Supplementary Figure 3: Naturalistic stimuli.

a, The 17 motion sequences of an ex vivo B2 vibrissa contacting a rotating drum covered in sandpaper that were used for natural stimulus presentation in the detection task. b, Impact of optical stimulation in a control (Cre-negative littermate) animal on the natural scenes task. This mouse was injected with ChR2 and subjected to the same training protocol as all other mice. In contrast with the four Cre-positive animals, no significant modulation by the laser was observed (R² = 0.073, P = 0.30).