Xenbase Image ID: 86756

Figure 7. Schematics of frontal sections through the telencephalon of adult Xenopus, at intermediate (A) or caudal (B) levels, showing some of the major telencephalic divisions (pallium, subpallium) and subdivisions (striatum and pallidum in the subpallium; ventral pallium in the pallial domain), and the nuclei or areas included in them, as inferred from the expression patterns of several homeobox genes during development and in the adult. In frogs, the ventral pallium appears to include the postolfactory eminence (in the rostral septum), the ventral part of the classical lateral pallium, and some amygdalar nuclei, such as the lateral amygdalar nucleus (LA) and a major part of the medial amygdalar nucleus (MeA). The frog posterolateral amygdalar nucleus appears to belong to the lateral pallium. As in amniotes (Puelles et al., 2000), expression patterns of xDll4 and xNkx2.1 indicate that striatal-like and pallidal-like molecular subdivisions of the subpallium are found in the lateral telencephalic wall (including the basal ganglia and part of the amygdala) as well as in the septum of frogs (González et al., 2002a, b; Brox et al., 2003). In the subpallial amygdala, the so-called anterior and central amygdalar nuclei of frogs appear to belong to the striatal domain (Brox et al., 2003). On the other hand, a small part of the frog MeA may belong to the subpallium (maybe including a pallidal part; González et al., 2002a, b; Moreno and González, 2003). Thus, as in amniotes (Puelles et al., 2000), the amphibian amygdala appears to consist of lateral pallial, ventral pallial, striatal, and possibly pallidal subdivisions. See text for more details. For abbreviations , see list. Image published in: Brox A et al. (2004) Copyright © 2004. Image reproduced with permission of the Publisher, John Wiley & Sons. Larger Image Printer Friendly View

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