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. 2015 Feb 13;9:8. doi: 10.3389/fnsys.2015.00008

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Copyright © 2015 Urstadt and Stanley.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution and 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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Anterograde tract tracing evidence from various studies indicates an ascending trans-pallidal LH to AcbSh circuit in the rat brain. PHA-L-infiltrated neurons in the suprafornical LH (LHAs; panel A) and the anterior subfornical LH (LHAsfa; panel C) send moderate amounts of fibers to the amVP (panels B and D) (Goto et al., 2005; Hahn and Swanson, 2010). PHA-L-labeled neurons in the amVP (panel E) send projections to the anterior (panel F) and especially posterior (panel G) medial AcbSh (Groenewegen et al., 1993). Thus, the VP subregion receiving LH input projects in turn to the medial AcbSh. Abbreviations: BST—bed nucleus of the stria terminalis; cp—cerebral peduncle; fx—fornix; LHA—lateral hypothalamic area; LPO—lateral preoptic area; MPO—medial preoptic area; mt—mammillothalamic tract; NDB—diagonal band nucleus; och—optic chiasm; opt—optic tract; V3—third ventricle; VP—ventral pallidum; ZI—zona incerta.