Figure 5.

Divisive gain change reduced the dynamic range of ITD and ILD response functions. A, An example single unit that was ILD-sensitive in the control condition (black circles). Deactivation of the contralateral IC suppressed firing (orange circles). Firing rate recovered to near control levels on cessation of deactivation (green triangles). B, Subtraction of the minimum firing rate in each condition showed that the dynamic spiking range over which ILD was encoded was reversibly reduced by deactivation. C, The dynamic ranges of the populations of ILD units and (D) ITD units were reduced by deactivation.