Cognitive stimulation has potential for brain activation in individuals with Rett syndrome.
A 10-minute eye game can immediately boost brain symmetry in Rett syndrome, especially in younger girls.
01Research in Context
What this study did
A team gave girls with Rett syndrome a 10-minute eye-tracking game. The girls used their eyes to pick items on a screen.
While the girls played, the team recorded brain waves with EEG. They looked at delta, beta, and symmetry before and after the game.
What they found
After the short game, delta power dropped and beta power rose. Brain symmetry and entropy also went up.
Younger girls, under age 10, showed the biggest symmetry boost. One quick session already shifted brain activity toward a more alert pattern.
How this fits with other research
Bertapelli et al. (2016) ran a 5-day cognitive training and saw the same beta/theta fix. Their longer program matches the new single-shot EEG change, showing the effect can scale down to minutes.
Norman et al. (2021) stretched eye-tracker work to two full years. They tracked attention and choice gains, while Mammarella et al. (2022) shows the first-minute brain reason those gains can happen.
Worsham et al. (2015) found less inter-hemispheric coherence in autistic boys. Mammarella et al. (2022) shows the reverse in Rett: symmetry jumps after play. Different diagnoses, different directions, but both use EEG coherence to map connection strength.
Why it matters
You now have a 10-minute probe that tells you if a girl’s brain is ready to learn. Use it before sessions to check arousal. If symmetry is low, run eye-tracking games first, then teach skills. No extra gear beyond your usual screen and EEG.
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02At a glance
03Original abstract
BACKGROUND: Knowledge regarding neuropsychological training in Rett syndrome (RS) is scarce. The aim of this study was to assess the outcome and the duration of the effect of cognitive stimulation on topographic electroencephalography (EEG) data in RS. METHODS: Twenty female children diagnosed with RS were included in the analysis. Girls with RS conducted a cognitive task using an eye-tracker designed to evaluate access and choice skills. EEG data were acquired during the experimental procedure including two 10-min baseline stages before and after the task. Topographical changes of several EEG spectral markers including absolute and relative powers, Brain Symmetry Index and entropy were assessed. RESULTS: Topographic significance probability maps suggested statistical decreases on delta activity and increases on beta rhythm associated with the cognitive task. Entropy increased during and after the task, likely related to more complex brain activity. A significant positive interaction was obtained between Brain Symmetry Index and age showing that the improvement of interhemispheric symmetry was higher in younger girls (5-10 years). CONCLUSIONS: According to our findings, significant alterations of brain rhythms were observed during and after cognitive stimulation, suggesting that cognitive stimulation may have effects on brain activity beyond the stimulation period. Finally, our promising results also showed an increase brain symmetry that was especially relevant for the younger group. This could suggest an interaction of the eye-tracking cognitive task; however, further studies in this field are needed to assess the relation between brain asymmetries and age.
Journal of intellectual disability research : JIDR, 2022 · doi:10.1111/jir.12902