Maps from coronal sections of M. nemestrina depicting the distribution of NA axons (green) revealed by DβH immunohistochemistry, in representative stereotaxic AP levels. In the upper right corner, there is a scheme of a medial sagittal view of a hemisphere, modified from Olszewski (1952), where the thalamus is highlighted in gray, and red lines represent the AP levels shown in the maps. DβH-ir axons are present in all thalamic nuclei, but highly heterogeneously distributed, following a pattern similar to the one present in M. mulatta (Fig. 3). Note the dense innervation in midline nuclei (A–E), intralaminar nuclei (C–E) (particularly Pcn and Pf), Li, Sg (F), and in MDm (C,D). A moderate innervation is present in ventral motor nuclei, with higher densities in VAvm and X (A–C). A very low innervation is present in the GLd nucleus (C–E), where only some axons are identifiable. A moderate innervation is present in the somatosensory relay nuclei VPM and VPLc (C–E), as well as in the auditory relay nucleus GM (E,F). A heterogeneous innervation is present in the pulvinar complex (E–G). In R, NA axons are present mostly in its anterior and dorsal regions (A–E); note that ventral R regions in D-G are virtually devoid of NA innervation. The AP stereotaxic level is indicated for each section, and the calibration bar applies to all the maps in the Figure. See list of Abbreviations for identification of each thalamic nucleus.