Discriminated conditioned suppression in rats.

A discriminated conditioned punishment model of phobia

Traditionally, the signaled avoidance (SA) paradigm has been used in an attempt to better understand human phobia. Animal models of this type have been criticized for ineffectively representing phobia. The SA model characterizes phobia as an avoidance behavior by presenting environmental cues, which act as warning signals to an aversive stimulus (ie, shock). Discriminated conditioned punishment...

Rats’ location during conditioned suppression training

Effects of social rearing conditions on conditioned suppression in rats.

Twenty-two rats were reared in standard conditions during the first two months of their life. Then the animals were divided into two groups exposed to different rearing conditions. Twelve animals (Group SO) were housed socially, six animals per cage, and for three weeks they were subjected to sensory stimulation in an enriched environment. The other ten subjects were kept individually (Group IN...

Generalization of a conditioned inhibitor of response suppression in rats.

Following acquisition of conditioned suppression of barpresses to a visual conditiondd stimulus (CS), rats were subjected to a particular variety of differentiation training procedures. An auditory conditioned inhibitor (CI), which preceded and accompanied the CS on some trials, signaled that inescapable shock will not be given on that trial. When the CI acquired the capacity to attenuate marke...

Effect of naloxone on conditioned suppression in rats.

Painful stimuli are known to engage an endorphin analgesic system that can be reversed by the opiate antagonist, naloxone. Naloxone, then, should increase the effectiveness of aversive unconditioned stimuli (USs) in Pavlovian fear conditioning. Consistent with this hypothesis, naloxone administered during the acquisition of conditioned suppression in rats enhanced posttrial suppression and prec...