Fig. 2.

Induction of LTD elicited by PP stimulation involves both NMDA receptor channels and T-type Ca²⁺channels. A–C, Summary plots as described in Results and in Figure 1. All experiments were performed on 8- to 13-d-old rats. A, PP stimulation was applied in the presence of (50–100 μm) d-AP-5 (n = 10). B, PP stimulation was applied in the presence of 100 μm Ni²⁺(n = 7). C, PP stimulation was applied in the presence of both d-AP-5 (50 μm) and Ni²⁺ (100 μm) (n = 5).