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refers to a cytoarchitecturally defined part of the amygdala. All authors regard it as occupying the caudal third of the amygdala, which abuts the hippocampal formation. In the human ( Mai-1997 ) and the macaque ( Amaral-1992 ) it is located close to the medial surface of the temporal lobe; it is bounded internally by the posterior cortical amygdalar nucleus and the temporal horn of the lateral ventricle.
In the rat ( Swanson-2004 ) and mouse ( Hof-2000 ) it is bounded largely by the posterior cortical amygdalar nucleus and the accessory basal nucleus (known as the basomedial nucleus of the amygdala in rodents); the stria terminalis separates it from the ventricle.
According to some authors the amygdalohippocampal area extends anteriorly to occupy the caudal half of the amygdala. These authors divide the area into two or three parts, which in the human ( Olmos-2004 ), the rat ( Paxinos-2009b ), and the mouse ( Franklin-2008 ) are named on the basis of location: anterolateral, posterolateral and posteromedial parts. In the macaque ( Paxinos-2009a ) the rostral portion of the area is divided into two parts on the basis of cellular morphology: magnocellular and parvicellular parts. Some authors refer to the area in rodents as the \'posterior amygdalar nucleus\' ( Swanson-2004; Hof-2000 ).
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