Pattern of slow-wave sleep in afternoon naps
Article first published online: 10 JUL 2008
© 2008 The Authors. Journal compilation © 2008 Japanese Society of Sleep Research
Sleep and Biological Rhythms
Volume 6, Issue 3, pages 187–189, July 2008
How to Cite
FUSHIMI, A. and HAYASHI, M. (2008), Pattern of slow-wave sleep in afternoon naps. Sleep and Biological Rhythms, 6: 187–189. doi: 10.1111/j.1479-8425.2008.00350.x
- Issue published online: 10 JUL 2008
- Article first published online: 10 JUL 2008
- Accepted for publication 4 April 2008.
- sleep inertia;
- sleep spindle;
- slow–wave sleep
A short daytime nap of less than 30 min can prevent later sleepiness. However, severe sleep inertia often occurs after awakening from slow–wave sleep (SWS). The present study examined the appearance pattern of SWS during daytime hours. Polysomnograms of university students (n = 101) showed that SWS did not appear during a nap of less than 15 min, but did appear at least 9 min after the first sleep spindle. These results suggest that a short nap (less than 15 min) does not produce sleep inertia.