Distribution of preferred firing phases for place cells recorded during foraging sessions in CA1 (Top) and CA3 (Bottom) from control (CTL) and eFSE animals. CTL CA1 cells showed a significant phase preference at 214° while eFSE cells had a mean, nonsignificant, phase angle preference of 194°. CTL CA3 cells had a significant phase preference toward the descending phase of θ (257°) as did eFSE animals (226°). During active avoidance CTL CA1 cells significantly shifted phase preference to the descending phase of Θ at 260° while eFSE CA1 cells exhibited a lack of phase preference. CTL CA1 phase preference shifts away from peak Θ puts cell firing preference in CA1 and CA3 in alignment.
