Effect of presentation rate on auditory processing in Rett syndrome: event-related potential study.
Daria Kostanian, Anna Rebreikina, Victoria Voinova and 1 others
PMID 37885019WHAT IT FOUND
Brain responses to sound in girls with Rett syndrome show preserved basic learning mechanisms but delayed and weakened later processing stages.
Slower presentation rates help distinguish components, yet abnormalities persist even at the slowest rate tested.
Key findings
01Early auditory processing stages are relatively preserved in the subgroup with measurable responses, while later stages (P2 and N2) are significantly delayed and attenuated.
02Modulation of brain responses by presentation rate is preserved, meaning the basic ability to adapt to stimulus timing remains intact.
03Unlike typically developing children, most auditory brain response characteristics in Rett syndrome do not show typical developmental changes with age.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The analysis was restricted to 12 out of 24 girls with Rett syndrome because the other half did not have measurable brain responses, limiting generalizability. The study did not include a clinical control group, so it is unclear if these brain response patterns are specific to Rett syndrome or shared with other conditions. The sample size was small, and the results may be influenced by the specific high-pass filtering used to process the EEG data. The severity of Rett syndrome symptoms did not correlate with the brain response measures, suggesting these physiological markers may not track with behavioral severity in this sample.
Declared interests
The study was supported by non-U.S. government funding. No specific commercial conflicts of interest were declared in the provided text.
The easy way to misread this
Do not assume that slowing down speech or sound presentation will normalize auditory processing in Rett syndrome. The study found that while brain responses change with presentation rate, the deficits in later processing stages and the delays in timing persisted even at the slowest rate tested (3600 ms).