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  • Title: Learning/memory processes under stress conditions.
    Author: Kaneto H.
    Journal: Behav Brain Res; 1997 Feb; 83(1-2):71-4. PubMed ID: 9062663.
    Abstract:
    Using mice, changes in the learning/memory processes under various stress conditions were investigated in one-trial step-through type passive avoidance learning task. Pre-, post-training and pre-test foot shock (FS)-stress induced long-lasting, at least 96 h, facilitation of test trial latencies. Pre-training psychological (PSY)-stress induces facilitation and pre-test swimming (SW)-stress provokes impairment of test trial latencies. These effects of FS-, PSY- and SW-stress are all dependent on the timing of their exposure and due to their acute effect. Intraperitoneal administration of 1 mg/kg scopolamine 30 min pre-training caused impairment of test latencies in naive and pre-test FS-stressed animals but failed to affect both pre- and post-training FS-induced enhancement. Taken all these data together, it seems that cholinergic mechanism is partly involved in the FS-stress induced facilitation of test latencies, though the research on the changes in ACh levels at the action site in brain after FS-stress exposure is necessary for a definite conclusion.
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