Fig. 5.

Effects of Ca²⁺channel blockers and chelators on LTP maintenance. A, Nifedipine (20 μm) was applied for the period indicated by the horizontal bar (n = 5).B–F, Similar to A, but 30–50 nm (B) or 1 μmω-agatoxin IVA (C), 1 μmω-conotoxin GVIA (D), 50 μmNi²⁺ (E), or 2 μm EGTA-AM (F) was applied instead. The number of cells was five for each of A–E and eight for F. Squares andtriangles represent responses for conditioned and unconditioned pathways, respectively.