AIMS Data on sleep at altitude are scant due to the limited availability of polysomnography. Therefore, we investigated whether actigraphy might serve as a simple tool for monitoring sleep during altitude field studies. METHODS Fourteen mountaineers participating in studies on dexamethasone prophylaxis of high altitude pulmonary edema were monitored by actigraphy and polysomnography during 1 ...

OBJECTIVE The aim of this work was to investigate cardiovascular risk factors and oxidative stress parameters as well as sleep disturbances in polysomnography recordings of 38 postmenopausal women with insomnia. METHODS Polysomnography recordings were performed on subjects for sleep analysis. Oxidative stress parameters were analyzed by measuring blood concentration of catalase, superoxide di...

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Data from 15 modern studies are used to characterize the deviations from Webcr's law for intensity discrimination of 1000-Hz tone pulses. The results show that Weber's law is satisfied in the region 10-40 dB SL, that resolution descreases with decreasing intensity below 10 dB SL and increases with increasing intensity' above 40 dB SL, and that resolution at 90 dB SL is roughly 2.5 times better ...

In their paper on the influence of the moon on sleep, Cordi et al.[1] have analyzed a large number of subjects and found no significant effects, as opposed to our positive study findings with a smaller cohort [2]. More is not necessarily better. There are two main reasons why we think the comparison of these two data sets is not just comparing a small with a big sample size, since increasing th...

The objective of the present study was to evaluate if anterior load carriage would increase the likelihood of slips or falls while walking over a slippery floor surface. The study hypothesized that anterior load carriage may alter spatial-temporal characteristics, such as heel contact velocity, walking velocity (i.e., the whole body center-of-mass velocity), and step length, as well as friction...

Background and Objectives The aim of this study was to identify the frequency indicators National Health Insurance (NHI) coverage for positive airway pressure (PAP) therapy investigate changes in patients receiving PAP after alterations were made insurance benefit standards mild obstructive sleep apnea (OSA).Subjects Method We divided OSA into two groups according altered categorization (Mild1:...

Electroencephalographic (EEG) activity in wakefulness and in sleep in humans was initially described in 1928. The earliest overnight sleep studies were performed in the 1930s using a polygraph to record EEG activity and electro-oculograms (EOG) on paper. Major milestones in the history of sleep medicine include the identification of rapid eye movement (REM) sleep in 1953, the description of nor...

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