Figure 5. Changes in the shape and half maximum firing rate of RLFs on deactivation of the contralateral IC.
(A–C) Control RLFs (black) with non-monotonic response functions with increasing sound level. With deactivation (red) RLFs became more monotonic and in some (B and C) the curves shifted to higher sound levels. These changes reversed on recovery (blue). (D–F) Normalizing the functions in the top row shows the sound level required to elicit half maximal firing increased during deactivation. (G) The population of half maximum firing rates increased on deactivation of the contralateral IC. (H) Changes in half maximum firing rates did not correlate with changes in threshold, indicating that the dominant effect of commissural input on firing rate was at supra-threshold levels.