Fig. 3.

Average experimentally observed STRF changes for various auditory tasks. (a) Tone detection induces an enhancement (excitatory area) of the STRF at the frequency of the target tone. (b) Multi-tone detection task induces an enhancement of responsiveness to all tones while suppressing frequencies in-between. (c) Two-tone discrimination task induces an enhancement at the target tone (top panel) and a suppression at the reference tone (bottom panel). (d) Tone-in-noise task in the high SNR case induces excitatory change in the near target neurons (top-left panel), and little change in far ones (top-right). In the low SNR condition, near target neurons do not show significant change (bottom-left), while the far neurons show a strong suppression (bottom-right). (e) Click-rate discrimination induces STRF changes along the temporal dimension. Example from one unit STRF shows a shortening in the latency of the STRF during the behavior (top-right) compare to the passive state (top-left). The STRF difference (STRF_diff, bottom) acts effectively as a differentiator (highpass filter) in time