Impaired attention in pediatric narcolepsy type 1
Elizabeth Montesano Scheibe1,2, Bo Zhang1, Grace Wang1
1Department of Neurology, Boston Children's Hospital, Boston, MA, USA.
Summary
Adolescents with Narcolepsy Type 1 (NT1) demonstrate significant attention deficits on the Psychomotor Vigilance Task (PVT). These impairments correlate with increased daytime sleepiness and disrupted sleep quality, highlighting a need for further investigation into underlying mechanisms.
Area of Science:
- Neurology
- Sleep Medicine
- Neuroscience
Background:
- Narcolepsy Type 1 (NT1) is associated with frequent attentional complaints in adolescents.
- Objective data quantifying attention deficits in pediatric NT1 patients are limited.
Purpose of the Study:
- To objectively assess attention in adolescents with NT1 using the Psychomotor Vigilance Task (PVT).
- To investigate the relationship between attention, subjective sleepiness (Epworth Sleepiness Scale), and objective sleep quality (PSG data).
Main Methods:
- Twenty-six NT1 participants and 16 healthy controls (HC) underwent 3-min PVT testing.
- Polysomnography (PSG) data were analyzed for sleep to Wake/N1 transitions and N1 percentage.
- Linear mixed models were used to compare groups and assess correlations.
Main Results:
- NT1 participants exhibited significantly more attention lapses and slower reaction times on the PVT compared to HC.
- Poorer PVT performance correlated with higher ESS scores and increased Wake/N1 transitions and N1 percentage.
- Findings remained significant after adjusting for potential confounders.
Conclusions:
- Adolescent NT1 patients show objectively impaired attention compared to HC, as measured by the PVT.
- While sleepiness and poor sleep quality contribute, additional factors likely influence attention deficits.
- Deficient orexin signaling is a potential direct contributor to attention impairments in NT1.
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