Fig. 1.

Example showing the activity pattern of 1 somatosensory cortex (SI) regular-spiking unit (RSU) within and outside of the texture. A: cartoon of the circular track. The rat's task was to run [¾] of the way around the track at a time for a food reward. There are 4 such unique [¾] turns. For data presentation, the circular track was “cut” at an arbitrary point and linearized as shown. B: raster plot from 1 cell during a single run session. Each of the 4 sets of rows corresponds to 1 of the unique types of [¾] laps. In 1 type (2nd set from the bottom), the rat does not run through the texture. Note that the cell fires consistently outside of the texture and increases firing within the texture. C: rate map formed by collapsing data across all trials. This cell fires around 8.3 Hz outside of the texture and reaches a peak firing rate within the texture >35 Hz. D: firing rate of the cell relative to position when the spiking of the cell has been modeled as a function of position and spiking history.