Figure 8.

Movement selective responses encode movement direction, rather than movement destination A, movement selectivity in an example neuron. This neuron fired more robustly during movement to the left reward receptacle (left panel; black line) relative to rightward movement (grey line). The difference in firing was significant (right panel; P < 0.05, comparing left versus right movement, t test). Histograms are constructed around reward receptacle entry (RR). Values shown indicate mean firing rates in the 400 ms preceding reward receptacle entry for each movement direction. Broken grey line indicates baseline firing rate. B, selective firing in the example neuron shown in A was much reduced during spontaneous approach to the reward receptacles (P > 0.05). Firing was near baseline spike rate during spontaneous approach to both the left (black line) and right (grey line) reward receptacles. C, selective firing was significantly higher during correct task performance, relative to spontaneous reward receptacle approach (P < 0.001, Wilcoxon's signed rank test). Bar chart shows median, first and third quartile values.