RESPIRATORY ACTIVITY VARIATIONS INDUCED IN GROUPS OF LD-12-12 SYNCHRONIZED SPRAGUE-DAWLEY RATS BY A 100-DB WHITE NOISE EMITTED AT 12-H INTERVALS

  • 1 January 1980
    • journal article
    • research article
    • Vol. 7  (3) , 337-342
Abstract
A white noise is emitted during 2 h, either in the middle of the scotoperiod (activity period) or of the photoperiod (rest period), on grouped specific pathogen free (SPF) male Sprague-Dawley rats, LD 12:12 synchronized by light (L = 6 h = 150 lx). Continuous measurements of .ovrhdot.VCO2 [CO/2 volume], taken as an index of respiratory activity shows: a short increase both after the beginning and the end of the stimulus, with slight time length differences between young and older rats and a slight (2-3%) continued increase during the photoperiod and a high decrease (13%) during the scotoperiod. These .ovrhdot.VCO2 variations obtained during and after the white noise emission correspond to measurements of activity displacement and observations of behavior performed on a small sample of rats.

This publication has 1 reference indexed in Scilit: