Figure 3.

The Effect of Spatial Patterns on Time-Averaged Firing Rate

(A) Response of a representative unit showing higher firing under drifting grating (0.10 cpd; 3 Hz) than a full-field gray stimulus of equivalent irradiance (9 × 10¹⁴ photons.cm⁻².s⁻¹). (i) Mean firing rate over five sequential presentations of gray and grating stimuli (5 min each; paired t test; p < 0.0001) is shown. (ii) Firing rate profile (mean ± SEM) across a cycle of the grating (blue) or an equivalent time window under gray screen (red) is shown.

(B) As in (A) but for a unit showing lower firing under drifting grating (paired t test; p < 0.05).

(C) Percentage change in multiunit firing rate (n = 122 recording sites for five mice) under grating compared to uniform gray conditions (100% × (FR_Grating − FR_Uniform)/FR_Uniform; median and interquartile range shown in red).

See also Figures S1 and S3.