Sensory Processing and Autistic Traits: Mediation Effect of Frontal Alpha Asymmetry.

This research looked at how the brain might connect sensory sensitivities with autism-like traits in typical adults. They found that people who avoid sensory experiences tend to have different brain activity patterns and show more autism-like characteristics. The brain activity seems to be part of the connection between avoiding sensory input and having autism traits, suggesting emotions and brain patterns are important in understanding sensory issues.

This study examined how brain activity patterns might explain the relationship between sensory processing difficulties and autistic traits in 73 neurotypical young adults. Researchers measured brain activity using EEG and assessed sensory processing patterns and autistic traits through questionnaires. They found that individuals with higher sensation avoiding patterns showed greater right-sided brain activity and more autistic traits. Importantly, the right-sided brain activity partially mediated the relationship between sensation avoiding and autistic traits, suggesting that withdrawal-related emotions and cortical activity patterns play a role in linking sensory processing differences to autistic characteristics.

Findings suggest that addressing sensation avoiding patterns and associated withdrawal emotions may be important in autism interventions. The identified brain activity patterns could potentially serve as biomarkers or treatment targets. However, research in autistic populations is needed before clinical applications can be recommended.

Study was conducted only in neurotypical adults, limiting generalizability to autistic individuals. Cross-sectional design prevents causal inferences. Sample size of 73 is relatively small for mediation analysis. Reliance on self-report measures for sensory processing and autistic traits may introduce bias.

A sensory processing approach can be used to intervene with behaviours in individuals with autistic symptoms. However, neural mechanisms linking sensory processing patterns and autistic features are less understood. The purpose of this study was to investigate whether frontal alpha asymmetry could mediate the relationship between atypical sensory processing and autistic traits. Seventy-three neurotypical young adults were included in this study.

Resting-state brain activity was recorded using electroencephalography. After the recording, participants completed the Adolescent/Adult Sensory Profile and the Autism-Spectrum Quotient. Frontal alpha asymmetry was calculated by subtracting left frontal alpha power from right frontal alpha power. Correlation analysis was performed to find which sensory processing patterns were related to frontal alpha asymmetry and autistic traits.

Mediation analysis was then conducted with sensory avoiding patterns as an independent variable, autistic traits as a dependent variable, and frontal alpha asymmetry as a mediator. Interrelations between higher sensation avoiding patterns, greater right-sided cortical activity, and increased autistic traits were found. The sensation avoiding patterns affected autistic traits directly and indirectly through right-sided cortical activity. Findings of the current study demonstrate a mediating role of frontal alpha asymmetry in the relationship between sensation avoiding patterns and autistic traits in neurotypical adults.

This study suggests that sensation avoiding patterns and withdrawal-related emotions, which are associated with right-sided cortical activity, need to be considered to improve autism symptoms.