Monaural responses of the neuron of each ABL response type. A, Contra-preferred neuron. B, U-shaped neuron. C, Center-preferred neuron. A–C are the recordings from the same neurons as B–E. D–F, The normalized plots of the peak amplitude (top) and charge (bottom) sound-level functions in these neurons. D–F correspond to A–C, respectively. G, H, The percentage of the cells with three types of evoked charge sound-level functions in each binaural response type to ABL stimuli. M, Monotonic; S, saturated; N, nonmonotonic. G, EPSCs. H, IPSCs.