Actigraphy and Insomnia: A Closer Look Part 1

Chambers, Mark J.

doi:10.1093/sleep/17.5.405

Cited by 55 publications

(29 citation statements)

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“…Actigraphy is a reliable instrument for studying sleep-wake patterns continuously over long periods of time in outpatients with a known medical illness or insomnia [9,24]. Actigraphy is more sensitive than subjective data for documenting sleep fragmentation, particularly in patients with insomnia [25]. In validation studies, total sleep time and sleep efficiency calculated by the Sleepwatch software combined with subjective data were not significantly different from data obtained by polysomnography [10,26,27].…”

Section: Discussionmentioning

confidence: 99%

Sleep disturbances and impaired daytime functioning in outpatients with newly diagnosed lung cancer

Guen¹,

Gagnadoux²,

Hureaux³

et al. 2007

Lung Cancer

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Section: Discussionmentioning

confidence: 99%

Sleep disturbances and impaired daytime functioning in outpatients with newly diagnosed lung cancer

Guen¹,

Gagnadoux²,

Hureaux³

et al. 2007

Lung Cancer

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“…CONCLUSION We have shown that repeated engagement in high levels of physical activity counteracts the age-related fragmentation of the circadian rhythm. Although actigraphic assessment is of limited value in the evaluation of sleep quality in the elderly (Chambers, 1994;Hume et al, 1996), it is tempting to conclude that the training-induced improvement of the circadian timing system may be helpful in elderly suffering from those sleep problems that result from underlying circadian rhythm disturbances.…”

Section: Relative Amplitudementioning

confidence: 99%

Long-Term Fitness Training Improves the Circadian Rest-Activity Rhythm in Healthy Elderly Males

et al. 1997

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In old age, the circadian timing system loses optimal functioning. This process is even accelerated in Alzheimer's disease. Because pharmacological treatment of day-night rhythm disturbances usually is not very effective and may have considerable side effects, nonpharmacological treatments deserve attention. Bright light therapy has been shown to be effective. It is known from animal studies that increased activity, or an associated process, also strongly affects the circadian timing system, and the present study addresses the question of whether an increased level of physical activity may improve circadian rhythms in elderly. In the study, 10 healthy elderly males were admitted to a fitness training program for 3 months. The circadian rest-activity rhythm was assessed by means of actigraphy before and after the training period and again 1 year after discontinuation. As a control for possible seasonal effects, repeated actigraphic recordings were performed during the same times of the year as were the pre and post measurements in a control group of 8 healthy elderly males. Fitness training induced a significant reduction in the fragmentation of the rest-activity rhythm. Moreover, the fragmentation of the rhythm was negatively correlated with the level of fitness achieved after the training. No seasonal effect was found. Previous findings in human and animal studies are reviewed, and several possible mechanisms involved in the effect of fitness training on circadian rhythms are discussed. The results suggest that fitness training may be helpful in elderly people suffering from sleep problems related to circadian rhythm disturbances.

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“…The correlation between motions and sleep states has been validated in clinical field. There is a strong correlation of 0.81 between measurement of total sleep time from actigraphy and that from PSG (Polysomnography) [19].…”

Section: Motion Information For Sleep Quality Evaluationmentioning

confidence: 98%

A Sleep Monitoring System with Sleep-Promoting Functions in Noise Detection and Sound Generation

Chen¹,

Chen²

2015

ijacsa

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Abstract-Recently, there has been a growing demand and interest in developing sleep-promoting systems for improving sleep condition. Because sleep environments are various, and sensitivity to noise differs individually, it is difficult for current sleep-promoting systems to provide an adoptable solution. This paper develops a non-invasive sleep monitoring system with adaptive sleep-promoting sound according to sleep environments and sleep habits. For people who fall asleep in a quiet environment, a constant sound playing probably affects their sleep. The proposal is designed to distinguish the noise disturbances, and a sleep-promoting sound is triggered automatically. A device with multiple sensors: an infrared depth sensor, a RGB camera, and a four-microphone array, is used to detect sleep disturbances. When a noise is detected, an ambient sound is playing to cover the noise automatically. Besides, it also applies to people who are used to sleep with sound by providing additional sound playing from the beginning of their sleep. Moreover, from the input of depth signals and color images, the scores are calculated from the sleep information, and are record for sleep quality evaluation. An overnight experiment was carried out, and the results show the efficiency of the proposed system in diverse sleep environments. The adaptable method is feasible for individuals, and it is also convenient and cost-effective to be used in home context.

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Actigraphy and Insomnia: A Closer Look Part 1

Cited by 55 publications

References 0 publications

Sleep disturbances and impaired daytime functioning in outpatients with newly diagnosed lung cancer

Sleep disturbances and impaired daytime functioning in outpatients with newly diagnosed lung cancer

Long-Term Fitness Training Improves the Circadian Rest-Activity Rhythm in Healthy Elderly Males

A Sleep Monitoring System with Sleep-Promoting Functions in Noise Detection and Sound Generation

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