Dichotic stimulation and responses of AN1, AN2, and ON1. A, Schematic drawing of the connections between receptors, AN1 and AN2 (denoted here as ANs), and ON1. All three interneurons exist as mirror image pairs; only the recorded neurons are shown. B, Excerpts of the responses of AN1, AN2, and ON1 to RAM stimuli during monaural and binaural stimulation. Responses to 4.5 and 30 kHz are from different experiments. The shaded areas highlight increased spiking of ON1, and decreased spiking of the ANs, for binaural stimulation.