Relação entre cronotipo e o ciclo sono-vigília, sonolência diurna e atenção em adolescentes do turno matutino

• Ano de defesa: 2021
• Autor(a) principal: Silva Júnior, Emanuel Linegley Ribeiro da
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Rio Grande do Norte; Brasil; UFRN; PROGRAMA DE PÓS-GRADUAÇÃO EM PSICOBIOLOGIA
• Palavras-chave em Português: Ritmo circadiano; Padrão temporal de sono; Performance cognitiva; Privação de sono; Vespertinidade
• Link de acesso: https://repositorio.ufrn.br/handle/123456789/43677

One of the most remarkable characteristics in adolescents is the phase delay in the sleep-wake cycle, which can lead to changes in the chronotype, which starts to present a tendency to eveningness. This tendency to eveningness when confronted with school starts time can lead to a reduction in sleep time, social jetlag, diurnal sleepiness, which in turn can lead to worse cognitive and academic performance. Therefore, this study aimed to assess the relationship between the chronotype and the sleep-wake cycle (SWC), diurnal sleepiness and attention in adolescents in the morning shift of schools in Natal. 207 adolescents of high school (age: 15.7 ± 1.3 years; 133 girls) participated in the study. The participants answered the questionnaires: “Health and Sleep”, the Food Consumption Questionnaire, the Sleep Diary for 10 days, which contained the Maldonado Sleepiness Scale. The midsleep on free days sleep corrected (MFSc), used as chronotype indicator and basis for calculating social jetlag were calculated from the data of the sleep diary. Attention was assessed by the Continuous Performance Task, between 7:30 AM and 9:30 AM during school days with a single application. In general, the sample had times to go to bed and get up earlier, less time in bed and more sleepiness on awaking during the week (Anova, p <0.0001). In relation to the chronotype, the evening types go to bed and wake up later, regardless of the day of the week, with higher irregularity in bedtime and waking times, and higher level of Social jetlag (Anova - Sidak, p <0.0001). On the other hand, morning types had more time in bed at the weekend and more irregular time in bed (Anova - Sidak, p <0.01). Regarding attention, the longer time in bed at the night before the task predicted a higher percentage of correct responses for phasic alertness (β = 0.038, p <0.01). However, a greater tendency to eveningness predicted a higher percentage of correct responses in the tonic alertness (β = 0.022, p <0.01), selective attention (β = 0.009, p <0.01) and phasic alertness (β = 0.036, p <0.05), and a lower percentage of omissions in selective attention (β = -0.010, p <0.01). Although the chronotype was related to the wakefulness and attention cycle in adolescents, further studies are needed to investigate the relationship between eveningness and attention.