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Spatiotemporal changes of slow wave activities before and after 14 Hz/12 Hz sleep spindles during stage 2 sleep
Author(s) -
Ueda Kazutaka,
Nittono Hiroshi,
Hayashi Mitsuo,
Hori Tadao
Publication year - 2001
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1046/j.1440-1819.2001.00817.x
Subject(s) - sleep spindle , electroencephalography , sleep (system call) , k complex , slow wave sleep , delta wave , sleep stages , arousal , audiology , psychology , non rapid eye movement sleep , neuroscience , medicine , polysomnography , computer science , operating system
The present study examined the spatiotemporal changes of slow wave (delta and theta bands) activities before and after 14 Hz/12 Hz sleep spindles during stage 2 sleep, using topographic mapping of electroencephalogram (EEG) power. Both types of sleep spindles appeared after slow wave activities of background EEG decreased. Moreover, the appearance of sleep spindles provided increasing EEG slow wave activities in the subsequent period. Further, the present results showed that an appearance of 14 Hz sleep spindle facilitated slow wave activities at the centro‐parietal areas, while an appearance of 12 Hz sleep spindle facilitated slow wave activities at the fronto‐central areas. These results suggest that sleep spindles provide cortical de‐arousal, and serve to maintain sleep.