Location of Repository

Behavioral and Cardiac Responses to a Sudden Change in Environmental Stimuli: Effect of Forced Shift in Food Intake

By J.M. Steenbergen, J.M. Koolhaas, J.H. Strubbe and B. Bohus

Abstract

In order to test the possibility of a change in stress susceptibility induced by a forced change in activity rhythm, during control weeks food availability was restricted to the dark period only (fa-D) and to the light period only during the test week (fa-L). Stress susceptibility was measured on the basis of the decrease in heart rate (bradycardia) and an increase in freezing behavior in response to a sudden reduction in background noise. A significant increase in bradycardia both in magnitude and duration was observed during fa-L conditions as compared to the control fa-D condition. Also the duration of freezing behavior was increased during the fa-L condition. These results support the hypothesis that forced changes in circadian activities affect stress susceptibility. The significance of this finding for the incidence of stress pathologies is discussed.

Year: 1989
OAI identifier: oai:ub.rug.nl:dbi/4cf8c8ffe569a
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://cbn.eldoc.ub.rug.nl/roo... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.