Cardiovascular and Autonomic Response to Environmental Noise During Sleep in Night Shift Workers

Carter, Norman; Henderson, Robyn J.; Lal, Sara; Hart, Michael G; Booth, Sharon; Hunyor, Stephen N.

doi:10.1093/sleep/25.4.444

Cited by 46 publications

(43 citation statements)

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“…Recently, Griefahn et al (2006) compared the effects of road, rail and air traffic and found that physiological sleep parameters were most severely affected by rail noise. It could Communicated by Susan Ward. therefore be predicted that the expected development of railway transportation in the next few years in Europe might represent a potential cardiovascular risk factor for people living alongside the rail tracks, particularly if one considers that the cardiovascular response to noise during sleep is not subjected to habituation (Muzet 1980;Carter et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Cardiovascular responses to railway noise during sleep in young and middle-aged adults

et al. 2009

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The aim of this study was to investigate the effects of nocturnal railway noise on cardiovascular reactivity in young (25.8 +/- 2.6 years) and middle-aged (52.2 +/- 2.5 years) adults during sleep. Thirty-eight subjects slept three nights in the laboratory at 1-week interval. They were exposed to 48 randomized pass-bys of Freight, Passenger and Automotive trains either at an 8-h equivalent sound level of 40 dBA (Moderate) and 50 dBA (High) or at a silent Control night. Heart rate response (HRR), heart response amplitude (HRA), heart response latency (HRL) and finger pulse response (FPR), finger pulse amplitude (FPA) and finger pulse latency (FPL) were recorded to measure cardiovascular reactivity after each noise onset and for time-matched pseudo-noises in the control condition. Results show that Freight trains produced the highest cardiac response (increased HRR, HRA and HRL) compared to Passenger and Automotive. But the vascular response was similar whatever the type of train. Juniors exhibited an increased HRR and HRA as compared to seniors, but there was no age difference on vasoconstriction, except a shorter FPL in seniors. Noise level produced dose-dependent effects on all the cardiovascular indices. Sleep stage at noise occurrence was ineffective for cardiac response, but FPA was reduced when noise occurred during REM sleep. In conclusion, our study is in favor of an important impact of nocturnal railway noise on the cardiovascular system of sleeping subjects. In the limit of the samples studied, Freight trains are the most harmful, probably more because of their special length (duration) than because of their speed (rise time).

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Section: Introductionmentioning

confidence: 99%

Cardiovascular responses to railway noise during sleep in young and middle-aged adults

et al. 2009

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“…Such reactions are identified either as changes in the EEG pattern (as part of a sleep recording), as the occurrence of instantaneous body movements, or as behaviorally confirmed awakenings, and their relative frequency is regarded as an indicator of the severity of the noise effect. A range of laboratory [7,8] and field studies [5,6,9,10,12,17,18,20] reflect this tradition. Awakenings from single noise events, defined as the transition from any stage of sleep to the wake stage, measured by means of polysomnography (PSG), are considered the strongest form of reaction to environmental stimuli during sleep and are one of the most often adopted criteria in night time noise protection concepts.…”

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confidence: 98%

Determining physiological reaction probabilities to noise events during sleep

et al. 2009

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“…The effects of noise were mostly investigated in relation to sleep continuity and sleep structure rather than in relation to sleepiness (81)(82)(83)(84). These studies showed that exposure to noise during sleep (e.g.…”

Section: Arousing Effects Of Environmental Factorsmentioning

confidence: 99%

Regulation of Sleepiness: The Role of the Arousal System

Bakotić¹,

Radošević-Vidaček²

2012

Archives of Industrial Hygiene and Toxicology

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It is generally accepted that two basic physiological processes regulate sleepiness: homeostatic and circadian rhythmic processes. Recent research has proposed the third component regulating sleepiness, that is, the wake drive or the arousal system. The role of the arousal system in regulating sleepiness has partly been addressed by the studies of the pathophysiology of insomnia, which is often described as a disorder of hyperarousal. Experimental and correlational studies on the relation between sleepiness and arousal in good sleepers have generally indicated that both physiological and cognitive arousal are related to the standard measures of sleepiness. Taking into account the role of the arousal system in regulating sleepiness widens the possibilities for the management of sleep disorders and could also help in solving the problem of excessive sleepiness at work and the wheel. KEY WORDS: circadian rhythms, insomnia, shift work, sleep homeostasis, wake driveBakotić M, and Radošević-Vidaček B. WAKE DRIVE IN SLEEPINESS REGULATION Arh Hig Rada Tokiskol 2012;63 Supplement 1: 23-34 Sleep research and sleep medicine often defi ne sleepiness as a state refl ecting physiological sleep need (1). Other terms used in addition to sleepiness are sleep propensity and sleep tendency. Sleepiness is measured by how long it takes to fall asleep, with tests such as the Multiple Sleep Latency Test (MSLT) (2) and the Maintenance of Wakefulness Test (MWT) (3). Sleepiness is also measured by behaviour such as eye closing, yawning, specifi c head movement (bobbing), facial expressions, and performance in various psychomotor and cognitive tasks (4). In the subjective domain, measurements include various single-or multi-facetted sleepiness rating scales (5, 6) and scales assessing the tendency to fall asleep in various situations (7).Although sleepiness is a normal physiological state related to sleep need, in certain cases it can be a symptom of a serious disease or condition. In such cases the term pathological or excessive sleepiness is used. The American Academy of Sleep Medicine defi nes excessive sleepiness as sleepiness that occurs in situations when a person is expected to be awake and alert (8), which interferes with person's daily functioning such as work or school performance, cognitive functioning, mood, and social interaction.Empirical data indicate that sleepiness signifi cantly contributes to vehicle accidents and that mortality in these accidents is very high, especially in persons younger than 25 years (9-12). Furthermore, sleepiness at the workplace is associated with lower performance and greater risk of occupational accidents and injuries, especially in industrial operations and transportation services (10,(13)(14)(15). Shift workers run the greatest risk of sleepiness at the workplace because their working time often coincides with the time of the day when humans are biologically programmed to sleep. 24On the other hand, shift workers often sleep at the time when circadian factors promote wakefulness, which c...

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Cardiovascular and Autonomic Response to Environmental Noise During Sleep in Night Shift Workers

Cited by 46 publications

References 0 publications

Cardiovascular responses to railway noise during sleep in young and middle-aged adults

Cardiovascular responses to railway noise during sleep in young and middle-aged adults

Determining physiological reaction probabilities to noise events during sleep

Regulation of Sleepiness: The Role of the Arousal System

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