Figure 1.

Fluorogold and CTb injection sites in experiments Pb1–3. Drawings to show the spread of tracer (shaded area) in these experiments. Each vertical column represents a single experiment, and the experiment number is shown at the bottom of the column. Numbers to the left give the approximate position of the section relative to the interaural plane. Drawings are based on those in Paxinos and Watson (2005). The upper six outlines in each column represent the Fluorogold injection (targetted on caudal thalamus), while the lower four show the spread of CTb (targetted on LPb). APT, anterior pretectal nucleus; CL, centrolateral thalamic nucleus; CM, central medial thalamic nucleus; CnF, cuneiform nucleus; fr, fasciculus retroflexus; IC, inferior colliculus; ic, internal capsule; KF, Kölliker-Fuse nucleus; LG, lateral geniculate nucleus; LP, lateral posterior thalamic nucleus; LPB, lateral parabrachial nucleus; MD, mediodorsal thalamic nucleus; MG, medial geniculate nucleus; MPB, medial parabrachial nucleus; PAG, periaqueductal gray matter; PC, paracentral thalamic nucleus; PF, parafascicular thalamic nucleus; PIL, posterior intralaminar thalamic nucleus; Po, posterior thalamic nuclear group; PoT, posterior thalamic nuclear group, triangular part; PP, peripeduncular nucleus; RRE, retrouniens area; SC, superior colliculus; scp, superior cerebellar peduncle; SubB, subbrachial nucleus; VPL, ventral posterolateral thalamic nucleus; VPM, ventral posteromedial thalamic nucleus; VPPC, ventral posterior thalamic nucleus, parvicellular part.