TY  - JOUR
PY  - 1999//
TI  - The effects of a 20-min nap at noon on sleepiness, performance and EEG activity
JO  - International journal of psychophysiology
A1  - Hayashi, Miwa
A1  - Ito, S.
A1  - Hori, T.
SP  - 173
EP  - 180
VL  - 32
IS  - 2
N2  - The prophylactic effects of a 20-min nap at noon on afternoon sleepiness were studied. Ten young adults who had normal sleep-wake habits without habitual daytime napping were subjected to nap and no-nap conditions at an interval of 1 week. After a nocturnal sleep recording (00.00-08.00 h), their EEG recordings during relaxed wakefulness, mood, performance, and self-ratings of performance level were measured every 20 min from 10.00 h to 18.00 h. For the nap condition, they went to bed at 12.20 h and were awakened when 20 min had elapsed from the onset of sleep stage 1. For the no-nap condition, they rested without sleeping by sitting on a semi-reclining chair. The nap did not improve task performance, however, it improved volition and the self-rating of task performance. It also suppressed subjective sleepiness and attenuated eyes-opened EEG alpha activities. The results suggest that a 20-min nap at noon had partial positive effects on the maintenance of the daytime arousal level.<p /> <p>Language: en</p>
LA  - en
SN  - 0167-8760
UR  - http://dx.doi.org/
ID  - ref1
ER  -