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refers to a predominantly cellular structure defined on the basis of Nissl stain that wraps around the dorsal, rostral and ventral surfaces of the anterior commissure. It is bounded laterally by the internal capsule, medially by the anterior column of the fornix and the lateral septal nucleus, and dorsally by the head of the caudate nucleus and the frontal horn of the lateral ventricle. It is found in the human, the macaque, the rat and the mouse. Classically it is categorized as one of the septal nuclei ( Andy-1968 ). In recent decades, however, authors have, on the basis of other stains and connectivity studies, subdivided it and incorporated it into a broader concept: (bed) nuclei of stria terminalis. This includes cell groups classically identified with parts of the anterior hypothalamic region and the substantia innominata. In the Functional CNS Model - Rat the nuclei of stria terminalis are categorized as part of the ventral pallidum ( Swanson-2004 ).
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refers to a reconceptualization of the classical nucleus of stria terminalis that is based on multiple stains and connectivity. The nuclei include subdivisions of the nucleus of stria terminalis together with groups of similar cells distributed through the anterior hypothalamic region and dorsal part of substantia innominata to the central amygdalar nucleus. Whereas the classical nucleus of stria terminalis is categorized with the septal nuclei ( Andy-1968 ), the current, broader structural concept is assigned to different nuclear groups by different authors. For example, it is classified as part of the extended amygdala ( Heimer-1995 ) and, in the Functional CNS Model - Rat, it is classified as part of the extended pallidum ( Swanson-2004 ). Also, the structure is subdivided differently with partially overlapping terminologies in the human ( six parts in Mai-2004 ), the macaque ( ten parts in Paxinos-2009a ), the rat ( sixteen parts in Swanson-2004 ) and the mouse ( eight parts in Hof-2000 ). In the Functional CNS Model, which is based on the rat, the parts are divided into two groups, the anterior nuclei of stria terminalis and the posterior nuclei of stria terminalis.
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