[Comparison of the effects of thyroliberin and ACTH4-7 PGP on the learning of rats during the solving of spatial orientation tasks].

The influence of TRH (100 micrograms/kg) and ACTH4-7 Pro-Gly-Pro (15 micrograms/kg and 25 micrograms/kg) involved an acceleration of the spatial learning on the 12-arm radial maze and on T-maze in rats; an increase in the number of correct choice after short (5-10 min) retention interval; and affected the working and reference spatial memory in the test of reinforced place performance. The effects of the TRH and ACTH4-7 Pro-Gly-Pro did not interfere with one another.