Siestas among Brazilian native Terena adults: a study of daytime napping

Reimão, Rubens; Souza, José Carlos; Gaudioso, Carlos Eduardo Vilela; Guerra, Hellen Da Costa; Alves, Andrea Das Chagas; Oliveira, Jolene Cristina Ferreira; Gnobie, Nilton Cezar Antonio; Silvério, Desirrée Correa Guerra

doi:10.1590/s0004-282x2000000100006

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…They also report fewer actual episodes of behavioral sleepiness during the active phase (i.e., falling asleep against one's will and/or at inappropriate times) compared to men. Moreover, several studies report that men have a higher predisposition for afternoon napping than women [25], [17]. The results from the current study suggest that sex-linked genes have direct regulatory influence s on the sleep-wake cycle and are at least partially responsible for increased compulsions to nap during the active phase (daytime in humans, nighttime in mice) when sleep pressure is high.…”

Section: Discussionsupporting

confidence: 52%

Sex Chromosomes Regulate Nighttime Sleep Propensity during Recovery from Sleep Loss in Mice

et al. 2013

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Sex differences in spontaneous sleep amount are largely dependent on reproductive hormones; however, in mice some sex differences in sleep amount during the active phase are preserved after gonadectomy and may be driven by non-hormonal factors. In this study, we sought to determine whether or not these sex differences are driven by sex chromosome complement. Mice from the four core genotype (FCG) mouse model, whose sex chromosome complement (XY, XX) is independent of phenotype (male or female), were implanted with electroencephalographic (EEG) and electromyographic (EMG) electrodes for the recording of sleep-wake states and underwent a 24-hr baseline recording followed by six hours of forced wakefulness. During baseline conditions in mice whose gonads remained intact, males had more total sleep and non-rapid eye movement sleep than females during the active phase. Gonadectomized FCG mice exhibited no sex differences in rest-phase sleep amount; however, during the mid-active-phase (nighttime), XX males had more spontaneous non-rapid eye movement (NREM) sleep than XX females. The XY mice did not exhibit sex differences in sleep amount. Following forced wakefulness there was a change in the factors regulating sleep. XY females slept more during their mid-active phase siestas than XX females and had higher NREM slow wave activity, a measure of sleep propensity. These findings suggest that the process that regulates sleep propensity is sex-linked, and that sleep amount and sleep propensity are regulated differently in males and females following sleep loss.

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Section: Discussionsupporting

confidence: 52%

Sex Chromosomes Regulate Nighttime Sleep Propensity during Recovery from Sleep Loss in Mice

et al. 2013

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“…Among an agricultural population in Brazil, 72.3% of adults napped during the day at least once per week and 35.9% of males and 20.5% of females napped every day (Reimao et al, 2000). By comparison, in a national telephone poll in the U.S. 55% of adults said they take at least one nap during the week (National Sleep Foundation, 2005).…”

Section: Determinants Of Sleep Deficiencymentioning

confidence: 99%

Sociodemographic and cultural determinants of sleep deficiency: Implications for cardiometabolic disease risk

Knutson

2013

Social Science & Medicine

185

139

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Sleep is a biological imperative associated with cardiometabolic disease risk. As such, a thorough discussion of the sociocultural and demographic determinants of sleep is warranted, if not overdue. This paper begins with a brief review of the laboratory and epidemiologic evidence linking sleep deficiency, which includes insufficient sleep and poor sleep quality, with increased risk of chronic cardiometabolic diseases such as obesity, diabetes and hypertension. Identification of the determinants of sleep deficiency is the critical next step to understanding the role sleep plays in human variation in health and disease. Therefore, the majority of this paper describes the different biopsychosocial determinants of sleep, including age, gender, psychosocial factors (depression, stress and loneliness), socioeconomic position and race/ethnicity. In addition, because sleep duration is partly determined by behavior, it will be shaped by cultural values, beliefs and practices. Therefore, possible cultural differences that may impact sleep are discussed. If certain cultural, ethnic or social groups are more likely to experience sleep deficiency, then these differences in sleep could increase their risk of cardiometabolic diseases. Furthermore, if the mechanisms underlying the increased risk of sleep deficiency in certain populations can be identified, interventions could be developed to target these mechanisms, reduce sleep differences and potentially reduce cardiometabolic disease risk.

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“…Although most available literature concerns western postindustrial populations, recent work has addressed greater ecological and cultural diversity. Reports document normative napping and co-sleeping in populations as diverse as agrarian Brazil (Reimao et al, 2000b;Reimao, Souza, Medeiros, & Almirao, 1998) and urban China or Japan (X. Liu, Liu, Owens, & Kaplan, 2005;Park, Matsumoto, Shinkoda, Nagashima, Kang, & Seo, 2001).…”

Section: Cultural Variation In Regulation Of Sleep and Family Processesmentioning

confidence: 99%

Companionable sleep: Social regulation of sleep and cosleeping in Egyptian families.

Worthman¹,

Brown²

2007

Journal of Family Psychology

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This exploratory study examined family sleep patterns and quality in a setting of normative napping and cosleeping. Participants were 78 members of 16 families from 2 locales in Egypt (Cairo and a village). Each family member provided a history of sleeping arrangements, 1 week of continuous activity records, and details of each sleep event. Sleep records documented late-onset and dispersed sleep patterns with extensive cosleeping. Of recorded sleep events, 69% involved cosleeping, 24% included more than 1 cosleeper, and only 21% were solitary. Mid-late afternoon napping occurred on 31% of days, and night sleep onsets averaged after midnight. Age and gender structured sleep arrangements and, together with locale, extensively explained sleep behavior (onset, duration, total) and quality. Cosleepers had fewer night arousals, shorter and less variable night sleep duration, and less total sleep. Increased solitary sleep in adolescents and young adults was associated with increased sleep dysregulation, including exaggerated phase shifts in males and more nighttime arousals in females. Where normative, cosleeping may provide psychosensory stimuli that moderate arousal and stabilize sleep. Such moderating features may address important self-regulatory developmental needs during adolescence.

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Siestas among Brazilian native Terena adults: a study of daytime napping

Cited by 8 publications

References 15 publications

Sex Chromosomes Regulate Nighttime Sleep Propensity during Recovery from Sleep Loss in Mice

Sex Chromosomes Regulate Nighttime Sleep Propensity during Recovery from Sleep Loss in Mice

Sociodemographic and cultural determinants of sleep deficiency: Implications for cardiometabolic disease risk

Companionable sleep: Social regulation of sleep and cosleeping in Egyptian families.

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