Abbreviation

IPAC

Species

Mouse

Description of part

Dorsal to the anterior amygdaloid area and ventral to the fundus striati lies a region that is less cellular and less reactive for AChE than the fundus striati (Figs. 22-24 in Paxinos and Watson, 1986). In the rat, this region is shown to be reactive for substance P (Fig. 3E of Haber and Nauta, 1983), and this reactivity is continuous with that of the globus pallidus. The region has similar characteristics in the mouse. Paxinos and Watson (1986) named this region the substriatal area (SStr). More recently it has been suggested (Alheid et al., 1995) that this region should be named the interstitial nucleus of the posterior limb of the anterior commissure (IPAC) on the basis of its association with the posterior limb of the anterior commissure throughout most of its course, and we have followed this proposal (Figs. 27-36). This region is distinctive in receiving particular afferents from the amygdala.

Part type

gray matter

Nomenclature

Paxinos/Franklin-2001

Endorsement

The approach used by the collator Mihail Bota is not endorsed by the author of the nomenclature.

Collator argument

The hierarchy of this region was constructed using the rat atlas Paxinos and Watson 1998, and Alheid et al. 1995.

Reference