Sleep and wakefulness in 509 normal human adults

Tune, G. S.

doi:10.1111/j.2044-8341.1969.tb02060.x

Cited by 87 publications

(48 citation statements)

References 5 publications

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“…between 20 and 34 y reported between 7.37 and 7.48 h sleep/ In contrast to these cultures, the Mexican college student night (Reyner and Horne 1995). In an earlier study in the sleep schedules seemed similar to those reported for the United United Kingdom, Tune (1969) reported a mean 7.7 h per night Kingdom, Sweden and Australia. For those adults between 20 for the sleep of healthy men 20-29 y.…”

Section: Regression Summarysupporting

confidence: 68%

The siesta culture concept is not supported by the sleep habits of urban Mexican students

Valencia‐Flores

Castaño

Campos

et al. 1998

Journal of Sleep Research

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SUMMARY Evidence in support for the concept of the so-called 'siesta culture' is not well developed and has, to date, relied largely on qualitative anthropological data. Presumably such cultures are characterized by a strong tendency for daytime naps and daytime sleepiness, phenomena which may partially represent the effects of geographic, climatic or light conditions and/or cultural influences. In this study we surveyed the nocturnal sleep habits and daytime sleep tendencies of 577 Mexican college students residing in Mexico City (19°N latitude). Results indicated a number of parallels between the reported sleep habits of these students and those reported from other cultures at latitudes far to the north (North America, Europe), such as longer sleep at the weekends, an association between snoring and daytime sleepiness and a lack of relationship between nocturnal sleep duration and the reported tendency to nap. There was some suggestion that these Mexican students may actually nap less when compared to other college student populations. Taken together, these results call into question what is meant by the concept of a 'siesta culture', at least in this urban, educated, upper social economic scale (SES) population, and suggest that future studies in equatorial regions be undertaken to further appreciate the role of climate, photoperiod and/or culture in the tendency for humans to nap during the day.

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Section: Regression Summarysupporting

confidence: 68%

The siesta culture concept is not supported by the sleep habits of urban Mexican students

Valencia‐Flores

Castaño

Campos

et al. 1998

Journal of Sleep Research

View full text Add to dashboard Cite

show abstract

“…No change or a reduction in sleep duration with increasing age is generally reported (13,19). Furthermore, in contrast to the results of the simulations, sleep end is generally advanced in middle-aged subjects as compared to young subjects (19,22). Obviously, only changing the decay rate, and leaving the remaining model parameters unchanged does not produce any of the characteristics of sleep timing in aged subjects.…”

Section: Discussionmentioning

confidence: 63%

“…The results of these simulations are at variance with existing data on the timing of sleep in older subjects. No change or a reduction in sleep duration with increasing age is generally reported (13,19). Furthermore, in contrast to the results of the simulations, sleep end is generally advanced in middle-aged subjects as compared to young subjects (19,22).…”

Section: Discussionmentioning

confidence: 64%

All night spectral analysis of EEG sleep in young adult and middle-aged male subjects

Dijk

Beersma

Hoofdakker

1989

Neurobiology of Aging

162

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“…Previous studies have reported earlier waketime and less time spent in bed with increasing age over the adult life span (Tune 1969;Reyner and Horne 1995). Previous studies have also shown sleep consolidation, delta sleep (particularly Stage 4 sleep) and REM sleep to be modified in middle-aged subjects when compared with young subjects (Agnew el ul.…”

Section: Discussionmentioning

confidence: 99%

Sleep and morningness‐eveningness in the ‘middle’ years of life (20–59y)

Carrier

Monk

Buysse

et al. 1997

Journal of Sleep Research

259

128

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SUMMARYThe following four issues were assessed in a group of 110 adults between the age of 20 and 59y: (1) the effect of age (regarded as a continuous variable) on polysomnographic sleep characteristics, habitual sleep-diary patterns, and subjective sleep quality; (2) the effects of age on morningnessseveningness; (3) the effects of morningness-eveningness on sleep, after controlling for the effects of age; and (4) the role of morningness eveningness as a mediator of the age and sleep relationship.Increasing age was related to earlier habitual waketime, earlier bedtime, less time in bed and better mood and alertness at waketime. In the laboratory, increasing age was associated with less time asleep, increased number of awakenings, decreased sleep efficiency, lower percentages of slow-wave sleep (SWS) and rapid eye movement (REM) sleep, higher percentages of Stage 1 and 2, shorter REM latency and reduced REM activity and density. Increasing age was also associated with higher morningness scores. After controlling for the effects of age, morningness was associated with earlier waketime, earlier bedtime, less time in bed, better alertness at waketime, less time spent asleep, more wake in the last 2 h of sleep, decreased REM activity, less stage REM (min and percentage), more Stage 1 (min and percentage) and fewer minutes of Stage 2. For one set of variables (night time in bed, waketime, total sleep time, wake in the last 2 h of sleep and minutes of REM and REM activity), morningness-eveningness accounted for about half of the relationship between age and sleep. For another set of variables (bedtime, alertness at waketime, percentages of REM and Stage l), morningnessseveningness accounted for the entire relationship between age and sleep. In conclusion, age and morningness were both important predictors of the habitual sleep patterns and polysomnographic sleep characteristics of people in the middle years of life (20-59 y).

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Sleep and wakefulness in 509 normal human adults

Cited by 87 publications

References 5 publications

The siesta culture concept is not supported by the sleep habits of urban Mexican students

The siesta culture concept is not supported by the sleep habits of urban Mexican students

All night spectral analysis of EEG sleep in young adult and middle-aged male subjects

Sleep and morningness‐eveningness in the ‘middle’ years of life (20–59y)

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