Neural features of sustained emotional information processing in autism spectrum disorder.
Carla A Mazefsky, Amanda Collier, Josh Golt and 1 others
PMID 32106690WHAT IT FOUND
Adolescents with autism showed sustained brain activity in regions handling emotional salience and control for up to 30 seconds after seeing negative words.
This neural persistence predicted emotion dysregulation, suggesting that negative reactions may continue internally long after the stimulus is gone.
Key findings
01Brain regions in the salience network and dorsolateral prefrontal cortex showed heightened and sustained activity in adolescents with ASD compared to controls following negative words.
02Activity in these identified brain regions accounted for 59.2% of the variance in emotion dysregulation scores in the ASD group.
03The amygdala did not show sustained activity, contradicting hypotheses that limbic reactivity drives this process in autism.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The sample size was small for neuroimaging standards. The study was cross-sectional, so it cannot prove that sustained processing causes dysregulation, only that they are linked. The design did not test positive stimuli, so it is unclear if this persistence is specific to negative information. It is unknown whether the participants were consciously aware of this sustained neural activity.
Declared interests
The study was supported by the National Institutes of Health. No other conflicts of interest were reported in the provided text.
The easy way to misread this
Do not assume that outward calm means the patient has processed the event. The brain activity in these adolescents continued for up to 30 seconds after the negative word was removed, suggesting a hidden period of sustained emotional processing that may precede behavioral outbursts.