral challenges.
Key findings
01There was no significant difference in frontal alpha asymmetry between youth with ASD and those without.
02In autistic females, higher frontal alpha power (indicating lower neural activity) was associated with more social communication difficulties.
03In autistic males, specific asymmetry patterns were linked to externalizing symptoms and social communication, though these findings contradicted traditional approach-withdrawal models.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The sample excluded individuals with intellectual disabilities or those who were non-verbal, so findings may not apply to the full spectrum of autism. Youth with autism had fewer valid EEG trials retained for analysis compared to controls, which could affect the robustness of the data. The study used a conventional statistical threshold without correcting for multiple comparisons, increasing the risk of false-positive findings. Internalizing symptoms were measured by parent report, which may overlap with core autism features like social withdrawal, making it difficult to distinguish anxiety from autism traits.
Declared interests
One author reports consulting fees, research funding, advisory board roles, and royalties from various companies and publishers. The remaining authors report no conflicts of interest.
The easy way to misread this
Do not interpret the lack of group difference in frontal asymmetry as evidence that brain activity is identical in autism. The study found significant sex-specific correlations between brain power and behavior within the autism group, meaning that individual neural patterns still relate to clinical symptoms even when group averages do not differ.