Daytime sleepiness in healthy university students: A multiparametric study
- 1 June 1991
- journal article
- Published by Springer Nature in The Italian Journal of Neurological Sciences
- Vol. 12 (3) , 303-309
- https://doi.org/10.1007/bf02337778
Abstract
A multiparametric investigation of daytime sleepiness was performed in 18 healthy young university students. After undergoing a standard polysomnographic recording at home the night before, all subjects were evaluated by Multiple sleep latency test (MSLT) at 10.00, 12.00, 14.00, 16.00, 18.00. Subjective sleepiness (by using Visual Analogue Rating Scale) and performance tasks (Cancellation Test, Digit Symbol Substitution, Choice Reaction Time, Critical Flicker Fusion Threshold) were also assessed at the same times. Mean daily sleep latency was found to be about 10 minutes, with several individual values in the borderline range (>5 >10 minutes). Subjects did not rate themselves as excessively sleepy and there was no correlation between subjective and objective estimates of sleepiness. No consistent correlation was found between subjective-objective sleepiness and results of performance tests. Anxiety trait (Spielberg State Anxiety Trait) did not correlate with sleepiness, but higher anxiety scores were significantly associated with poor performance. These results confirm the occurrence of fairly marked objective drowsiness in healthy young subjects which, however, was not associated with subjective sleepiness and did not adversely affect performance on a variety of tests of CNS function. Dati della letteratura indicano che al Test di Latenza Multipla al Sonno (MSLT) soggetti giovani sani studenti di college, mostrano valori indicativi di sonnolenza diurna ai limiti superiori della norma in rapporto a restrizione cronica delle loro ore di sonno notturno dovute allo stile di vita. Nella presente indagine il livello di vigilanza diurna di soggetti giovani studenti universitari è stata testata con MSLT preceduto da poligrafia dinamica notturna domiciliare. I dati confermano l'esistenza di valori MSLT indicativi di spiccata, anche se ancora nei limiti della norma, sonnolenza diurna. Tuttavia la parallela valutazione soggettiva del livello di sonnolenza (tramite scala analogica visiva) e di test di performance (Cancellation Test, Digit Symbol Substitution, Choice Reaction Time, Critical Flicker Fusion Threshold) non ha fatto rilevare correlazioni significative con le misure MSLT. Il rendimento ai tests di performance è risultato invece essere significativamente influenzato dal tratto d'ansia (Spielberg State Anxiety Trait). I dati indicano che i livelli di sonnolenza indicati dal test neurofisiologico oggettivo, sono ben tollerati soggettivamente dai soggetti e non hanno un impatto consistente negativo su performance di tipo elementare.Keywords
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