Lower section numbers are more ventral. The injection site was located in the 1.75 kHz area of the rostral AVCN (sections 70, 76).Symbols in section 34 indicate the locations of three reconstructed axons where they cross the midline (filled square, axon 1 in Fig.4A; filled circle, axon 2 in Fig.4B; filled triangle, axon 3 in Fig. 6A). Scale bar, 1 mm. DCN, Dorsal cochlear nucleus; LTB, Lateral trapezoid body;PVCN, posteroventral cochlear nucleus; R, rostral.