Auditory awakening thresholds in REM and NREM sleep stages.
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Adult↗
Biomedical subjects
P Hauri
Publications and source records attributed to P Hauri.
Actigraphic assessment of sleep in insomnia: application of the Actigraph Data Analysis Software (ADAS).
The usefulness of the actigraph methodology has been demonstrated in normal individuals. However, the validity of actigraphy has been questioned in insomnia patients because of the considerable measurement error that has been reported between actigraphy (ACT) and polysomnography (PSG). Two independent investigations have reported errors of 48 and 49 min in total sleep time between ACT and PSG. With a new scoring method called the Actigraph Data Analysis Software, a reanalysis of one of these studies was conducted. Based on this reanalysis, we have obtained a measurement error of only 25 min between the two methods. This finding may be an indication of the advantage of this new scoring method. A strong correlation coefficient (r = 0.82, p < 0.0001) was noted between ACT and PSG for total sleep time, thus suggesting a high degree of accuracy of the actigraph methodology in assessing the sleep/wake profile of insomniacs.
Arousal↗
Psychophysiological parallels in dreams.
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Adult↗
The wakeful "type A" student.
Eight type A students and eight that were type B slept in the laboratory for three consecutive nights. Type A showed more fragmented sleep, i.e., more spontaneous awakenings from sleep. No differences in REM pressure between As and Bs could be demonstrated, contradicting the hypothesis that both the personality traits of type A individuals and their coronary-proneness might be explained by chronic REM deprivation of type A individuals.
Humans↗