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. 2017 Aug 7;8:186. doi: 10.3389/fendo.2017.00186

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Copyright © 2017 Wilczynski, Quispe, Muñoz and Penna.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Transverse sections through the brain of a Pleurodema thaul male showing arginine vasotocin (AVT)-immunoreactive cells at the level of amygdala (A,B) and preoptic area (POA) (C,D). (A) AVT cells in the medial amygdala (MA). AVT cells in the inset are magnified in (B); arrows indicate axonal varicosities characteristic of AVT neurons in many vertebrates. (C) AVT cells in the caudal POA. AVT cells in the inset are magnified in (D); arrowheads show parvo- (upper) and magnocellular (lower) neurons, which are interspersed in this magnocellular region of the POA. Scale bars on panel (C) (0.5 mm) and (D) (50 µm) also apply to (A,B) respectively. See abbreviation section for abbreviations used.