Abstract
We report the results of a comparison study between automatic sleep staging using the ambulatory Oxford-Medilog 9200 system and visual analysis in a group of 30 subjects. Sleep analysis was performed during the second nighttime period of each 48-h polygraphic monitoring. The automatic analysis determined a significant underestimation of total sleep time and stage 2 non- rapid eye movement (NREM) sleep and an overestimation of stage I. No significant differences were found between the two analyses regarding slow- wave sleep and REM sleep. The differences between automatic and visual analysis of stage 2 were correlated positively with the amplitude and duration of K-complexes and negatively with the amplitude and frequency of spindles. Differences in electroencephalographic characteristics of these sleep figures were correlated negatively with age. Our results showed that (a) the Oxford-Medilog 9200 sleep staging system did not improve the scoring of stages 1 and 2 NREM sleep and (b) the degree of differences between visual and automatic analysis are related to the amplitude and frequency of sleep figures, i.e., spindles and K-complexes, used in the scoring of stage 2.
Original language | English |
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Pages (from-to) | 227-233 |
Number of pages | 7 |
Journal | Journal of Clinical Neurophysiology |
Volume | 13 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1996 |
Keywords
- Automatic sleep scoring
- Oxford-Medilog
- Visual analysis
ASJC Scopus subject areas
- Clinical Neurology
- Physiology
- Neuroscience(all)