[The effect of the perfusates from tetanized donor slices on the induction of long-term potentiation in recipient slices].

Perfusate collected during tetanic stimulation of the lateral olfactory tract from the donor rat olfactory cortex induced long-term changes of the focal potentials in recipient slices: the perfusate of the depression response to the tetanization-induced potentiation, and vice versa, in the recipient slices. The donor slices seem to release some active substances during tetanization which are able to modulate the electric activity in the recipient slices.