Figure 2.

The Effect of Eye Opening on Head Direction Tuning

(A) Four representative head direction cells recorded before eye opening at P14 and four different head direction cells recorded after eye opening at P15 in the same rats. Polar plots for the distribution of firing rate are shown for each cell. Rat number (five digits) and peak firing rate are indicated. All head directions were covered during all recording trials.

(B) Frequency distributions showing mean vector length of firing rate in observed data (top) and shuffled versions of the same data (bottom) before and after eye opening. The red stippled line and the red text indicate the 95^th percentile for mean vector length in the shuffled data.

(C) Percentage of head direction cells passing the 95^th percentile criterion for mean vector length of firing rate. The red stippled line indicates the upper limit for a 95% confidence interval around the proportion of cells, P₀, expected to pass the 95^th percentile criterion by chance (5%).

(D) Mean vector length of firing rate for cells recorded before and after eye opening (mean ± SEM for all head direction cells). The red stippled line indicates the 95^th percentile for mean vector length from the shuffled data.

(E) Within-trial directional correlation before and after eye opening (mean ± SEM).

(F) Between-trial directional correlation before and after eye opening (mean ± SEM).

See also Figure S2.