Banca de DEFESA: SABINNE DANIELLE GALINA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : SABINNE DANIELLE GALINA
DATE: 19/04/2022
TIME: 14:00
LOCAL: Sala de aulas do Programa de Pós-graduação em Psicobiologia
TITLE:

RELATIONSHIP BETWEEN MORNING LIGHT EXPOSURE, SLEEP-WAKE CYCLE AND ATTENTION ON ADOLESCENTS FROM NATAL/RN.

KEY WORDS:

temporal sleep pattern; light; light intensity; school start times; attention.

PAGES: 157
BIG AREA: Ciências Humanas
AREA: Psicologia
SUBÁREA: Psicologia Fisiológica
SPECIALTY: Psicobiologia
SUMMARY:

Psychosocial, behavioral and physiological changes related to adolescence contribute to a phase delay in the sleep-wake cycle (SWC). However, morning classes shorten sleep, causing partial chronic sleep deprivation and irregularity, resulting in excessive daytime sleepiness and impairing in cognitive and academic performance. Furthermore, SWC and attention present circadian variation and can be modulated by light-dark cycles. Therefore, this study aims to verify the existence of relations between morning light exposure and SWC and attention in adolescents studying in the morning shift in Natal, RN. The study included 99 adolescents of both sexes (63 girls), aged between 14-18 years (15.7±0.8 years), studying in freshmen and sophomore years of private high school. The students answered the “Health and Sleep” questionnaire and a Sleep Diary, containing the Maldonado sleepiness scale, and used an actimeter for 10 days. Actimetry collected data on SWC and light exposure. Attention was evaluated by a Continuous Performance Task (CPT), on a single application, between 7:30-9:30h during classes. In general, the sample presents poor sleep quality, sleep irregularity, sleep deprivation, and high social jetlag. On free days, high light intensities were associated with sleeping (B=-38.43, p<0.05) and waking up (B=-63.29, p<0.05) earlier on free days and regular time in bed (B=-51.34, p<0.05) as well as tendencies towards morningness (B=-24.91, p=0.07), less sleepiness when waking up on school days (B=-7.83, p=0.09) and regular waking up times (B=-17.67, p=0.09). In addition to shorter reaction time on tonic alertness (B = -32.87, p=0.05) and higher stability in sustained attention (B=-15.90, p=0.06). On the other hand, on school days, high light intensities were related to sleeping later (B=47.84, p<0.01) and shorter sleep duration (B=-41.43, p=0.01) and time in bed (B=-47.22, p<0.01), as well as longer reaction times on tonic (B=58.74, p<0.05) and phasic alertness (B=84.54, p<0.05), and selective attention (B=67.37, p<0.05). On the day of the CPT, high levels of sleepiness upon awakening were related to a higher frequency of omissions on tonic alertness (B=0.31, p<0.05), while lower sleep latencies related to higher percentage of correct responses on phasic alertness (B=-0.16, p<0.05). Furthermore, high light intensities between wake-up and entering the classroom were associated with longer reaction times on tonic alertness (B=95.51, p<0.05), selective attention (B=150.44, p <0.05) and a trend towards phasic alertness (B=53.08, p=0.08). Light during classes (between 7-9:30h) was not associated with changes in attention. Therefore, we suggest that there is a relationship between light exposure in the morning and SWC and attention in adolescents studying in the morning shift, which could contribute to advance rhythms and improve academic performance, however the temporal challenge related to the start of morning classes prevents this expression, masking the effects of light. Thus, additional studies with a larger sample size are needed to confirm these relationships.

BANKING MEMBERS:
Presidente - 1199136 - CAROLINA VIRGINIA MACEDO DE AZEVEDO
Interno - 2998660 - MARIO ANDRE LEOCADIO MIGUEL
Externa ao Programa - 1110960 - JANE CARLA DE SOUZA
Externo à Instituição - FERNANDO MAZZILLI LOUZADA - UFPR
Externa à Instituição - RUBIA APARECIDA PEREIRA DE CARVALHO MENDES