Distribution of DAT-ir axons (red) in parasagittal sections of the rat thalamus. DAT-ir axons are presented over micrographs of nearby sections stained for AChE activity that reveal the various thalamic nuclei; these micrographs were rendered partially transparent to attenuate contrast and facilitate visualization of the DAT-ir axons. The lateral distance from the midline is given for each section; anterior is to the right, and posterior to the left in all sections. Note the paucity of immunolabeling in the dorsal thalamic nuclei and compare with the noticeable and extensive labeling in the dorsal thalamic nuclei of the monkey thalamus presented in Figure 1. In the rat, the structures most densely labeled are outside the dorsal thalamus: thalamic reticular nucleus (R), zona incerta (ZI), and lateral habenular nucleus (Hl). The calibration bar applies to (A)-(D). AD, anterodorsal nucleus; AM, anteromedial nucleus; AV, anteroventral nucleus; Ca, anterior commissure; Cd, caudate nucleus; Ci, internal capsule; CL, central lateral nucleus; F, fornix; Hm, medial habenular nucleus; LD, lateral dorsal nucleus; LP, lateral posterior nucleus; MD, mediodorsal nucleus; Pf, parafascicular nucleus; Po, posterior nucleus; Pt, parataenial nucleus; Pv, paraventricular nucleus; Thi, habenulo-interpeduncular tract; VL, ventral lateral nucleus; VM, ventral medial nucleus; VPL, ventral posterior lateral nucleus; VPM, ventral posterior medial nucleus.