Heart Rate: Changes during Conditioned Suppression in Rats

Science  03 Jun 1966:
Vol. 152, Issue 3727, pp. 1404-1406
DOI: 10.1126/science.152.3727.1404


Heart rate of rats was recorded in the Estes-Skinner conditioned emotional response situation. Response to the conditioned stimulus was a decrease in rate. The change in heart rate was conditioned more slowly than suppression of bar-pressing; it was of shorter duration and was more variable than suppression.