Figure 2.
Features of STRFs and their agreement with tone-evoked responses. A, B, STRF generated by a family of moving ripples is shown as a two-dimensional plot, and the same STRF plotted in three dimensions is shown below. Excitation is indicated in red and inhibition in blue, with black contour lines depicting significant regions (see Materials and Methods). The BFSTRF, the frequency on the spectral axis of the STRF that had the highest peak on the temporal axis, was ∼25 kHz. The STRF also had both onset and offset inhibitions, whose frequencies corresponded to but were temporally separated from the excitatory region, and an inhibitory region that flanked the low frequency side of the excitatory region. C, The tuning curve of the same neuron generated by tone-evoked responses. The BF, the frequency to which the neuron was most sensitive, of the tone-evoked tuning curve was also 25 kHz. D, E, Plots showing agreement between tone evoked responses and STRFs in 43 IC neurons.