Relationships between sleep/wake and feeding cycles of identical twins - a longitudinal study (2005)
- Authors:
- Autor USP: BARRETO, LUIZ SILVEIRA MENNA - ICB
- Unidade: ICB
- Assunto: FISIOLOGIA
- Language: Inglês
- Abstract: In order to detect possible individual differences in the development of sleep/wake rhythmicity it seems desirable to control intervening variables as much as possible. Identical twins may constitute a good model to detect the appearance of such differences. There are no reports on the evolution of the sleep/wake cycle (SWC) in identical twins to our knowledge. A pair of identical healthy twins (girls), born at gestational age of 38wks, were continuously observed by their mother and had all sleep and feeding episodes recorded in a diary for six consecutive months starting at the fourth week of life. The twins slept in the same independent room and their caregivers were the same persons. Feeding episodes occurred upon self-demand.Analyses were performed in blocks of seven consecutive days. In each of these blocks sleep and feeding episodes were transformed in two binary time series (awake=1/sleep=-1 and feeding=1/non-feeding=-1), each time point represented the prevailing state in 10min intervals. The time series were analyzed by means of Ciclograma (Diambra, Lopes & Menna-Barreto, Chronob. Int., 19[4], 2002) and Lomb-Scargle Periodogram. Measures of sleep durations and index of simultaneity of the SWC, as well as measures of awakenings tendencies of nursing were also used. We found remarkable similarities in the evolution of the circadian component of the SWC for the two girls, but not in the evolution of the ultradian components,probably in function of the feeding cycle.
- Imprenta:
- Publisher: Comissão de Cultura e Extensão Universitária do ICB/USP
- Publisher place: São Paulo
- Date published: 2005
- Source:
- Título do periódico: Resumos
- Conference titles: Congresso do Instituto de Ciências Biomédicas
-
ABNT
BRAZ, M et al. Relationships between sleep/wake and feeding cycles of identical twins - a longitudinal study. 2005, Anais.. São Paulo: Comissão de Cultura e Extensão Universitária do ICB/USP, 2005. . Acesso em: 23 abr. 2024. -
APA
Braz, M., Lopes, J. R., Torres, F., Bueno, C., Wey, D., Miguel, M., et al. (2005). Relationships between sleep/wake and feeding cycles of identical twins - a longitudinal study. In Resumos. São Paulo: Comissão de Cultura e Extensão Universitária do ICB/USP. -
NLM
Braz M, Lopes JR, Torres F, Bueno C, Wey D, Miguel M, Duarte L, Isola A, Affini L, Menna Barreto LS. Relationships between sleep/wake and feeding cycles of identical twins - a longitudinal study. Resumos. 2005 ;[citado 2024 abr. 23 ] -
Vancouver
Braz M, Lopes JR, Torres F, Bueno C, Wey D, Miguel M, Duarte L, Isola A, Affini L, Menna Barreto LS. Relationships between sleep/wake and feeding cycles of identical twins - a longitudinal study. Resumos. 2005 ;[citado 2024 abr. 23 ] - School schedule transition and adolescent's biological rhythms
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