Inhibition of PKC and CRF receptors but not of CaMKII prevents stress-mediated facilitation of LTP maintenance in the hippocampal CA1 area. A, TBS-induced PS-LTP in slices prepared from nonstressed animals (●) and in slices prepared 2 hr after exposure of the animal to 1 hr of immobilization (○).B, TBS-induced PS-LTPs from animals that were injected intracerebroventricularly with KN-62 (⋄), BIS-I (■), or [Glu11,16]astressin (▴) immediately before 1 hr of immobilization. Hippocampal slices were prepared 2 hr after the end of the stress session. Data are presented as mean ± SEM.