Figure 2.

Firing rates of single units recorded from the mPFC during dual-task sessions. A, Example of three clusters recorded simultaneously from one tetrode in the mPFC of one rat during a dual-task session. Clusters remained stable between presession and postsession recordings, indicating that any observed differences in firing rate between tasks was not a function of cluster instability. B, Peak waveform amplitudes of all mPFC single units during presession and postsession recordings were highly and significantly correlated. C, Normalized firing rates of mPFC neurons did not differ significantly between session types at any maze location; however, the normalized firing rate was significantly lower than zero during both-good sessions during start-box occupancy. Error bars indicate 95% confidence intervals for 1-sample t tests with 0 null, *p < 0.05 for 1-sample t test with 0 null.