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Stimuli in the electrophysiology and psychophysics experiments. (A) Upper trace: noisy-amplitude train consisting of 20 deflections with varying amplitudes. Lower trace: frequency-matched constant-amplitude train. A 7-s pause was inserted between trains. The inset shows the Gaussian shape of individual deflections. (B) Scheme of rat whisker stimulation and electrophysiological recording. Whiskers are shown full length but were cut after insertion into ladder.
