Full text
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| Author(s): |
Fernanda de Jesus Torres
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Psicologia (IP/SBD) |
| Defense date: | 2005-09-28 |
| Examining board members: |
Luiz Silveira Menna Barreto;
Fernando Mazzilli Louzada;
Emma Otta
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| Advisor: | Luiz Silveira Menna Barreto |
| Abstract | |
The sleep/wake cycle (SWC) changes along adolescence. During weekdays there is higher diurnal sleepiness and shorter sleep duration than on weekends; moreover, they display sleep phase delay. Some authors believe these changes result from the interaction between biological and environmental factors. In this work, we observed the SWC in 21 adolescents from the ethnic group Guarani living in Boa Vista village (São Paulo) who live in a rural area, without electric light. We intended to verify whether they show a SWC pattern similar to that found in urban adolescents or if these characteristics are less evident under their condition as has been reported for rural area adolescents. We applied Sleep Habits and Morningness-Eveningness questionnaires. The participants kept Sleep Diaries and wore wrist actimeters for at least 10 consecutives days, and collected oral temperature every 3 hours when awake. This protocol was applied on 3 occasions with 6 months intervals between them. We examined the actograms from Diaries and Actimetries, comparing them with t Student test; we evaluated the temperature oscillations by Cosinor Method, we used Pearsons and Spearmans correlations in order to identify relationships between the measures, adopting the significance level at α=0.05. We compared the occasions and considered our results in the context of adolescent sleep researches. We observed sleep and temperature phase delays in Guarani adolescents similar to the delays found in other groups, as well as shorter sleep duration on weekends than on weekdays. Our results point to the importance of biological factors on sleep/wake and temperature phase delays along adolescence. (AU) | |