Figure 7.

Cortical responses to simple transformations of tactile stimulus patterns. A, Deflection pattern inspired from naturalistic deflections (LC), along with the associated PSTH response of a single cortical cell over a 650 ms interval taken from the middle of a longer 6 s segment. All PSTHs in this figure share the same vertical scale. B, An HC version of the stimulus was created by scaling the LC sequence by a factor of 4. The HC response (gray) for the same cortical neuron is shown, along with the LC response for comparison (black, inverted scale). C, The TC stimulus was created by compressing the time axis of the LC sequence by a factor of 3, without altering the instantaneous velocities. The cortical response to the TC stimulus is shown (gray), along with the LC response (black, inverted scale) for comparison. Note the different timescale of the two traces.