Combined adaptation in NM and NL. A, Stimulus with four conditions: (1) control without input adaptation, (2) adaptation of input rate and jitter, (3) rate only, and (4) jitter only. Plots show (from top to bottom) average firing rate of each input cell, jitter, ITD, and injected current. Condition 2 (inside dotted lines) is expanded at right. The current scale was adjusted for each cell to produce physiological firing rates. B, Mean NL firing rates (dotted lines, n = 8) and exponential fits (solid lines) at 0° IPD (top) and 180° (bottom). C, Dynamic range, normalized by the “start” value for the control condition. The “start” values represent the first IPD cycle, and the “end” values represent the last cycle. Asterisks indicate significant differences from control.