Figure 4.

Spikelet-related variance in climbing fiber reflex evoked CSs is correlated with size of responding population. (A) Extracellular recordings of evoked responses, which showed both an initial direct response (*) and a reflex response (arrows). In the top trace only a direct response is present, whereas the remaining traces have both responses. Note the variable number of spikelets in the reflex responses (initial spike and each spikelet indicated by an arrow). Inset at upper right: overlapping of reflex response from bottom four traces, aligned to the initial spike in the reflex response. (B) Scatterplot of baseline (black) and spikelet-related (red) variance vs. the number of PCs that responded to the reflex for a representative PC. In this experiment the data were analyzed from four PCs, all of which showed significant reflex response percentages (17, 22, 23, and 29%). Circles represent the data from trials in which a response was evoked for this PC (one cell responding means that a response was evoked in only this PC). (C) Average correlation values for the relationship between variance and number of responding cells for baseline (black) and spikelet-related (red) variance. Each circle represents the data from one cell. Horizontal bars indicate mean of population. Error bars show 1SD.