Binaural correlation and its effects on spatial tuning. The response of space-specific neurons changes with BC. Overlaid ITD curves for PSPs (a). Space-specific neurons were tuned to ILD despite changes in BC (b). These data were obtained while the other parameter (ITD or ILD) was kept at the most favorable value for the neuron. Dashed lines represent mean resting potential. For BC = 0, the membrane potential showed a smaller EPSP than for BC = 1 and favorable ITD (c). The amplitude of the depolarizing PSP decreased as BC became small (d). Error bars are omitted for clarity in a and b and represent the SD in d. Traces were median filtered to eliminate spikes and averaged over five repetitions.