Figure 1.

Histogram of the preferred theta firing phase of 141 identified pyramidal cells recorded along with the interneurons that are the main subject of this paper. The phase angles have been rotated 90° clockwise from the values derived from our local EEG recordings so that they conform to the convention of Csicsvari et al. (1999). The resulting equivalence of the phase convention is visible by comparing this histogram to Figure 5B of Csicsvari et al. (1999).