Figure 3.

Effects of glutamate blockers and repetitive stimuli on the slow signal. A-C, Effects of APV and CNQX on the evoked optical signals. The data were obtained from E16 preparations with maxillary (V₂) nerve stimulation. Thicker traces show controls, and thinner traces were obtained in APV (200 μm)-containing solution (A), CNQX (5 μm)-containing solution (B), and APV (190 μm)- and CNQX (5 μm)-containing solution (C). D, Decreasing slow signal amplitude with repetitive stimuli (0.1 Hz). The relative amplitudes of the slow signals in response to maxillary (V₂) nerve stimulation are plotted against the time in seconds. Data were obtained from an E16 preparation. The different symbols correspond to different positions.