HEART RATE RESPONSES OF THE CURARIZED RAT

Heart rate of curarized and non-curarized rats was recorded while both groups were exposed to classical conditioning procedures with tone as the conditional stimulus (CS) and shock as the unconditional stimulus (UCS). The unconditional HR response of curarized animals to the tone was significantly greater than that of the non-curarized animals, while the HR response to shock of the curarized animals was significantly less than that of the non-curarized group. Both groups showed evidence of conditioning over 30 conditioning trials.