Conditioning and Retention of Defensive Burying as a Function of the Injection of a Central Cholinergic Stimulant

Summary

Two groups of rats received defensive-burying testing under the effects of saline or physostigmine injection. Saline-injected animals buried more during the first (drug-state) session than did the physostigmine-injected animals. Twenty-four hours later all Ss received a retention test under the nondrug condition. Ss originally tested under the physostigmine state buried more than the saline-injected animals did.