Left, transition-activated pyramidal neuron activity during closed arm-to-center transitions selected from the light-on condition. Activities were normalized across sessions and compared by shuffling statistics to the baseline condition. Yellow stars mark a significant change in neuronal activity for the light-on condition (shuffling statistics 10,000x, significant probability thresholdp< 0.05, two-sided). Middle and right, bar graphs of transition-activated pyramidal neuron activity expressed as ratio of center activity compared to closed arm activity (bins -1 to 2 s over activity from -4 to -2 s within each stage). Arch group: two-tailed Mann-Whitney U test baseline vs. light-onp= 0.034, light-on vs. light-offp= 0.009; EYFP group: two-tailed Mann-Whitney U test baseline vs. light-onp= 0.39, light-on vs. light-offp= 0.052. Error bars represent +- SEM.
