Daytime noise and subsequent night sleep in man.
01 Jan 1984-European Journal of Applied Physiology (Eur J Appl Physiol Occup Physiol)-Vol. 53, Iss: 2, pp 159-163
TL;DR: The findings support the assumption that strong daytime noise may interfere with subsequent sleep processes and that the autonomic parameters were not clearly affected by the noise exposure.
Abstract: The effects of daytime noise on recovery processes during subsequent undisturbed night sleep were studied in six healthy men (21–27 years), exposed to 80 dB (A) pink noise 8 h per day for 2 days. Sleep EEG, ECG, and respiration were recorded in the laboratory for five consecutive nights: two baseline nights, two nights following noise stimulation, and again one baseline night. Additionally questionnaire data were collected, reflecting a subjective impairment of the recovery function of sleep after noise exposure. EEG sleep data of the first post-noise night showed an increase in slow wave sleep with a simultaneous decrease in stage 2 sleep. During the second post-noise night these changes were less prominent. Three subjects additionally showed an instability in the sleep course coinciding with elevated heart and respiration rates. However, altogether the autonomic parameters were not clearly affected by the noise exposure. The findings support the assumption that strong daytime noise may interfere with subsequent sleep processes.
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01 Jan 1993
Abstract: SummaryIntermittent noise occurring during sleep has been found to induce heart rate, peripheral vasomotor and electroencephalogram (EEG) changes. This study analysed these responses during the daytime and night-time sleep of shiftworkers doing a three shift system, to determine the influence of the inversion of the sleep-wake cycle on the sensitivity to noise. A group of 14 shiftworkers [aged 37 (SD 5) years] underwent an habituation daytime sleep, two experimental daytime sleeps and a night-time sleep. Traffic noises were presented during sleep [truck, 71 dB(A); motorbike, 67 dB(A); and car, 64 dB(A)] at a rate of nine each hour. The EEG measurements of sleep, electrocardiogram and finger pulse amplitude were recorded continuously. The results were expressed by computing the percentage of observed cardiac response (%HRR) and vasoconstrictive response (%FPR), magnitude of heart rate variation (heart rate response; HRR), percentage of reduction of the digital blood flow (finger pulse response, FPR), cardiac cost (CC = % HRR x HRR) and vasomotor cost (VC = % FPR x FPR). The results showed that, compared to night-time sleep, there was change in the structure of daytime sleep, that is an increase in slow wave sleep (SWS), especially stage 4 sleep decrease of stage 2 and rapid eye movement (REM) sleep latencies, and an earlier SWS and REM sleep barycentric point. During daytime sleep the % FPR was significantly smaller in SWS than in stage 2 or REM sleep. Large differences were observed in % HRR, HRR and CC between daytime sleep stages (SWS less than stage 2 less than REM sleep). These differences were not observed during night-time sleep. Moreover, compared to night-time sleep, CC was increased during daytime REM sleep and decreased during daytime SWS. The inversion of the sleep-wake cycle in shiftworkers, did not influence the overall cardiovascular reactivity to noise. This was explained by a compensatory effect due to an increase in this reactivity during daytime REM sleep and its decrease in daytime SWS. The second reason is due to an increase in the percentage of stage 4 sleep during daytime sleep (less disturbed by noise than other sleep stages). This increased percentage of stage 4 sleep was probably a consequence of the partial sleep deprivation occurring after a week working on nightshift.
9 citations
TL;DR: There was change in the structure of daytime sleep, that is an increase in slow wave sleep (SWS), especially stage 4 sleep decrease of stage 2 and rapid eye movement (REM) sleep latencies, and an earlier SWS and REM sleep barycentric point.
Abstract: Intermittent noise occurring during sleep has been found to induce heart rate, peripheral vasomotor and electroencephalogram (EEG) changes. This study analysed these responses during the daytime and night-time sleep of shiftworkers doing a three shift system, to determine the influence of the inversion of the sleep-wake cycle on the sensitivity to noise. A group of 14 shiftworkers [aged 37 (SD 5) years] underwent an habituation daytime sleep, two experimental daytime sleeps and a night-time sleep. Traffic noises were presented during sleep [truck, 71 dB(A); motorbike, 67 dB(A); and car, 64 dB(A)] at a rate of nine each hour. The EEG measurements of sleep, electrocardiogram and finger pulse amplitude were recorded continuously. The results were expressed by computing the percentage of observed cardiac response (%HRR) and vasoconstrictive response (%FPR), magnitude of heart rate variation (heart rate response; HRR), percentage of reduction of the digital blood flow (finger pulse response, FPR), cardiac cost (CC = % HRR x HRR) and vasomotor cost (VC = % FPR x FPR). The results showed that, compared to night-time sleep, there was change in the structure of daytime sleep, that is an increase in slow wave sleep (SWS), especially stage 4 sleep decrease of stage 2 and rapid eye movement (REM) sleep latencies, and an earlier SWS and REM sleep barycentric point. During daytime sleep the % FPR was significantly smaller in SWS than in stage 2 or REM sleep. Large differences were observed in % HRR, HRR and CC between daytime sleep stages (SWS less than stage 2 less than REM sleep).(ABSTRACT TRUNCATED AT 250 WORDS)
9 citations
Cites background from "Daytime noise and subsequent night ..."
...Because of the noise exposure before sleep (Blois et al. 1980; Frushtorfer et al. 1982), this phenomenon could not be quantified in our experiment; 2....
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01 Dec 2004
TL;DR: In this article, the impact of travail poste on le comportement alimentaire, sur les perturbations eventuelles du cycle veille-sommeil, and sur des caracteristiques of l’activite motrice.
Abstract: RESUME
L’objectif principal de notre recherche est d’etudier l’impact du travail poste sur le comportement alimentaire, sur les perturbations eventuelles du cycle veille-sommeil et sur des caracteristiques de l’activite motrice Les participantes a cette recherche sont des infirmieres reparties selon leur poids (Obese ou Normal) et les caracteristiques de leurs horaires professionnels (Alterne ou Regulier) Durant quatorze jours, la mesure de l’activite motrice generale des sujets a ete realisee grâce au port d’un actimetre Ces mesures objectives ont ete mises en relation avec des evaluations subjectives concernant les prises alimentaires et le sommeil, et completees par une apreciation des attributions et des reactions affectives suscitees par l’obesite Les resultats de cette recherche mettent principalement en evidence que la surcharge pourrait etre liee a la destructuration de la prise alimentaire ainsi qu’a des specificites de l’activite generale
6 citations
01 Jan 1998
TL;DR: In this article, a Kapitel enthalt eine kritische bestandsaufnahme dessen, was wir uber Schallwirkungen wissen und wir die Schall wirkung am besten messen konnen, soll ein Nichtfachmann in der Lage sein, das notwendige Verstandnis zu gewinnen, um die Schlusfolgerungen einer Larmbeurteilung nachvollziehen zu konne.
Abstract: Dieses Kapitel enthalt eine kritische Bestandsaufnahme dessen, was wir uber Schallwirkungen wissen und wie wir die Schallwirkung am besten messen konnen. Damit soll ein Nichtfachmann in der Lage sein, das notwendige Verstandnis zu gewinnen, um die Schlusfolgerungen einer Larmbeurteilung nachvollziehen zu konnen.
6 citations
01 Jan 2000
TL;DR: In this paper, the authors examined associations between perceptions of noise exposure, noise sensitivity, sleep disturbance and health in an area where aircraft noise is not particularly prevalent (Bristol, UK).
Abstract: The aim of the present research was to examine associations between perceptions of noise exposure, noise sensitivity, sleep disturbance and health in an area where aircraft noise is not particularly prevalent (Bristol, UK). A questionnaire was mailed to a random community sample and 543 responses were received. This sample was found to be a representative sample of the general population. Preliminary analyses suggested that perceptions of aircraft noise while trying to sleep, noise sensitivity and noise-disturbed sleep were all having significant effects on subjective health. The effects of noise exposure and noise sensitivity were entirely due to neuroticism. However, sleep disturbance due to noise was still related to health even when negative affectivity was co-varied. This confirms results obtained with another sample and investigations of noise exposure in general. Further research is considering whether a similar pattern holds when exposure levels are higher. A longitudinal study is desirable to detetmine the causal relationships linking noise disturbed sleep and health. For the covering abstract see ITRD E107776.
3 citations
References
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01 Jan 1968
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01 Jan 1964TL;DR: The purpose here is to describe a few of these methods which have been used by experimentalists in biological and physical research and whether these results indicate a superiority of sample A over sample B?
Abstract: The last twenty years have seen a great increase in the use of statistical methods in various branches of science and technology. One of the obstacles to the more widespread use of these methods is the complex and laborious nature of the computations which are often required in order to make use of the customary textbook methods. It is not always realized that rapid approximate methods are available for many situations.4 Such approximate methods, however, sacrifice some of the information contained in the data. The purpose here is to describe a few of these methods which have been used by experimentalists in biological and physical research. Signi$canceof Differences. Many experiments are designed to test whether one category differs from another in regard to some measurable quantity. These categories may be, for example: the tensile strength of two types of metal or plastic; the effect of a proposed drug or treatment compared with one now in use; or the comparison of the effect of two fertilizer mixtures on the yield of a certain crop. In all such cases the logic underlying the experiment is usually the same. The assumption is made that the two categories (materials, drugs, or fertilizers) do not differ. An experiment is performed leading to a set of replicated measurements under each category. A statistical constant is calculated from the results, and the probability of obtaining a value as large or larger than that obtained is used as a guide in accepting or rejecting the original assumption. If this probability is sufkiently small, the hypothesis that the two materials are the same is abandoned and a decision is reached that they are different. The particular probability level a t which the hypothesis is abandoned is, of course, a matter of choice, and is determined in part by the seriousness of the consequences should a wrong decision be made, the time and expense involved in the experiments, etc. Efficient statistical tests are described in current textbooks, but these tests often require considerable computation. The tests to be described here are quite simple but often adequate for the purpose in view. Tests Based on Rank Vumbers. An example from entomological work will serve to illustrate these methods. Two household fly sprays had been tested on houseflies, and the tests were replicated eight times for each material. The results obtained, expressed as per cent mortality of the houseflies, are shown in TABLE 1. The average per cent mortality for sample A is 67.7 per cent, while for sample B it is 61.7 per cent. The question to be decided is whether these results indicate a superiority of sample A over sample B? or whether the results are merely due to chance fluctuations and would not hold true in the long run. We may assign rank numbers 1 to 16 to the 16 results in order of magni-
1,021 citations
"Daytime noise and subsequent night ..." refers methods in this paper
...For further analysis of the data, mean values of the different parameters were calculated and significance was tested by comparing paired replicates (Wilcoxon and Wilcox 1964)....
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TL;DR: The present findings support the hypothesis that the EEG power density in the low frequency range is an indicator of a progressively declining process during sleep whose initial value is determined by the duration of prior waking.
992 citations
TL;DR: The runners showed less rapid eye-movement activity during sleep than the nonrunners under both experimental conditions, indicating a strong and unexpected effect of physical fitness on this measure.
Abstract: We tested the hypothesis that EEG sleep stages 3 and 4 (slow-wave sleep, SWS) would be increased as a function of either acute of chronic exercise. Ten distance runners were matched with 10 nonrunners, and their sleep was recorded under both habitual (runners running and nonrunners not running, 3 night) and abruptly changed (runners not running and nonrunners running, 1 night) conditions. Analyses of both visually scored SWS and computer measures of delta activity during non-rapid eye-movement (NREM) sleep failed to support the SWS-exercise hypothesis. The runners showed a significantly higher proportion and a greater absolute amount of NREM sleep than the nonrunners. The runners showed less rapid eye-movement activity during sleep than the nonrunners under both experimental conditions, indicating a strong and unexpected effect of physical fitness on this measure. Modest afternoon exercise in nonrunners was associated with a strong trend toward elevated heart rate during sleep. Mood tests and personality profiles revealed few differences, either between groups or within groups, as a function of exercise.
222 citations