dd transitions
Recently Published Documents


TOTAL DOCUMENTS

2
(FIVE YEARS 0)

H-INDEX

2
(FIVE YEARS 0)

1994 ◽  
Vol 267 (4) ◽  
pp. R945-R952 ◽  
Author(s):  
R. J. Berger ◽  
N. H. Phillips

Sleep patterns and circadian rhythms of body temperature, activity, body weight, and electroencephalographic (EEG) power spectra of pigeons were compared among three photic conditions: a 12:12-h light-dark cycle (LD), followed successively by constant bright (LL) and dim light (DD) periods. LL suppressed non-rapid-eye-movement and rapid eye movement sleep and circadian rhythms of the measured variables without producing increased drowsiness or other physiological or behavioral changes. Sleep patterns after LL-DD transitions also showed no evidence of prior sleep deprivation during LL. Sleep latency after LL-DD transitions was 93 min longer than after L-D transitions in LD. Total sleep and EEG slow wave activity during the first 24 h in DD did not differ from D in LD. Free-running circadian rhythms subsequently reappeared in DD after LL.


Sign in / Sign up

Export Citation Format

Share Document