STUDIES ON INFLUENCE OF CAFFEINE DURING SLEEP DEPRIVATION

PDF

Authors
  1. LeBlanc, J.
  2. Gil, V.
  3. Samson, P.
Corporate Authors
Laval Univ, Quebec QUE (CAN) Dept of Physiology;Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
Various physiological and psychological variables were measured continuously for 48 hrs in seven young male subjects under the following experimental procedure. In one experiment the subjects were kept on a normal wake-sleep cycle. In a second experiment they were deprived of sleep for 48 hrs & ingested caffeine (3 mg/kg) every four hrs. The third experiment was similar to the second, except that the subjects drank decaffeinated coffee. Sleep deprivation prevented the fall in oxygen consumption deep body temperature and heart rate which were observed during the night in the control experiment. During the wholeperiod of sleep deprivation caffeine was found to increase the levels of oxygen consumption and heart rate presumably because of the stimulating effects of this drug on the sympathetic nervous system activity. The subjective sensations of sleepiness, fatigue and negative mood were progressively increased during sleep deprivation specially at night. TRUNCATED
Date of publication
15 Mar 1989
Number of Pages
62
DSTKIM No
91-01430
CANDIS No
68638
Format(s):
Electronic Document(PDF);Originator's fiche received by DSIS

Permanent link

Document 1 of 1

Date modified: