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. Author manuscript; available in PMC: 2016 Nov 1.
Published in final edited form as: J Comp Neurol. 2015 Jun 10;523(16):2426–2456. doi: 10.1002/cne.23797

Figure 1.

Figure 1

Photomicrographs illustrating representative cholera toxin β subunit (Ctβ) injection sites in the rostromedial tegmental nucleus (RMTg in A and B), ventral tegmental area (VTA in C) and lateral habenula (LHb in D). Outlines shown in the inset in B reflect the dense core and less dense periphery of the injection in relation to immunoreactivity against the μ-opioid receptor. See list for additional abbreviations. Scale bar: 1 mm.