[The effect of the opioid neuropeptides: met-enkephalin and beta-endorphin on the conditioned reflex activity of hedgehogs].

The effect of opioid neuropeptides was found to be more obvious in functional pathology of the higher nervous activity in hedgehogs. Met-enkephalin exerted a more obvious and longer-lasting effect on complicated forms of nervous activity, particularly inherent those. Naloxone abolished the met-enkephalin effect. The comparative effect of different opioid neuropeptides on inherent and acquired forms of nervous activity in mammals, the correlation between structural distribution of the neuropeptides and their functional properties, are discussed.