Fig. 1.

Inhibition of Iso-induced synaptic potentiation by P-type Ca²⁺ channel blockers. The EPSP amplitude was plotted against time. Bars denote periods of application of Iso (15 μm), ω-AgTX (10 nm), or nimodipine (1 μm). The slices were incubated in 10 nm ω-AgTX or 1 μm nimodipine for at least 30 min before being transferred to the recording chamber where the drug was present at the same concentration.