Cognitive and Electrophysiological Correlates of Working Memory Impairments in Neurofibromatosis Type 1.

Only 16 children with NF1 and 16 controls were studied, so the results may not generalise to all children with NF1 or to younger children and adults. The NF1 group included children with ADHD and autism diagnoses, and some were taking methylphenidate or melatonin, so the effects of NF1 itself, comorbidity, and medication cannot be separated. The study did not test an intervention, so it cannot show that any therapy improves working memory, attention, or EEG findings. The main P300 amplitude analysis was null, while latency and topographic findings involved many comparisons, so those differences need replication. EEG n-back accuracy did not differ between groups, so P300 differences are not tied to task performance differences in that session. Reaction time group difference was not significant (p = 0.06), so slower responding in NF1 is not firmly established. The design is cross-sectional, so it cannot show how P300 or working memory changes over development in NF1. The reported age range included a child aged 11.25 years, even though the stated inclusion criterion was 12 to 17 years.

Do not read the shorter P300 latency and topographic differences as proof of a causal NF1 brain mechanism or as a ready-made biomarker. The main P300 amplitude measure showed no group difference, the study had 16 children per group, and no treatment was tested.