Figure 4.

CPP eliminated the calcium signal as well as the somatic spike/plateau potential. A, Image of the recorded TC neuron. The glutamate application site (indicated by asterisk) was 106 μm from the soma and 8 μm from the selected dendrite. The green arrowhead marks the dendritic site where the calcium signal was recorded during the line scans. B, The somatically recorded spike/plateau potential. Notice the marked reduction of the response during CPP. C, The corresponding Ca²⁺ transient. Notice that the Ca²⁺ transient was nearly eliminated by CPP (15 μm). D, In the presence of CPP, the response could not be recovered by stronger stimulation current.