Search PubMed⌕ Search

Biomedical subjects

W B Webb

Publications and source records attributed to W B Webb.

96 records · Page 6Linked to original sources
PubMedDate not supplied

Are there permanent effects of night shift work on sleep?

The sleep structures, patterns and subjective evaluations of 50-60 year old nurses with varying amounts of night shift experience during their nursing careers were compared with the sleep of 50-60 year old females without night shift experience. Seven nurses had extensive prior night shift experience and were currently on night shift schedules, seven nurses had extensive night shift experience but were on current day schedules, five nurses, currently on day schedules, had had limited night shift experience. There were limited differences between the nurses on current day schedules and the non shift women. The current night shift scheduled nurses showed characteristic displaced sleep responses. It was concluded that there is little support for an hypothesis of a permanent effect of night shift work experience on subsequent sleep.

Electroencephalography↗
PubMedDate not supplied

[Changes in temporal organization of sleep stages in man aged from 20 to 70 years [author's transl)].

E.E.G. tracings during sleep were compared in three age groups: 20-30 years, 50-60 years and 60-70 years. There was a marked reduction in stages 3 and 4 as a function of age, an increase in awakenings during the night and in stage I, and a considerable modification in temporal distribution of PS during the night, this being no longer more concentrated at the end of the night but tending to be regularly distributed throughout the night period. The authors emphasize that sleep organization persists in normal subjects up to an advanced age. The average effects of aging (reduction in SWS and increase in awake periods and light sleep) do not necessarily reflect changes occurring in sleep in any given individual. A hypothesis is suggested that the effects of aging rather tend to produce an increase in certain individual sleep characteristics.

Adult↗
PubMedDate not supplied

Relationships between sleep and retirement-nonretirement status.

Two-week sleep diaries and four consecutive nights of laboratory recordings were obtained from a sample of forty (17 males, 23 females) fifty- to seventy-year-old people. Participants were drawn from the same work pool and were divided into age matched retired-employed subsamples. Twenty-nine measures of EEG sleep structure were analyzed using two-way (sex-by-employment status) ANOVA. There were no significant main effects associated with employment status. Sleep pattern measures derived from two-week diaries were analyzed using two-way ANOVA. The two significant work status main effects indicated that retirees spend more time sleeping on weekday nights than employed peers, and that employed participants had later bed times on weekend nights than retirees. The one significant interaction indicated that employed males slept for significantly less time on weekend nights than retired males. There were indications that retirement status decreased the frequency of napping, which may result from their more extended night time sleep period.

Aged↗
PubMedDate not supplied

The first night effect revisited with age as a variable.

The EEG records of 15 younger females and 40 older females were analyzed in an effort to reevaluate the effects of the first night of laboratory sleep, and to determine to what extent age may be a variable in the First Night Effect. These records substantiate earlier findings that sleep latency is longer, there is more wakefulness, and the REM cycle is disrupted on the first night of laboratory sleep. In addition, there is some evidence that older subjects show a greater First Night Effect. These effects adapt out by the second night of sleep.

Adult↗