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. 2015 Mar 19;9:27. doi: 10.3389/fnana.2015.00027

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Copyright © 2015 Puelles and Rubenstein.

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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(A) Summary of antagonistic dorsoventral patterning effects spreading from the roof plate, including its rostralmost portion at the anterior commissure, and the floor plate, including its rostral hypothalamic sector. These effects presumably establish the alar-basal boundary (red line), as well as the telencephalo-hypothalamic boundary. The blue boxed area is examined in detail in (B). (B) Map of the known dorsoventral molecular regionalization of the alar and basal hypothalamus, held to result from graded finer interactive effects within the primary dorsoventral pattern. The alar-basal boundary is marked by the thick red line. The alar longitudinal domains are represented by the paraventricular area (subdivided into dorsal, central, and ventral microzones) and the subparaventricular area (this relates to the optic chiasm and the initial course of the optic tract). The basal hypothalamus consists of similarly dorsoventrally related tuberal and mamillary regions (sensu lato). The updated terminology proposes distinguishing tuberal (Tu) from retrotuberal (RTu) areas, as well as perimamillary and mamillary sensu stricto (PM, M) from periretromamillary and retromamillary sensu stricto areas (PRM, RM), respectively belonging to THy and PHy. Note the Tu/RTu complex can also be subdivided dorsoventrally into dorsal, intermediate and ventral microzones (TuD, TuI, TuV; RTuD, RTuI, RTuV).