Comparative study of the roles of ACTH and β-endorphin in regulating conditioned reflex activity in the hedgehog

被引:7
作者
Sollertinskaya T.N. [1 ]
机构
[1] Laboratory for Comparative Cerebellar Physiology, I. M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, St. Petersburg
关键词
ACTH; Conditioned reflex activity; Conditioned reflex traces; Limbic cortex; Neuropeptides; β-endorphin;
D O I
10.1007/BF02461924
中图分类号
学科分类号
摘要
Data on the relative effects of the neurohormone ACTH1-39 and the opioid peptide β-endorphin on conditioned reflex activity in the hedgehog are presented. It was demonstrated that administration of ACTH (30-50 μg/kg s.c.) led to facilitation of learning and strengthening of memory processes (conditioned reflex traces). ACTH promoted strengthening of movement, orientational-investigative, and intersignal activities, produced hyperalgesia, and blocked the effects of naloxone. Administration of β-endorphin (30-40 μg/kg s.c.) lengthened the latent periods of conditioned reflexes, produced a pronounced analgesic effect, and reduced movement and intersignal activities. The effects of β-endorphin were eliminated by dosage with naloxone. Administration of β-endorphin blocked the inhibitor effects of stimulation of the limbic cortex; doses of ACTH produced partial release of inhibitory effects. The differences between the effects of ACTH and β-endorphin on higher nervous activity are discussed, as are the possible mechanisms of these effects. ©1997 Plenum Publishing Corporation.
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页码:663 / 671
页数:8
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