[The elimination of disorders in the acquisition of a conditioned active avoidance reaction by using the C-termination fragment of lysyl vasopressin].

In experiments with male white rats it was shown that 0.001 and 0.01 mg/kg of lysyl vasopressin C-terminal fragment--Pro-Lys-Gly (PLG) being injected intraperitoneally fails to influence the acquisition of active and passive avoidance and also T-maze food rewarded behaviour. The injection of PLG removed by disturbances of active avoidance caused by cyproheptadine and oxytocin. The inhibition of passive avoidance and food-rewarded behaviour was not removed by PLG.