Table 3.

Mean values (±SEM) of stimulation intensities to evoke half-maximal fEPSP, fEPSP amplitude and PPF ratio of the four groups (enrichment (EH, n = 6), announced enrichment (AEH, n = 5)), a pharmacological treatment (imipramine (CON-IMI, n = 5)), vehicle treatment (CON-W, n = 6))

	Stimulus intensity (µA)	Amplitude	fEPSP (mV) PPF ratio
A-EH	89 ± 9	0.58 ± 0.12	1.58 ± 0.21
EH	94 ± 11	0.61 ± 0.15	1.41 ± 0.19
CON-IMI	101 ± 16	0.57 ± 0.12	1.47 ± 0.15
CON-W	87 ± 7	0.53 ± 0.13	1.43 ± 0.16