The objective of this study was to describe the dendritic tree of major neuronal groups in amygdaloid posterior division and to analyze their quantitative characteristics. The peculiarities of neuronal organization were studied using rat brain frontal sections impregnated with Goldgi silver nitrate. Neurons were classified according to criteria developed by Leontovich (1978) and Polyakov (1973). It was found that the major groups of neurons are represented by long-axon sparsely branched, subcortical type long-axon densely branched and cortical type long-axon densely branched. Quantitative studies of seven characteristics of dendritic tree have shown that the most informative parameters of the existing differences between major neuronal groups were the number of branching points and the number of dendrite free ends. The contribution of sparsely branched and densely branched neuronal systems in the nuclei, paleocortex and diencephalic formations is described.