نتایج جستجو برای: actigraphy
تعداد نتایج: 1401 فیلتر نتایج به سال:
Study Objectives To compare the accuracy of automatic sleep staging based on heart rate variability measured from photoplethysmography (PPG) combined with body movements measured with an accelerometer, with polysomnography (PSG) and actigraphy. Methods Using wrist-worn PPG to analyze heart rate variability and an accelerometer to measure body movements, sleep stages and sleep statistics were ...
Circadian rhythms and sleep patterns change as people age. Little is known about the associations between circadian rhythms and mortality rates. We investigated whether 24-hour activity rhythms and sleep characteristics independently predicted mortality. Actigraphy was used to determine the stability and fragmentation of the 24-hour activity rhythm in 1,734 persons (aged 45-98 years) from the R...
Background. Sleep disturbances are a key feature of major depression. Electroconvulsive treatment (ECT) may improve polysomnography-assessed sleep characteristics, but its short-term effects on actigraphy-assessed and subjective sleep characteristics are unknown. We therefore aimed to assess the effects of ECT on subjective and objective sleep parameters in a proof-of-principle study. Methods. ...
BACKGROUND Sleep disturbance is commonly observed in patients with asthma, especially in those with poorly controlled asthma. Evaluating sleep quality to achieve good control of asthma is important since nocturnal asthmatic symptoms such as cough, wheezing, and chest tightness may disturb sleep. Actigraphy is an objective, ambulatory monitoring method for tracking a patient's sleep and wake act...
SLEEP EVALUATION IN HUMANS HAS BEEN USUALLY PERFORMED WITH POLYSOMNOGRAPHY (PSG), A TECHNIQUE CONSIDERED THE GOLD STANDARD FOR SLEEP STUDIES. In fact, PSG has been used in clinical trials in spite of its limitations for longitudinal and more naturalistic studies. Actigraphs, instruments to measure wrist motor activity and also called activity monitors, provide an indirect assessment of sleep th...
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